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annotate zruntime.S @ 915:9e882eca717e

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Initial support for relative mouse mode and skeleton of support for capture mode. Avoid mouse position overflow in absolute mode. Allow absolute mode to be set by ROM DB.
author Michael Pavone <pavone@retrodev.com>
date Tue, 15 Dec 2015 20:01:50 -0800
parents e13f4fd9cf6d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
284
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
1 z_inccycles_io:
ed7098f717d7 Implement IN and OUT (untested)
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parents: 281
diff changeset
2 cmp %edi, %ebp
ed7098f717d7 Implement IN and OUT (untested)
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parents: 281
diff changeset
3 jnb do_limit
ed7098f717d7 Implement IN and OUT (untested)
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parents: 281
diff changeset
4 no_sync_io:
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
5 add $4, %ebp
ed7098f717d7 Implement IN and OUT (untested)
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parents: 281
diff changeset
6 ret
ed7098f717d7 Implement IN and OUT (untested)
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parents: 281
diff changeset
7 do_limit_io:
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
8 cmp 112(%rsi), %ebp
ed7098f717d7 Implement IN and OUT (untested)
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parents: 281
diff changeset
9 jb no_sync_io
ed7098f717d7 Implement IN and OUT (untested)
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parents: 281
diff changeset
10 jmp sync_io
ed7098f717d7 Implement IN and OUT (untested)
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parents: 281
diff changeset
11
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
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12 z_inccycles:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
13 cmp %edi, %ebp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
14 jnb do_limit
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
15 no_sync:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
16 add $3, %ebp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
17 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
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18 do_limit:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
19 cmp 112(%rsi), %ebp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
20 jb no_sync
284
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
21 sync_io:
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 393
diff changeset
22 movw $0, 164(%rsi)
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
23 call z80_save_context_scratch
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
24 pop %rax /*return address in read/write func*/
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
25 pop 104(%rsi) /*return address in native code*/
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
26 sub $5, %rax /* adjust return addres to point to the call instruction that got us here */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
27 mov %rax, (%rsi)
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 393
diff changeset
28
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
29 pop %r15 /* restore callee saved regsiters */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
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30 pop %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
31 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
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32 pop %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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33 pop %rbp
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34 pop %rbx
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
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35 ret /* return to caller of z80_run */
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 393
diff changeset
36
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
37 forced_sync:
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
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parents: 507
diff changeset
38 movw $0, 164(%rsi)
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
39 call z80_save_context_scratch
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
40 pop (%rsi) /*return address in read/write func*/
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
41 pop 104(%rsi) /*return address in native code*/
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
42
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
43 pop %r15 /* restore callee saved regsiters */
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
44 pop %r14
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
45 pop %r13
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
46 pop %r12
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
47 pop %rbp
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
48 pop %rbx
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
49 ret /* return to caller of z80_run */
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
50
249
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51 .global z80_handle_cycle_limit_int
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parents:
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52 z80_handle_cycle_limit_int:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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53 cmp 116(%rsi), %ebp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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54 jb zskip_int
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55 mov 112(%rsi), %ebp /* set cycle limit to sync cycle */
375
134ffb72d7a1 Clear IFF1 and IFF2 when an interrupt is taken on the Z80
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parents: 357
diff changeset
56 /* not sure this is really necessary now that IFF1 and IFF2 are geting cleared */
335
14a937097c2b Some Z80 interrupt fixes
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diff changeset
57 movl $0xFFFFFFFF, 116(%rsi) /* make sure the interrupt doesn't fire more than once */
375
134ffb72d7a1 Clear IFF1 and IFF2 when an interrupt is taken on the Z80
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diff changeset
58 /* disable interrupts */
134ffb72d7a1 Clear IFF1 and IFF2 when an interrupt is taken on the Z80
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parents: 357
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59 movb $0, 96(%rsi)
134ffb72d7a1 Clear IFF1 and IFF2 when an interrupt is taken on the Z80
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parents: 357
diff changeset
60 movb $0, 97(%rsi)
249
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61 add $7, %ebp
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62 sub $2, %r9w
259
d9417261366f Fix a remaining z80_write reg swap bug. Properly initialize the native map slots. Reset appropriate regs when z80_reset is called.
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parents: 253
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63 mov %r9w, %r14w
249
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64 call z_inccycles
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d9417261366f Fix a remaining z80_write reg swap bug. Properly initialize the native map slots. Reset appropriate regs when z80_reset is called.
