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working on debug menu

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This commit is contained in:
Samuel Walker
2025-05-30 18:27:31 -06:00
parent bb572cce69
commit 604a6d79f2
10 changed files with 251 additions and 126 deletions
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23
lib/cpu.c
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@ -7,7 +7,7 @@
#include <timer.h>
#include <memory.h>
cpu_context ctx = {0};
static cpu_context ctx = {0};
#define CPU_DEBUG 1
#define FILE_LOG 0
@ -37,9 +37,9 @@ void cpu_init() {
#endif
}
static void fetch_instruction() {
ctx.cur_opcode = bus_read(ctx.regs.pc++);
ctx.cur_inst = instruction_by_opcode(ctx.cur_opcode);
void fetch_instruction(cpu_context *ctx) {
ctx->cur_opcode = bus_read(ctx->regs.pc++);
ctx->cur_inst = instruction_by_opcode(ctx->cur_opcode);
}
static void execute() {
@ -57,15 +57,26 @@ bool cpu_step() {
if(!ctx.halted) {
u16 pc = ctx.regs.pc;
fetch_instruction();
ctx.inst_pc = pc;
fetch_instruction(&ctx);
emu_cycles(1);
#if FILE_LOG == 1
fprintf(log, "A:%02X F:%02X B:%02X C:%02X D:%02X E:%02X H:%02X L:%02X SP:%04X PC:%04X PCMEM:%02X,%02X,%02X,%02X\n",
ctx.regs.a, ctx.regs.f, ctx.regs.b, ctx.regs.c, ctx.regs.d, ctx.regs.e, ctx.regs.h, ctx.regs.l, ctx.regs.sp, pc,
bus_read(pc), bus_read(pc+1), bus_read(pc+2), bus_read(pc+3)
);
#endif
fetch_data();
fetch_data(&ctx);
while(emu_get_context()->paused && !emu_get_context()->step)
delay(10);
if(emu_get_context()->paused) {
emu_get_context()->step--;
if(emu_get_context()->step == 0) {
printf("debug!\n");
emu_get_context()->debug = true;
}
}
#if CPU_DEBUG == 1
char flags[16];
sprintf(flags, "%c%c%c%c",