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Z80 core is sort of working again
author Michael Pavone <pavone@retrodev.com>
date Mon, 22 Dec 2014 20:55:10 -0800
parents 140af5509ce7
children f838bc0aeb7c
comparison
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592:4ff7bbb3943b 593:5ef3fe516da9
1 /* 1 /*
2 Copyright 2013 Michael Pavone 2 Copyright 2013 Michael Pavone
3 This file is part of BlastEm. 3 This file is part of BlastEm.
4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. 4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
5 */ 5 */
6 #include "z80inst.h" 6 #include "z80inst.h"
7 #include "z80_to_x86.h" 7 #include "z80_to_x86.h"
8 #include "mem.h" 8 #include "mem.h"
9 #include "vdp.h" 9 #include "vdp.h"
10 #include <stdio.h> 10 #include <stdio.h>
11 #include <stdlib.h> 11 #include <stdlib.h>
12 12
13 uint8_t z80_ram[0x2000]; 13 uint8_t z80_ram[0x2000];
14 uint16_t cart[0x200000];
15 14
16 #define MCLKS_PER_Z80 15 15 #define MCLKS_PER_Z80 15
17 //TODO: Figure out the exact value for this 16 //TODO: Figure out the exact value for this
18 #define MCLKS_PER_FRAME (MCLKS_LINE*262) 17 #define MCLKS_PER_FRAME (MCLKS_LINE*262)
19 #define VINT_CYCLE ((MCLKS_LINE * 226)/MCLKS_PER_Z80) 18 #define VINT_CYCLE ((MCLKS_LINE * 226)/MCLKS_PER_Z80)
20 #define CYCLE_NEVER 0xFFFFFFFF 19 #define CYCLE_NEVER 0xFFFFFFFF
21 20
22 uint8_t z80_read_ym(uint16_t location, z80_context * context) 21 uint8_t z80_unmapped_read(uint32_t location, void * context)
23 { 22 {
24 return 0xFF; 23 return 0xFF;
25 } 24 }
26 25
27 z80_context * z80_write_ym(uint16_t location, z80_context * context, uint8_t value) 26 void * z80_unmapped_write(uint32_t location, void * context, uint8_t value)
28 { 27 {
29 return context; 28 return context;
30 } 29 }
31 30
32 z80_context * z80_vdp_port_write(uint16_t location, z80_context * context, uint8_t value) 31 const memmap_chunk z80_map[] = {
33 { 32 { 0x0000, 0x4000, 0x1FFF, 0, MMAP_READ | MMAP_WRITE | MMAP_CODE, z80_ram, NULL, NULL, NULL, NULL },
34 return context; 33 { 0x4000, 0x10000, 0xFFFF, 0, MMAP_READ | MMAP_WRITE, NULL, NULL, NULL, z80_unmapped_read, z80_unmapped_write}
35 } 34 };
36 35
37 int main(int argc, char ** argv) 36 int main(int argc, char ** argv)
38 { 37 {
39 long filesize; 38 long filesize;
40 uint8_t *filebuf; 39 uint8_t *filebuf;
41 x86_z80_options opts; 40 z80_options opts;
42 z80_context context; 41 z80_context context;
43 if (argc < 2) { 42 if (argc < 2) {
44 fputs("usage: transz80 zrom [cartrom]\n", stderr); 43 fputs("usage: transz80 zrom [cartrom]\n", stderr);
45 exit(1); 44 exit(1);
46 } 45 }
52 fseek(f, 0, SEEK_END); 51 fseek(f, 0, SEEK_END);
53 filesize = ftell(f); 52 filesize = ftell(f);
54 fseek(f, 0, SEEK_SET); 53 fseek(f, 0, SEEK_SET);
55 fread(z80_ram, 1, filesize < sizeof(z80_ram) ? filesize : sizeof(z80_ram), f); 54 fread(z80_ram, 1, filesize < sizeof(z80_ram) ? filesize : sizeof(z80_ram), f);
56 fclose(f); 55 fclose(f);