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parents: 253
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65 push %r13
249
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66 call z80_write_byte_noinc
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d9417261366f Fix a remaining z80_write reg swap bug. Properly initialize the native map slots. Reset appropriate regs when z80_reset is called.
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parents: 253
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67 pop %r13
d9417261366f Fix a remaining z80_write reg swap bug. Properly initialize the native map slots. Reset appropriate regs when z80_reset is called.
Mike Pavone <pavone@retrodev.com>
parents: 253
diff changeset
68 mov %r9w, %r14w
d9417261366f Fix a remaining z80_write reg swap bug. Properly initialize the native map slots. Reset appropriate regs when z80_reset is called.
Mike Pavone <pavone@retrodev.com>
parents: 253
diff changeset
69 add $1, %r14w
d9417261366f Fix a remaining z80_write reg swap bug. Properly initialize the native map slots. Reset appropriate regs when z80_reset is called.
Mike Pavone <pavone@retrodev.com>
parents: 253
diff changeset
70 shr $8, %r13w
249
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71 call z_inccycles
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72 call z80_write_byte_noinc
276
eec7072189a1 Fix crash bug in Z80 interrupt support
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parents: 261
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73 pop %r14 /*dispose of return address */
249
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74 /* TODO: Support interrupt mode 0 and 2 */
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75 mov $0x38, %r13w
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76 call z80_native_addr
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77 jmp *%r13
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78 zskip_int:
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79 cmp 112(%rsi), %ebp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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80 jb zskip_sync
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 393
diff changeset
81 mov %r13w, 164(%rsi)
249
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82 .global z80_do_sync
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83 z80_do_sync:
281
44f0bbf57b4f Save context in z80_do_sync
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parents: 280
diff changeset
84 call z80_save_context
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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85 pop (%rsi) /*return address in native code*/
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
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86 pop %r15 /* restore callee saved regsiters */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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diff changeset
87 pop %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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88 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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89 pop %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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90 pop %rbp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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91 pop %rbx
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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92 zskip_sync:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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93 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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94
285
021aeb6df19b Implement HALT (sort of tested)
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parents: 284
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95 .global z80_halt
021aeb6df19b Implement HALT (sort of tested)
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96 z80_halt:
021aeb6df19b Implement HALT (sort of tested)
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parents: 284
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97 mov %edi, %r14d
021aeb6df19b Implement HALT (sort of tested)
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parents: 284
diff changeset
98 sub %ebp, %r14d
021aeb6df19b Implement HALT (sort of tested)
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parents: 284
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99 and $0xFFFFFFFC, %r14d
021aeb6df19b Implement HALT (sort of tested)
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parents: 284
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100 add %r14d, %ebp
021aeb6df19b Implement HALT (sort of tested)
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parents: 284
diff changeset
101 cmp %edi, %ebp
021aeb6df19b Implement HALT (sort of tested)
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parents: 284
diff changeset
102 jnb z80_handle_cycle_limit_int
021aeb6df19b Implement HALT (sort of tested)
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parents: 284
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103 add $4, %ebp
021aeb6df19b Implement HALT (sort of tested)
Mike Pavone <pavone@retrodev.com>
parents: 284
diff changeset
104 jmp z80_handle_cycle_limit_int
021aeb6df19b Implement HALT (sort of tested)
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parents: 284
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105
249
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106 .global z80_read_byte
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107 z80_read_byte:
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108 call z_inccycles
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109 z80_read_byte_noinc:
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110 cmp $0x4000, %r13w
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111 jb z80_read_ram
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112 cmp $0x8000, %r13w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
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113 jae z80_read_bank
290
171f97e70d85 Implement writes from Z80 to YM-2612
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parents: 285
diff changeset
114 cmp $0x6000, %r13w
171f97e70d85 Implement writes from Z80 to YM-2612
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parents: 285
diff changeset
115 jb z80_read_ym2612
249
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116 /* TODO: Bank reg, YM-2612, PSG/VDP */
280
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
117 mov $0xFF, %r13b
249
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118 ret
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119 z80_read_ram:
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120 and $0x1FFF, %r13
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121 mov (%r11, %r13), %r13b
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
122 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
123 z80_read_bank:
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
124 /* approximation of wait states for normal 68K bus access */
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
125 add $3, %ebp
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
