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annotate zruntime.S @ 504:7b0df1aaf384

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Add support for left and right shift keys
author Mike Pavone <pavone@retrodev.com>
date Thu, 31 Oct 2013 01:00:32 -0700
parents b7c3b2d22858
children cc6030bd04c6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
284
ed7098f717d7 Implement IN and OUT (untested)
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parents: 281
diff changeset
1 z_inccycles_io:
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2 cmp %edi, %ebp
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3 jnb do_limit
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4 no_sync_io:
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5 add $4, %ebp
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6 ret
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7 do_limit_io:
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8 cmp 112(%rsi), %ebp
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9 jb no_sync_io
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10 jmp sync_io
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11
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12 z_inccycles:
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13 cmp %edi, %ebp
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14 jnb do_limit
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15 no_sync:
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16 add $3, %ebp
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17 ret
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18 do_limit:
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19 cmp 112(%rsi), %ebp
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20 jb no_sync
284
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21 sync_io:
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
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22 movw $0, 164(%rsi)
249
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23 call z80_save_context_scratch
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24 pop %rax /*return address in read/write func*/
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25 pop 104(%rsi) /*return address in native code*/
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26 sub $5, %rax /* adjust return addres to point to the call instruction that got us here */
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27 mov %rax, (%rsi)
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28
249
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29 pop %r15 /* restore callee saved regsiters */
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30 pop %r14
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31 pop %r13
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32 pop %r12
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33 pop %rbp
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34 pop %rbx
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35 ret /* return to caller of z80_run */
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36
249
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37 .global z80_handle_cycle_limit_int
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38 z80_handle_cycle_limit_int:
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39 cmp 116(%rsi), %ebp
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40 jb zskip_int
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41 mov 112(%rsi), %ebp /* set cycle limit to sync cycle */
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134ffb72d7a1 Clear IFF1 and IFF2 when an interrupt is taken on the Z80
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42 /* not sure this is really necessary now that IFF1 and IFF2 are geting cleared */
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14a937097c2b Some Z80 interrupt fixes
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43 movl $0xFFFFFFFF, 116(%rsi) /* make sure the interrupt doesn't fire more than once */
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134ffb72d7a1 Clear IFF1 and IFF2 when an interrupt is taken on the Z80
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44 /* disable interrupts */
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45 movb $0, 96(%rsi)
134ffb72d7a1 Clear IFF1 and IFF2 when an interrupt is taken on the Z80
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46 movb $0, 97(%rsi)
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47 add $7, %ebp
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48 sub $2, %r9w
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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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49 mov %r9w, %r14w
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50 call z_inccycles
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51 push %r13
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52 call z80_write_byte_noinc
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53 pop %r13
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54 mov %r9w, %r14w
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55 add $1, %r14w
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56 shr $8, %r13w
249
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57 call z_inccycles
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58 call z80_write_byte_noinc
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eec7072189a1 Fix crash bug in Z80 interrupt support
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59 pop %r14 /*dispose of return address */
249
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60 /* TODO: Support interrupt mode 0 and 2 */
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61 mov $0x38, %r13w
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62 call z80_native_addr
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63 jmp *%r13
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64 zskip_int:
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65 cmp 112(%rsi), %ebp
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66 jb zskip_sync
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67 mov %r13w, 164(%rsi)
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68 .global z80_do_sync
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69 z80_do_sync:
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70 call z80_save_context
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71 pop (%rsi) /*return address in native code*/
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72 pop %r15 /* restore callee saved regsiters */
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73 pop %r14
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74 pop %r13
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75 pop %r12
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76 pop %rbp
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77 pop %rbx
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78 zskip_sync:
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79 ret
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80
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021aeb6df19b Implement HALT (sort of tested)
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81 .global z80_halt
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82 z80_halt:
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83 mov %edi, %r14d
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84 sub %ebp, %r14d
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85 and $0xFFFFFFFC, %r14d
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86 add %r14d, %ebp
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87 cmp %edi, %ebp
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88 jnb z80_handle_cycle_limit_int
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89 add $4, %ebp
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90 jmp z80_handle_cycle_limit_int
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91
249
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92 .global z80_read_byte
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93 z80_read_byte:
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94 call z_inccycles
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95 z80_read_byte_noinc:
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96 cmp $0x4000, %r13w
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97 jb z80_read_ram
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98 cmp $0x8000, %r13w
