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annotate zruntime.S @ 380:1c8d74f2ab0b

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Make the PSG and YM2612 use the master clock internal with an increment based on clock divider so that they stay perflectly in sync. Run both the PSG and YM2612 whenver one of them needs to be run.
author Mike Pavone <pavone@retrodev.com>
date Mon, 03 Jun 2013 21:43:38 -0700
parents 134ffb72d7a1
children 561fe3ea3fc8
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
284
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21 sync_io:
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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 */
375
134ffb72d7a1 Clear IFF1 and IFF2 when an interrupt is taken on the Z80
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41 /* not sure this is really necessary now that IFF1 and IFF2 are geting cleared */
335
14a937097c2b Some Z80 interrupt fixes
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42 movl $0xFFFFFFFF, 116(%rsi) /* make sure the interrupt doesn't fire more than once */
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43 /* disable interrupts */
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44 movb $0, 96(%rsi)
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45 movb $0, 97(%rsi)
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46 add $7, %ebp
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47 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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48 mov %r9w, %r14w
249
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49 call z_inccycles
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50 push %r13
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51 call z80_write_byte_noinc
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52 pop %r13
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53 mov %r9w, %r14w
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54 add $1, %r14w
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55 shr $8, %r13w
249
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56 call z_inccycles
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57 call z80_write_byte_noinc
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eec7072189a1 Fix crash bug in Z80 interrupt support
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58 pop %r14 /*dispose of return address */
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59 /* TODO: Support interrupt mode 0 and 2 */
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60 mov $0x38, %r13w
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61 call z80_native_addr
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62 jmp *%r13
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63 zskip_int:
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64 cmp 112(%rsi), %ebp
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65 jb zskip_sync
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66 .global z80_do_sync
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67 z80_do_sync:
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68 call z80_save_context
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69 pop (%rsi) /*return address in native code*/
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70 pop %r15 /* restore callee saved regsiters */
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71 pop %r14
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72 pop %r13
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73 pop %r12
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74 pop %rbp
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75 pop %rbx
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76 zskip_sync:
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77 ret
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78
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79 .global z80_halt
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80 z80_halt:
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81 mov %edi, %r14d
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82 sub %ebp, %r14d
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83 and $0xFFFFFFFC, %r14d
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84 add %r14d, %ebp
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85 cmp %edi, %ebp
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86 jnb z80_handle_cycle_limit_int
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87 add $4, %ebp
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88 jmp z80_handle_cycle_limit_int
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89
249
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90 .global z80_read_byte
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91 z80_read_byte:
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92 call z_inccycles
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93 z80_read_byte_noinc:
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94 cmp $0x4000, %r13w
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95 jb z80_read_ram
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96 cmp $0x8000, %r13w
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97 jae z80_read_bank
290
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98 cmp $0x6000, %r13w
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99 jb z80_read_ym2612
249
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100 /* TODO: Bank reg, YM-2612, PSG/VDP */
280
9ee64039ddeb Fix bank register update
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101 mov $0xFF, %r13b
249
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102 ret
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103 z80_read_ram:
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104 and $0x1FFF, %r13
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105 mov (%r11, %r13), %r13b
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106 ret
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107 z80_read_bank:
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108 and $0x7FFF, %r13
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109 cmp $0, %r12
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110 je slow_bank_read
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111 /* 68K memory is byte swapped */
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112 xor $1, %r13
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113 mov (%r12, %r13), %r13b
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114 ret
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115 slow_bank_read:
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116 /* TODO: Call into C to implement this */
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117 ret
290
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118 z80_read_ym2612:
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119 call z80_save_context
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120 mov %r13w, %di
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121 push %rsi
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122 call z80_read_ym
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123 pop %rsi
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124 mov %al, %r13b
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125 call z80_load_context
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126 ret
249
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127
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128 .global z80_write_byte
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129 z80_write_byte:
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130 call z_inccycles
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parents:
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131 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
132 cmp $0x4000, %r14w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
133 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
134 cmp $0x8000, %r14w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
135 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
136 cmp $0x6000, %r14w
290
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
137 jb z80_write_ym2612
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
138 cmp $0x6100, %r14w
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
139 jb z80_write_bank_reg
357
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
140 cmp $0x7F00, %r14w
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
141 jae z80_write_vdp
249
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
142 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
143 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
144 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
145 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
146 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
147 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
148 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
149 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
150 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
151 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
152 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
153 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
154 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
155 not_code:
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
156 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
157 z80_write_bank:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
158 slow_bank_write:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
159 /* TODO: Call into C to implement this */
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
160 ret
290
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
161 z80_write_ym2612:
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
162 and $0x3, %r14w
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
163 call z80_save_context
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
164 mov %r14w, %di
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
165 mov %r13b, %dl
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
166 call z80_write_ym
171f97e70d85 Implement writes from Z80 to YM-2612
Mike Pavone <pavone@retrodev.com>
parents: 285
diff changeset
167 mov %rax, %rsi
357
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
168 jmp z80_load_context
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
169 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
170 and $1, %r13w
280
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
171 shr %r15w
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
172 shl $8, %r13w
9ee64039ddeb Fix bank register update
Mike Pavone <pavone@retrodev.com>
parents: 279
diff changeset
173 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
174 or %r13w, %r15w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
175 and $0x1FF, %r15w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
176 cmp $0x80, %r15w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
177 jb update_bank_ptr
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
178 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
179 update_bank_ptr:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
180 mov %r15w, %r12w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
181 shl $15, %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
182 add 80(%rsi), %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
183 ret
357
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
184 z80_write_vdp:
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
185 and $0xFF, %r14w
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
186 call z80_save_context
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
