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comparison m68k_util.c @ 2590:e602dbf776d8

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Fix abcd and implement sbcd and nbcd in new 68K core
author Michael Pavone <pavone@retrodev.com>
date Sun, 09 Feb 2025 02:57:37 -0800
parents e04c7e753bf6
children 1c493b8c513b
comparison
equal deleted inserted replaced
2589:6bca3c28e2ad 2590:e602dbf776d8
4 { 4 {
5 context->cycles += 4 * context->opts->gen.clock_divider; 5 context->cycles += 4 * context->opts->gen.clock_divider;
6 context->scratch1 = read_byte(context->scratch1, context->mem_pointers, &context->opts->gen, context); 6 context->scratch1 = read_byte(context->scratch1, context->mem_pointers, &context->opts->gen, context);
7 } 7 }
8 8
9 #ifdef DEBUG_DISASM
10 #include "68kinst.h"
11 static uint16_t debug_disasm_fetch(uint32_t address, void *vcontext)
12 {
13 m68k_context *context = vcontext;
14 return read_word(address, context->mem_pointers, &context->opts->gen, context);
15 }
16 #endif
9 void m68k_read_16(m68k_context *context) 17 void m68k_read_16(m68k_context *context)
10 { 18 {
11 context->cycles += 4 * context->opts->gen.clock_divider; 19 context->cycles += 4 * context->opts->gen.clock_divider;
20 #ifdef DEBUG_DISASM
12 uint32_t tmp = context->scratch1; 21 uint32_t tmp = context->scratch1;
22 #endif
13 context->scratch1 = read_word(context->scratch1, context->mem_pointers, &context->opts->gen, context); 23 context->scratch1 = read_word(context->scratch1, context->mem_pointers, &context->opts->gen, context);
24 #ifdef DEBUG_DISASM
25 if (tmp == context->pc) {
26 m68kinst inst;
27 m68k_decode(debug_disasm_fetch, context, &inst, tmp);
28 static char disasm_buf[256];
29 m68k_disasm(&inst, disasm_buf);
30 printf("Fetch %05X: %04X - %s, d2 = %X, d3 = %X, d4 = %X, d6 = %X, xflag = %d\n", tmp, context->scratch1, disasm_buf, context->dregs[2], context->dregs[3], context->dregs[4], context->dregs[6], context->xflag);
31 }
32 #endif
14 } 33 }
15 34
16 void m68k_write_8(m68k_context *context) 35 void m68k_write_8(m68k_context *context)
17 { 36 {
18 context->cycles += 4 * context->opts->gen.clock_divider; 37 context->cycles += 4 * context->opts->gen.clock_divider;