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annotate zruntime.S @ 345:29d2ca563499

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Don't sync the 68K clock to the VDP clock unless the 68K had to wait for the VDP. This unfortunately breaks the direct color DMA demos, but should be more correct overall.
author Mike Pavone <pavone@retrodev.com>
date Sun, 19 May 2013 13:47:47 -0700
parents 14a937097c2b
children fa7ea48be9a9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
284
ed7098f717d7 Implement IN and OUT (untested)
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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
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21 sync_io:
249
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22 call z80_save_context_scratch
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23 pop %rax /*return address in read/write func*/
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24 pop 104(%rsi) /*return address in native code*/
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25 sub $5, %rax /* adjust return addres to point to the call instruction that got us here */
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26 mov %rax, (%rsi)
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27
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28 pop %r15 /* restore callee saved regsiters */
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29 pop %r14
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30 pop %r13
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31 pop %r12
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32 pop %rbp
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33 pop %rbx
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34 ret /* return to caller of z80_run */
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35
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36 .global z80_handle_cycle_limit_int
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37 z80_handle_cycle_limit_int:
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38 cmp 116(%rsi), %ebp
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39 jb zskip_int
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40 mov 112(%rsi), %ebp /* set cycle limit to sync cycle */
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14a937097c2b Some Z80 interrupt fixes
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41 movl $0xFFFFFFFF, 116(%rsi) /* make sure the interrupt doesn't fire more than once */
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42 add $7, %ebp
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43 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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44 mov %r9w, %r14w
249
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45 call z_inccycles
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46 push %r13
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47 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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48 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.
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49 mov %r9w, %r14w
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50 add $1, %r14w
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51 shr $8, %r13w
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52 call z_inccycles
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53 call z80_write_byte_noinc
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eec7072189a1 Fix crash bug in Z80 interrupt support
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54 pop %r14 /*dispose of return address */
249
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55 /* TODO: Support interrupt mode 0 and 2 */
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56 mov $0x38, %r13w
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57 call z80_native_addr
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58 jmp *%r13
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59 zskip_int:
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60 cmp 112(%rsi), %ebp
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61 jb zskip_sync
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62 .global z80_do_sync
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63 z80_do_sync:
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64 call z80_save_context
249
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65 pop (%rsi) /*return address in native code*/
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66 pop %r15 /* restore callee saved regsiters */
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67 pop %r14
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68 pop %r13
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69 pop %r12
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70 pop %rbp
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71 pop %rbx
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72 zskip_sync:
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73 ret
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74
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021aeb6df19b Implement HALT (sort of tested)
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75 .global z80_halt
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76 z80_halt:
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77 mov %edi, %r14d
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78 sub %ebp, %r14d
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79 and $0xFFFFFFFC, %r14d
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80 add %r14d, %ebp
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81 cmp %edi, %ebp
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82 jnb z80_handle_cycle_limit_int
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83 add $4, %ebp
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84 jmp z80_handle_cycle_limit_int
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85
249
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86 .global z80_read_byte
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87 z80_read_byte:
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88 call z_inccycles
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89 z80_read_byte_noinc:
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90 cmp $0x4000, %r13w
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91 jb z80_read_ram
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92 cmp $0x8000, %r13w
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93 jae z80_read_bank
290
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94 cmp $0x6000, %r13w
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95 jb z80_read_ym2612
249
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96 /* TODO: Bank reg, YM-2612, PSG/VDP */
280
9ee64039ddeb Fix bank register update
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97 mov $0xFF, %r13b
249
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98 ret
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99 z80_read_ram:
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100 and $0x1FFF, %r13
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101 mov (%r11, %r13), %r13b
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102 ret
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103 z80_read_bank:
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104 and $0x7FFF, %r13
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105 cmp $0, %r12
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106 je slow_bank_read
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107 /* 68K memory is byte swapped */
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108 xor $1, %r13
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109 mov (%r12, %r13), %r13b
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110 ret
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111 slow_bank_read:
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112 /* TODO: Call into C to implement this */
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113 ret
290
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114 z80_read_ym2612:
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115 call z80_save_context
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116 mov %r13w, %di
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117 push %rsi
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118 call z80_read_ym
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119 pop %rsi
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120 mov %al, %r13b
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121 call z80_load_context
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122 ret
249
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123
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124 .global z80_write_byte
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125 z80_write_byte:
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126 call z_inccycles
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127 z80_write_byte_noinc:
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
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128 cmp $0x4000, %r14w
249
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129 jb z80_write_ram
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
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130 cmp $0x8000, %r14w
249
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131 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
132 cmp $0x6000, %r14w
290
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
133 jb z80_write_ym2612
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
134 cmp $0x6100, %r14w
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
135 jb z80_write_bank_reg
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
136 /* TODO: YM-2612, PSG/VDP */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
137 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
138 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
139 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
140 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
141 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
142 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
143 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
144 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
145 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
146 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
147 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
148 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
149 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
150 not_code:
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
151 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
152 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
153 and $0x7FFF, %r14
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
154 cmp $0, %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
155 je slow_bank_write
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
156 /* 68K memory is byte swapped */
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