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99 jae z80_read_bank
290
171f97e70d85 Implement writes from Z80 to YM-2612
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100 cmp $0x6000, %r13w
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101 jb z80_read_ym2612
249
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102 /* TODO: Bank reg, YM-2612, PSG/VDP */
280
9ee64039ddeb Fix bank register update
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103 mov $0xFF, %r13b
249
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104 ret
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105 z80_read_ram:
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106 and $0x1FFF, %r13
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107 mov (%r11, %r13), %r13b
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108 ret
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109 z80_read_bank:
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110 and $0x7FFF, %r13
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111 cmp $0, %r12
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112 je slow_bank_read
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113 /* 68K memory is byte swapped */
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114 xor $1, %r13
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115 mov (%r12, %r13), %r13b
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116 ret
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117 slow_bank_read:
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118 /* TODO: Call into C to implement this */
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119 ret
290
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120 z80_read_ym2612:
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121 call z80_save_context
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122 mov %r13w, %di
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123 push %rsi
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124 call z80_read_ym
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125 pop %rsi
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126 mov %al, %r13b
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127 call z80_load_context
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128 ret
249
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129
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130 .global z80_write_byte
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131 z80_write_byte:
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
132 call z_inccycles
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
133 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
134 cmp $0x4000, %r14w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
135 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
136 cmp $0x8000, %r14w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
137 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
138 cmp $0x6000, %r14w
290
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
139 jb z80_write_ym2612
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
140 cmp $0x6100, %r14w
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
141 jb z80_write_bank_reg
357
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
142 cmp $0x7F00, %r14w
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
143 jae z80_write_vdp
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
144 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
145 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
146 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
147 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
148 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
149 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
150 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
151 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
152 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
153 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
154 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
155 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
156 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
157 not_code:
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
158 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
159 z80_write_bank:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
160 slow_bank_write:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
161 /* 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
162 ret
290
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
163 z80_write_ym2612:
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
164 and $0x3, %r14w
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
165 call z80_save_context
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
166 mov %r14w, %di
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
167 mov %r13b, %dl
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
168 call z80_write_ym
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
169 mov %rax, %rsi
357
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
170 jmp z80_load_context
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
171 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
172 and $1, %r13w
280
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
173 shr %r15w
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
174 shl $8, %r13w
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
175 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
176 or %r13w, %r15w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
177 and $0x1FF, %r15w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
178 cmp $0x80, %r15w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
179 jb update_bank_ptr
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
180 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
181 update_bank_ptr:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
182 mov %r15w, %r12w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
183 shl $15, %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
184 add 80(%rsi), %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
185 ret
357
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
186 z80_write_vdp:
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
187 and $0xFF, %r14w
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
188 call z80_save_context
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
189 mov %r14w, %di
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
190 mov %r13b, %dl
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
191 call z80_vdp_port_write
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
192 mov %rax, %rsi
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
193 jmp z80_load_context
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
194
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
195 .global z80_read_word
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Mike Pavone <pavone@retrodev.com>
parents:
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196 z80_read_word:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
197 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
198 push %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
199 call z80_read_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
200 mov %r13b, %r14b
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
201 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
202 inc %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
203 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
204 call z80_read_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
205 shl $8, %r13w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
206 mov %r14b, %r13b
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
207 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
208
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
209 .global z80_write_word_highfirst
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
210 z80_write_word_highfirst:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
211 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
212 push %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
213 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
214 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
215 shr $8, %r13w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
216 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
217 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