57 if (argc > 2) { 56 init_x86_z80_opts(&opts, z80_map, 2);
58 f = fopen(argv[2], "rb");
59 if (!f) {
60 fprintf(stderr, "unable to open file %s\n", argv[2]);
61 exit(1);
62 }
63 fseek(f, 0, SEEK_END);
64 filesize = ftell(f);
65 fseek(f, 0, SEEK_SET);
66 fread(cart, 1, filesize < sizeof(cart) ? filesize : sizeof(cart), f);
67 fclose(f);
68 for(unsigned short * cur = cart; cur - cart < (filesize/2); ++cur)
69 {
70 *cur = (*cur >> 8) | (*cur << 8);
71 }
72 }
73 init_x86_z80_opts(&opts);
74 init_z80_context(&context, &opts); 57 init_z80_context(&context, &opts);
75 //Z80 RAM 58 //Z80 RAM
76 context.mem_pointers[0] = z80_ram; 59 context.mem_pointers[0] = z80_ram;
77 context.sync_cycle = context.target_cycle = 1000; 60 context.sync_cycle = context.target_cycle = 1000;
78 context.int_cycle = CYCLE_NEVER; 61 context.int_cycle = CYCLE_NEVER;
79 //cartridge/bank
80 context.mem_pointers[1] = context.mem_pointers[2] = (uint8_t *)cart;
81 z80_reset(&context); 62 z80_reset(&context);
82 while (context.current_cycle < 1000) { 63 while (context.current_cycle < 1000) {
83 z80_run(&context); 64 context.run(&context);
84 } 65 }
85 printf("A: %X\nB: %X\nC: %X\nD: %X\nE: %X\nHL: %X\nIX: %X\nIY: %X\nSP: %X\n\nIM: %d, IFF1: %d, IFF2: %d\n", 66 printf("A: %X\nB: %X\nC: %X\nD: %X\nE: %X\nHL: %X\nIX: %X\nIY: %X\nSP: %X\n\nIM: %d, IFF1: %d, IFF2: %d\n",
86 context.regs[Z80_A], context.regs[Z80_B], context.regs[Z80_C], 67 context.regs[Z80_A], context.regs[Z80_B], context.regs[Z80_C],
87 context.regs[Z80_D], context.regs[Z80_E], 68 context.regs[Z80_D], context.regs[Z80_E],
88 (context.regs[Z80_H] << 8) | context.regs[Z80_L], 69 (context.regs[Z80_H] << 8) | context.regs[Z80_L],
89 (context.regs[Z80_IXH] << 8) | context.regs[Z80_IXL], 70 (context.regs[Z80_IXH] << 8) | context.regs[Z80_IXL],
90 (context.regs[Z80_IYH] << 8) | context.regs[Z80_IYL], 71 (context.regs[Z80_IYH] << 8) | context.regs[Z80_IYL],
91 context.sp, context.im, context.iff1, context.iff2); 72 context.sp, context.im, context.iff1, context.iff2);
92 printf("Flags: SZVNC\n" 73 printf("Flags: SZVNC\n"
93 " %d%d%d%d%d\n", context.flags[ZF_S], context.flags[ZF_Z], context.flags[ZF_PV], context.flags[ZF_N], context.flags[ZF_C]); 74 " %d%d%d%d%d\n", context.flags[ZF_S], context.flags[ZF_Z], context.flags[ZF_PV], context.flags[ZF_N], context.flags[ZF_C]);
94 puts("--Alternate Regs--"); 75 puts("--Alternate Regs--");
95 printf("A: %X\nB: %X\nC: %X\nD: %X\nE: %X\nHL: %X\n", 76 printf("A: %X\nB: %X\nC: %X\nD: %X\nE: %X\nHL: %X\n",
96 context.alt_regs[Z80_A], context.alt_regs[Z80_B], context.alt_regs[Z80_C], 77 context.alt_regs[Z80_A], context.alt_regs[Z80_B], context.alt_regs[Z80_C],
97 context.alt_regs[Z80_D], context.alt_regs[Z80_E], 78 context.alt_regs[Z80_D], context.alt_regs[Z80_E],
98 (context.alt_regs[Z80_H] << 8) | context.alt_regs[Z80_L]); 79 (context.alt_regs[Z80_H] << 8) | context.alt_regs[Z80_L]);
99 return 0; 80 return 0;
100 } 81 }