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Initial attempt at interrupts in new Z80 core and integrating it into main executable
author Michael Pavone <pavone@retrodev.com>
date Sun, 10 Feb 2019 11:58:23 -0800
parents 01236179fc71
children 33ec5df77fac
comparison
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1751:c5d4e1d14dac 1752:d6d4c006a7b3
1 info 1 info
2 prefix z80_ 2 prefix z80_
3 opcode_size 8 3 opcode_size 8
4 extra_tables cb ed dded fded ddcb fdcb dd fd 4 extra_tables cb ed dded fded ddcb fdcb dd fd
5 body z80_run_op 5 body z80_run_op
6 sync_cycle z80_sync_cycle
7 interrupt z80_interrupt
6 include z80_util.c 8 include z80_util.c
7 header z80.h 9 header z80.h
8 10
9 declare 11 declare
10 void init_z80_opts(z80_options * options, memmap_chunk const * chunks, uint32_t num_chunks, memmap_chunk const * io_chunks, uint32_t num_io_chunks, uint32_t clock_divider, uint32_t io_address_mask); 12 void init_z80_opts(z80_options * options, memmap_chunk const * chunks, uint32_t num_chunks, memmap_chunk const * io_chunks, uint32_t num_io_chunks, uint32_t clock_divider, uint32_t io_address_mask);
11 z80_context * init_z80_context(z80_options *options); 13 z80_context * init_z80_context(z80_options *options);
12 14 void z80_run(z80_context *context, uint32_t target_cycle);
15 void z80_assert_reset(z80_context * context, uint32_t cycle);
16 void z80_clear_reset(z80_context * context, uint32_t cycle);
17 void z80_assert_busreq(z80_context * context, uint32_t cycle);
18 void z80_clear_busreq(z80_context * context, uint32_t cycle);
19 void z80_assert_nmi(z80_context *context, uint32_t cycle);
20 uint8_t z80_get_busack(z80_context * context, uint32_t cycle);
21 void z80_invalidate_code_range(z80_context *context, uint32_t start, uint32_t end);
22 void z80_adjust_cycles(z80_context * context, uint32_t deduction);
23 void z80_serialize(z80_context *context, serialize_buffer *buf);
24 void z80_deserialize(deserialize_buffer *buf, void *vcontext);
25 void zinsert_breakpoint(z80_context * context, uint16_t address, uint8_t * bp_handler);
26 void zremove_breakpoint(z80_context * context, uint16_t address);
27 void z80_options_free(z80_options *opts);
28
13 regs 29 regs
14 main 8 b c d e h l f a 30 main 8 b c d e h l f a
15 alt 8 b' c' d' e' h' l' f' a' 31 alt 8 b' c' d' e' h' l' f' a'
16 i 8 32 i 8
17 r 8 33 r 8
29 pvflag 8 45 pvflag 8
30 chflags 8 46 chflags 8
31 zflag 8 47 zflag 8
32 scratch1 16 48 scratch1 16
33 scratch2 16 49 scratch2 16
50 busreq 8
51 busack 8
52 reset 8
34 io_map ptrmemmap_chunk 53 io_map ptrmemmap_chunk
35 io_chunks 32 54 io_chunks 32
36 io_mask 32 55 io_mask 32
56 int_cycle 32
57 int_value 8
58 nmi_cycle 32
59 system ptrvoid
37 fastmem ptr8 64 60 fastmem ptr8 64
61 mem_pointers ptr8 4
38 62
39 flags 63 flags
40 register f 64 register f
41 S 7 sign last_flag_result.7 65 S 7 sign last_flag_result.7
42 Z 6 zero zflag 66 Z 6 zero zflag
57 add 1 pc pc 81 add 1 pc pc
58 82
59 z80_run_op 83 z80_run_op
60 z80_op_fetch 84 z80_op_fetch
61 dispatch scratch1 85 dispatch scratch1
86
87 z80_interrupt
88 cmp int_cycle cycles
89 if >=U
90
91 mov 0xFFFFFFFF int_cycle
92 mov 0 iff1
93 mov 0 iff2
94 cycles 6
95 update_sync
96
97 switch imode
98 case 0
99 dispatch int_value
100
101 case 1
102 dispatch 0xFF
103
104 case 2
105 lsl i 8 pc
106 or int_value pc pc
107 #CD is call
108 dispatch 0xCD
109 end
110
111 else
112
113 cmp nmi_cycle cycles
114 if >=U
115
116 mov 0xFFFFFFFF nmi_cycle
117 mov 0 iff1
118 local pch 8
119 lsr pc 8 pch
120 meta high pch
121 meta low pc
122 z80_push
123 mov 0x66 pc
124 update_sync
125
126 end
127 end
128
62 129
63 11001011 cb_prefix 130 11001011 cb_prefix
64 z80_op_fetch 131 z80_op_fetch
65 dispatch scratch1 cb 132 dispatch scratch1 cb
66 133
1483 1550
1484 ed 01D11110 im2 1551 ed 01D11110 im2
1485 mov 2 imode 1552 mov 2 imode
1486 1553
1487 ed 01D01110 im3 1554 ed 01D01110 im3
1488 mov 3 imode 1555 #some sources call this mode 0/1, but unclear
1556 #if the behavior is really different from im 0
1557 mov 0 imode
1489 1558
1490 11000011 jp 1559 11000011 jp
1491 z80_fetch_immed16 1560 z80_fetch_immed16
1492 mov wz pc 1561 mov wz pc
1493 1562