218 pop %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
219 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
220 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
221 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
222
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
223 .global z80_write_word_lowfirst
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
224 z80_write_word_lowfirst:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
225 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
226 push %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
227 push %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
228 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
229 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
230 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
231 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
232 shr $8, %r13w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
233 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
234 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
235 ret
284
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
236
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
237 .global z80_io_read
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
238 z80_io_read:
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
239 call z_inccycles_io
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
240 /* 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
241 mov $0xFF, %r13
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
242 ret
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
243
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
244 .global z80_io_write
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
245 z80_io_write:
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
246 call z_inccycles_io
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
247 /* 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
248 ret
451
b7c3b2d22858 Added support for saving savestates. Added gst savestate format test harness
Mike Pavone <pavone@retrodev.com>
parents: 393
diff changeset
249
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
250 .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
251 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
252 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
253 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
254 /* adjust for mov and call instructions */
393
30c250a41629 Fix address adjustement in z80_retrans_stub
Mike Pavone <pavone@retrodev.com>
parents: 390
diff changeset
255 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
256 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
257 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
258 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
259 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
260 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
261 mov %rax, %r13
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
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262 call z80_load_context
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263 jmp *%r13
249
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264
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265 .global z80_native_addr
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266 z80_native_addr:
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267 call z80_save_context
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268 push %rsi
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269 mov %rsi, %rdi
249
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270 movzx %r13w, %esi
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271 call z80_get_native_address_trans
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272 mov %rax, %r13
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273 pop %rsi
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274 call z80_load_context
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275 ret
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276
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277 z80_save_context_scratch:
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278 mov %r13w, 98(%rsi) /* scratch1 */
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279 mov %r14w, 100(%rsi) /* scratch2 */
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280
249
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281 .global z80_save_context
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282 z80_save_context:
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283 mov %r9w, 8(%rsi) /* SP */
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284 mov %r15w, 16(%rsi) /* bank register */
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285 mov %bx, 18(%rsi) /* BC */
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286 mov %cx, 20(%rsi) /* DE */
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287 mov %ax, 22(%rsi) /* HL */
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288 mov %dx, 24(%rsi) /* IX */
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289 mov %r8w, 26(%rsi) /* IY */
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290 mov %r10b, 30(%rsi) /* A */
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291 mov %edi, 48(%rsi) /* target_cycle */
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292 mov %ebp, 52(%rsi) /* current_cycle */
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293 mov %r12, 72(%rsi) /* cartridge bank pointer */
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294 ret
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295
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296
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297 z80_load_context_scratch:
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298 mov 98(%rsi), %r13w /* scratch1 */
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299 mov 100(%rsi), %r14w /* scratch2 */
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300
249
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301 .global z80_load_context
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302 z80_load_context:
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303 mov 8(%rsi), %r9w /* SP */
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304 mov 16(%rsi), %r15w /* bank register */
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305 mov 18(%rsi), %bx /* BC */
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306 mov 20(%rsi), %cx /* DE */
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307 mov 22(%rsi), %ax /* HL */
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308 mov 24(%rsi), %dx /* IX */
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309 mov 26(%rsi), %r8w /* IY */
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310 mov 30(%rsi), %r10b /* A */
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311 mov 48(%rsi), %edi /* target_cycle */
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312 mov 52(%rsi), %ebp /* current_cycle */
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313 mov 64(%rsi), %r11 /* z80 RAM */
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314 mov 72(%rsi), %r12 /* cartridge bank pointer */
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315 ret
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316
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317 .global z80_run
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318 z80_run:
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319 push %rbx
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320 push %rbp
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321 push %r12
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322 push %r13
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323 push %r14
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324 push %r15
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325 mov %rdi, %rsi
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326 call z80_load_context_scratch
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327 cmpq $0, 104(%rsi)
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328 je no_extra
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329 push 104(%rsi)
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330 movq $0, 104(%rsi)
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331 no_extra:
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332 jmp *(%rsi)
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diff changeset
333