187 mov %r14w, %di
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
188 mov %r13b, %dl
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
189 call z80_vdp_port_write
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
190 mov %rax, %rsi
fa7ea48be9a9 Allow VDP/PSG writes from Z80
Mike Pavone <pavone@retrodev.com>
parents: 335
diff changeset
191 jmp z80_load_context
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
192
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
193 .global z80_read_word
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Mike Pavone <pavone@retrodev.com>
parents:
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194 z80_read_word:
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
195 call z_inccycles
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
196 push %r13
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 mov %r13b, %r14b
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
199 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
200 inc %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
201 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
202 call z80_read_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
203 shl $8, %r13w
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
204 mov %r14b, %r13b
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
205 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
206
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
207 .global z80_write_word_highfirst
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
208 z80_write_word_highfirst:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
209 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
210 push %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
211 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
212 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
213 shr $8, %r13w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
214 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
215 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
216 pop %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
217 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
218 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
219 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
220
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
221 .global z80_write_word_lowfirst
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
222 z80_write_word_lowfirst:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
223 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
224 push %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
225 push %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
226 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
227 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
228 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
229 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
230 shr $8, %r13w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
231 call z_inccycles
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
232 call z80_write_byte_noinc
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
233 ret
284
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
234
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
235 .global z80_io_read
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
236 z80_io_read:
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
237 call z_inccycles_io
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
238 /* 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
239 mov $0xFF, %r13
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
240 ret
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
241
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
242 .global z80_io_write
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
243 z80_io_write:
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
244 call z_inccycles_io
ed7098f717d7 Implement IN and OUT (untested)
Mike Pavone <pavone@retrodev.com>
parents: 281
diff changeset
245 /* 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
246 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
247
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 .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
249 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
250 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
251 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
252 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
253 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
254 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
255 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
256 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
257 jmp *%r13
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
258
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
259 .global z80_native_addr
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
260 z80_native_addr:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
261 call z80_save_context
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
262 push %rsi
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
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263 mov %rsi, %rdi
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parents:
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264 movzx %r13w, %esi
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265 call z80_get_native_address_trans
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266 mov %rax, %r13
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Mike Pavone <pavone@retrodev.com>
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267 pop %rsi
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268 call z80_load_context
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269 ret
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parents:
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270
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271 z80_save_context_scratch:
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272 mov %r13w, 98(%rsi) /* scratch1 */
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parents:
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273 mov %r14w, 100(%rsi) /* scratch2 */
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parents:
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274
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275 .global z80_save_context
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276 z80_save_context:
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parents:
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277 mov %r9w, 8(%rsi) /* SP */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
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278 mov %r15w, 16(%rsi) /* bank register */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
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279 mov %bx, 18(%rsi) /* BC */
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parents:
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280 mov %cx, 20(%rsi) /* DE */
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parents:
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281 mov %ax, 22(%rsi) /* HL */
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parents:
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282 mov %dx, 24(%rsi) /* IX */
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
283 mov %r8w, 26(%rsi) /* IY */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
284 mov %r10b, 30(%rsi) /* A */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
285 mov %edi, 48(%rsi) /* target_cycle */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
286 mov %ebp, 52(%rsi) /* current_cycle */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
287 mov %r12, 72(%rsi) /* cartridge bank pointer */
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Mike Pavone <pavone@retrodev.com>
parents:
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288 ret
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parents:
diff changeset
289
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
290
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Mike Pavone <pavone@retrodev.com>
parents:
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291 z80_load_context_scratch:
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
292 mov 98(%rsi), %r13w /* scratch1 */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
293 mov 100(%rsi), %r14w /* scratch2 */
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parents:
diff changeset
294
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parents:
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295 .global z80_load_context
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296 z80_load_context:
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parents:
diff changeset
297 mov 8(%rsi), %r9w /* SP */
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parents:
diff changeset
298 mov 16(%rsi), %r15w /* bank register */
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parents:
diff changeset
299 mov 18(%rsi), %bx /* BC */
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parents:
diff changeset
300 mov 20(%rsi), %cx /* DE */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
301 mov 22(%rsi), %ax /* HL */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
302 mov 24(%rsi), %dx /* IX */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
303 mov 26(%rsi), %r8w /* IY */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
304 mov 30(%rsi), %r10b /* A */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
305 mov 48(%rsi), %edi /* target_cycle */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
306 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
307 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
308 mov 72(%rsi), %r12 /* cartridge bank pointer */
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
309 ret
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parents:
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310
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parents:
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311 .global z80_run
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parents:
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312 z80_run:
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parents:
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313 push %rbx
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
314 push %rbp
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parents:
diff changeset
315 push %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
316 push %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
317 push %r14
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
318 push %r15
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
319 mov %rdi, %rsi
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
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320 call z80_load_context_scratch
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parents:
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321 cmpq $0, 104(%rsi)
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
322 je no_extra
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Mike Pavone <pavone@retrodev.com>
parents:
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323 push 104(%rsi)
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
324 movq $0, 104(%rsi)
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
325 no_extra:
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Mike Pavone <pavone@retrodev.com>
parents:
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326 jmp *(%rsi)
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
327