126 push %rsi
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
127 mov 144(%rsi), %rsi /* get system context pointer */
559
6b248602ab84 blastem builds and almost works on OS X now
Mike Pavone <pavone@retrodev.com>
parents: 509
diff changeset
128 cmpb $0, 120(%rsi) /* check bus busy flag */
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
129 pop %rsi
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
130 jne bus_busy
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
131 z80_read_bank_cont:
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
132 and $0x7FFF, %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
133 cmp $0, %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
134 je slow_bank_read
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
135 /* 68K memory is byte swapped */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
136 xor $1, %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
137 mov (%r12, %r13), %r13b
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
138 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
139 slow_bank_read:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
140 /* TODO: Call into C to implement this */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
141 ret
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
142 bus_busy:
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
143 cmp %ebp, %edi
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
144 jbe no_adjust
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
145 mov %edi, %ebp
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
146 no_adjust:
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
147 call forced_sync
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
148 jmp z80_read_bank_cont
290
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
149 z80_read_ym2612:
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
150 call z80_save_context
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
151 mov %r13w, %di
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
152 push %rsi
562
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
153 test $8, %rsp
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
154 jnz 0f
290
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
155 call z80_read_ym
562
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
156 jmp 1f
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
157 0:
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
158 sub $8, %rsp
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
159 call z80_read_ym
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
160 add $8, %rsp
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
161 1:
290
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
162 pop %rsi
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
163 mov %al, %r13b
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
164 call z80_load_context
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
165 ret
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
166
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
167 .global z80_write_byte
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
168 z80_write_byte:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
169 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
170 z80_write_byte_noinc:
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
171 cmp $0x4000, %r14w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
172 jb z80_write_ram
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
173 cmp $0x8000, %r14w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
174 jae z80_write_bank
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
175 cmp $0x6000, %r14w
290
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
176 jb z80_write_ym2612
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
177 cmp $0x6100, %r14w
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
178 jb z80_write_bank_reg
357
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
179 cmp $0x7F00, %r14w
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
180 jae z80_write_vdp
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
181 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
182 z80_write_ram:
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
183 and $0x1FFF, %r14
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
184 mov %r13b, (%r11, %r14)
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
185 mov %r14d, %r13d
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
186 shr $7, %r13d
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
187 bt %r13d, 152(%rsi)
252
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
188 jnc not_code
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
189 call z80_save_context
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
190 mov %r14d, %edi
252
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
191 call z80_handle_code_write
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
192 mov %rax, %rsi
261
f0c53a4bbfa3 Implement LDIR and fix a bug in which context was not restored after a call to z80_handle_code_write
Mike Pavone <pavone@retrodev.com>
parents: 259
diff changeset
193 call z80_load_context
252
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
194 not_code:
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
195 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
196 z80_write_bank:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
197 slow_bank_write:
507
cc6030bd04c6 Add 3 wait states to Z80 access to bank area since that seems to be roughly the average in normal usage
Michael Pavone <pavone@retrodev.com>
parents: 451
diff changeset
198 /* approximation of wait states for 68K bus access */
cc6030bd04c6 Add 3 wait states to Z80 access to bank area since that seems to be roughly the average in normal usage
Michael Pavone <pavone@retrodev.com>
parents: 451
diff changeset
199 add $3, %ebp
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
200 /* TODO: Call into C to implement this */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
201 ret
290
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
202 z80_write_ym2612:
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
203 and $0x3, %r14w
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
204 call z80_save_context
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
205 mov %r14w, %di
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
206 mov %r13b, %dl
562
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
207 test $8, %rsp
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
208 jnz 0f
290
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
209 call z80_write_ym
562
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
210 jmp 1f
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
211 0:
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
212 sub $8, %rsp
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
213 call z80_write_ym
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
214 add $8, %rsp
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
215 1:
290
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
216 mov %rax, %rsi
357
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
217 jmp z80_load_context
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
218 z80_write_bank_reg:
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