157 xor $1, %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
158 mov %r13b, (%r12, %r14)
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
159 ret
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
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
170 call z80_load_context
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
171 ret
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
172 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
173 and $1, %r13w
280
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
174 shr %r15w
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
175 shl $8, %r13w
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
176 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
177 or %r13w, %r15w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
178 and $0x1FF, %r15w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
179 cmp $0x80, %r15w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
180 jb update_bank_ptr
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 update_bank_ptr:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
183 mov %r15w, %r12w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
184 shl $15, %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
185 add 80(%rsi), %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
186 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
187
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
188 .global z80_read_word
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
189 z80_read_word:
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
190 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
191 push %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
192 call z80_read_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
193 mov %r13b, %r14b
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
194 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
195 inc %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
196 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
197 call z80_read_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
198 shl $8, %r13w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
199 mov %r14b, %r13b
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
200 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
201
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
202 .global z80_write_word_highfirst
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
203 z80_write_word_highfirst:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
204 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
205 push %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
206 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
207 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
208 shr $8, %r13w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
209 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
210 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
211 pop %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
212 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
213 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
214 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
215
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
216 .global z80_write_word_lowfirst
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
217 z80_write_word_lowfirst:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
218 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
219 push %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
220 push %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
221 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
222 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
223 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
224 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
225 shr $8, %r13w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
226 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
227 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
228 ret
284
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
229
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
230 .global z80_io_read
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
231 z80_io_read:
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
232 call z_inccycles_io
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
233 /* 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
234 mov $0xFF, %r13
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
235 ret
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_write
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
238 z80_io_write:
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 writes have no effect */
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
241 ret
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
242
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
243 .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
244 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
245 call z80_save_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
246 mov %r13d, %edi
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
247 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
248 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
249 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
250 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
251 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
252 jmp *%r13
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
253
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
254 .global z80_native_addr
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
255 z80_native_addr:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
256 call z80_save_context
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
257 push %rsi
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
258 mov %rsi, %rdi
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
259 movzx %r13w, %esi
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
260 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
261 mov %rax, %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
262 pop %rsi
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263 call z80_load_context
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264 ret
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265
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266 z80_save_context_scratch:
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267 mov %r13w, 98(%rsi) /* scratch1 */
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268 mov %r14w, 100(%rsi) /* scratch2 */
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269
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270 .global z80_save_context
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271 z80_save_context:
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272 mov %r9w, 8(%rsi) /* SP */
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273 mov %r15w, 16(%rsi) /* bank register */
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274 mov %bx, 18(%rsi) /* BC */
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275 mov %cx, 20(%rsi) /* DE */
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276 mov %ax, 22(%rsi) /* HL */
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277 mov %dx, 24(%rsi) /* IX */
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278 mov %r8w, 26(%rsi) /* IY */
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279 mov %r10b, 30(%rsi) /* A */
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280 mov %edi, 48(%rsi) /* target_cycle */
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281 mov %ebp, 52(%rsi) /* current_cycle */
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282 mov %r12, 72(%rsi) /* cartridge bank pointer */
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283 ret
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284
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285
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286 z80_load_context_scratch:
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287 mov 98(%rsi), %r13w /* scratch1 */
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288 mov 100(%rsi), %r14w /* scratch2 */
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289
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290 .global z80_load_context
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291 z80_load_context:
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292 mov 8(%rsi), %r9w /* SP */
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293 mov 16(%rsi), %r15w /* bank register */
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294 mov 18(%rsi), %bx /* BC */
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295 mov 20(%rsi), %cx /* DE */
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parents:
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296 mov 22(%rsi), %ax /* HL */
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parents:
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297 mov 24(%rsi), %dx /* IX */
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298 mov 26(%rsi), %r8w /* IY */
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299 mov 30(%rsi), %r10b /* A */
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300 mov 48(%rsi), %edi /* target_cycle */
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parents:
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301 mov 52(%rsi), %ebp /* current_cycle */
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parents:
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302 mov 64(%rsi), %r11 /* z80 RAM */
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parents:
diff changeset
303 mov 72(%rsi), %r12 /* cartridge bank pointer */
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parents:
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304 ret
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parents:
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305
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306 .global z80_run
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307 z80_run:
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308 push %rbx
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309 push %rbp
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310 push %r12
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311 push %r13
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312 push %r14
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313 push %r15
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314 mov %rdi, %rsi
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315 call z80_load_context_scratch
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316 cmpq $0, 104(%rsi)
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317 je no_extra
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318 push 104(%rsi)
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319 movq $0, 104(%rsi)
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320 no_extra:
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321 jmp *(%rsi)
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parents:
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322