219 and $1, %r13w
280
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
220 shr %r15w
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
221 shl $8, %r13w
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
222 xor %r12, %r12
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
223 or %r13w, %r15w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
224 and $0x1FF, %r15w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
225 cmp $0x80, %r15w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
226 jb update_bank_ptr
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
227 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
228 update_bank_ptr:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
229 mov %r15w, %r12w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
230 shl $15, %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
231 add 80(%rsi), %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
232 ret
357
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
233 z80_write_vdp:
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
234 and $0xFF, %r14w
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
235 call z80_save_context
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
236 mov %r14w, %di
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
237 mov %r13b, %dl
562
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
238 test $8, %rsp
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
239 jnz 0f
357
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
240 call z80_vdp_port_write
562
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
241 jmp 1f
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
242 0:
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
243 sub $8, %rsp
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
244 call z80_vdp_port_write
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
245 add $8, %rsp
e13f4fd9cf6d Ensure proper stack alignment when the Z80 calls into C code. This fixes a crash in optimized builds on OSX
Mike Pavone <pavone@retrodev.com>
parents: 559
diff changeset
246 1:
357
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
247 mov %rax, %rsi
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
248 jmp z80_load_context
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
250 .global z80_read_word
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
251 z80_read_word:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
252 call z_inccycles
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
253 cmp $0x8000, %r13w
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
254 jae z80_read_bank_word
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
255 push %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
256 call z80_read_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
257 mov %r13b, %r14b
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
258 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
259 inc %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
260 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
261 call z80_read_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
262 shl $8, %r13w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
263 mov %r14b, %r13b
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
264 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
265
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
266 z80_read_bank_word:
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
267 add $3, %ebp /* first read typically has 3 wait states */
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
268 push %rsi
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
269 mov 144(%rsi), %rsi /* get system context pointer */
559
6b248602ab84 blastem builds and almost works on OS X now
Mike Pavone <pavone@retrodev.com>
parents: 509
diff changeset
270 cmpb $0, 120(%rsi) /* check bus busy flag */
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
271 pop %rsi
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
272 jne bus_busy_word
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
273 z80_read_bank_word_cont:
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
274 push %r13
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
275 call z80_read_bank_cont
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
276 mov %r13b, %r14b
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
277 pop %r13
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
278 inc %r13
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
279 call z_inccycles
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
280 add $4, %ebp /* second read typically has 4 wait states */
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
281 push %rsi
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
282 mov 144(%rsi), %rsi /* get system context pointer */
559
6b248602ab84 blastem builds and almost works on OS X now
Mike Pavone <pavone@retrodev.com>
parents: 509
diff changeset
283 cmpb $0, 120(%rsi) /* check bus busy flag */
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
284 pop %rsi
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
285 jne bus_busy_word2
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
286 z80_read_bank_word_cont2:
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
287 call z80_read_bank_cont
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
288 shl $8, %r13w
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
289 mov %r14b, %r13b
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
290 ret
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
291
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
292 bus_busy_word:
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
293 cmp %ebp, %edi
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
294 jb no_adjust_word
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
295 mov %edi, %ebp
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
296 no_adjust_word:
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
297 call forced_sync
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
298 jmp z80_read_bank_word_cont
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
299
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
300 foofoo:
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
301 jmp foofoo
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
302
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
303 bus_busy_word2:
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
304 cmp %ebp, %edi
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
305 jb no_adjust_word2
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
306 mov %edi, %ebp
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
307 no_adjust_word2:
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
308 call forced_sync
509
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
309 jmp z80_read_bank_word_cont2
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
310 blahblah:
b3738ee58195 Fix accidental use of the conditional jump instruction jp instead of jmp
Michael Pavone <pavone@retrodev.com>
parents: 508
diff changeset
311 jmp blahblah
508
b976c6d6e5fb Initial attempt at emulating extended bank area access delays when 68K bus is busy with VDP stuff. Also emulate the extra delay on the second access of a word-wide read to the bank area. Needs work as it seems to break stuff.
Michael Pavone <pavone@retrodev.com>
parents: 507
diff changeset
312
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
313 .global z80_write_word_highfirst
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
314 z80_write_word_highfirst:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
315 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
316 push %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
317 push %r13
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
318 add $1, %r14w
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
319 shr $8, %r13w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
320 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
321 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
322 pop %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
323 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
324 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
325 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
326
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
327 .global z80_write_word_lowfirst
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
328 z80_write_word_lowfirst:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
329 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
330 push %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
331 push %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
332 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
333 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
334 pop %r14
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
335 add $1, %r14w
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
336 shr $8, %r13w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
337 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
338 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
339 ret
284
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
340
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
341 .global z80_io_read
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
342 z80_io_read:
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
343 call z_inccycles_io
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
344 /* genesis Z80 has no IO port hardware and always returns FF */
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
345 mov $0xFF, %r13
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
346 ret
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
347
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
348 .global z80_io_write
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
349 z80_io_write:
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
350 call z_inccycles_io
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
351 /* genesis Z80 has no IO port hardware and writes have no effect */
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
352 ret
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 393
diff changeset
353
252
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
354 .global z80_retrans_stub
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
355 z80_retrans_stub:
390
561fe3ea3fc8 Use a call instruction to figure out the original native address when retranslating so that it does not get lost when the byte transforms from a instruction word to extension word
Mike Pavone <pavone@retrodev.com>
parents: 375
diff changeset
356 pop %r14
252
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
357 call z80_save_context
390
561fe3ea3fc8 Use a call instruction to figure out the original native address when retranslating so that it does not get lost when the byte transforms from a instruction word to extension word
Mike Pavone <pavone@retrodev.com>
parents: 375
diff changeset
358 /* adjust for mov and call instructions */
393
30c250a41629 Fix address adjustement in z80_retrans_stub
Mike Pavone <pavone@retrodev.com>
parents: 390
diff changeset
359 sub $11, %r14
252
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
360 mov %r13d, %edi
390
561fe3ea3fc8 Use a call instruction to figure out the original native address when retranslating so that it does not get lost when the byte transforms from a instruction word to extension word
Mike Pavone <pavone@retrodev.com>
parents: 375
diff changeset
361 mov %r14, %rdx
252
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
362 push %rsi
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
363 call z80_retranslate_inst
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
364 pop %rsi
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
365 mov %rax, %r13
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
366 call z80_load_context
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
367 jmp *%r13
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
368
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
369 .global z80_native_addr
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
370 z80_native_addr:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
371 call z80_save_context
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
372 push %rsi
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 393
diff changeset
373 mov %rsi, %rdi
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
374 movzx %r13w, %esi
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
375 call z80_get_native_address_trans
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
376 mov %rax, %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
377 pop %rsi
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
378 call z80_load_context
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
379 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
380
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
381 z80_save_context_scratch:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
382 mov %r13w, 98(%rsi) /* scratch1 */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
383 mov %r14w, 100(%rsi) /* scratch2 */
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 393
diff changeset
384
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
385 .global z80_save_context
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
386 z80_save_context:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
387 mov %r9w, 8(%rsi) /* SP */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
388 mov %r15w, 16(%rsi) /* bank register */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
389 mov %bx, 18(%rsi) /* BC */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
390 mov %cx, 20(%rsi) /* DE */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
391 mov %ax, 22(%rsi) /* HL */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
392 mov %dx, 24(%rsi) /* IX */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
393 mov %r8w, 26(%rsi) /* IY */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
394 mov %r10b, 30(%rsi) /* A */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
395 mov %edi, 48(%rsi) /* target_cycle */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
396 mov %ebp, 52(%rsi) /* current_cycle */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
397 mov %r12, 72(%rsi) /* cartridge bank pointer */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
398 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
399
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
400
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
401 z80_load_context_scratch:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
402 mov 98(%rsi), %r13w /* scratch1 */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
403 mov 100(%rsi), %r14w /* scratch2 */
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 393
diff changeset
404
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
405 .global z80_load_context
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
406 z80_load_context:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
407 mov 8(%rsi), %r9w /* SP */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
408 mov 16(%rsi), %r15w /* bank register */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
409 mov 18(%rsi), %bx /* BC */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
410 mov 20(%rsi), %cx /* DE */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
411 mov 22(%rsi), %ax /* HL */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
412 mov 24(%rsi), %dx /* IX */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
413 mov 26(%rsi), %r8w /* IY */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
414 mov 30(%rsi), %r10b /* A */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
415 mov 48(%rsi), %edi /* target_cycle */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
416 mov 52(%rsi), %ebp /* current_cycle */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
417 mov 64(%rsi), %r11 /* z80 RAM */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
418 mov 72(%rsi), %r12 /* cartridge bank pointer */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
419 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
420
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
421 .global z80_run
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
422 z80_run:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
423 push %rbx
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
424 push %rbp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
425 push %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
426 push %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
427 push %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
428 push %r15
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
429 mov %rdi, %rsi
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
430 call z80_load_context_scratch
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
431 cmpq $0, 104(%rsi)
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
432 je no_extra
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
433 push 104(%rsi)
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
434 movq $0, 104(%rsi)
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
435 no_extra:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
436 jmp *(%rsi)
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 393
diff changeset
437