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-rw-r--r--blastem.c752
1 files changed, 0 insertions, 752 deletions
diff --git a/blastem.c b/blastem.c
index 847f777..ddf3fbc 100644
--- a/blastem.c
+++ b/blastem.c
@@ -848,758 +848,6 @@ m68k_context * write_bank_reg_b(uint32_t address, m68k_context * context, uint8_
return context;
}
-typedef struct bp_def {
- struct bp_def * next;
- uint32_t address;
- uint32_t index;
-} bp_def;
-
-bp_def * breakpoints = NULL;
-bp_def * zbreakpoints = NULL;
-uint32_t bp_index = 0;
-uint32_t zbp_index = 0;
-
-bp_def ** find_breakpoint(bp_def ** cur, uint32_t address)
-{
- while (*cur) {
- if ((*cur)->address == address) {
- break;
- }
- cur = &((*cur)->next);
- }
- return cur;
-}
-
-bp_def ** find_breakpoint_idx(bp_def ** cur, uint32_t index)
-{
- while (*cur) {
- if ((*cur)->index == index) {
- break;
- }
- cur = &((*cur)->next);
- }
- return cur;
-}
-
-typedef struct disp_def {
- struct disp_def * next;
- char * param;
- uint32_t index;
- char format_char;
-} disp_def;
-
-disp_def * displays = NULL;
-disp_def * zdisplays = NULL;
-uint32_t disp_index = 0;
-uint32_t zdisp_index = 0;
-
-void add_display(disp_def ** head, uint32_t *index, char format_char, char * param)
-{
- disp_def * ndisp = malloc(sizeof(*ndisp));
- ndisp->format_char = format_char;
- ndisp->param = strdup(param);
- ndisp->next = *head;
- ndisp->index = *index++;
- *head = ndisp;
-}
-
-void remove_display(disp_def ** head, uint32_t index)
-{
- while (*head) {
- if ((*head)->index == index) {
- disp_def * del_disp = *head;
- *head = del_disp->next;
- free(del_disp->param);
- free(del_disp);
- } else {
- head = &(*head)->next;
- }
- }
-}
-
-char * find_param(char * buf)
-{
- for (; *buf; buf++) {
- if (*buf == ' ') {
- if (*(buf+1)) {
- return buf+1;
- }
- }
- }
- return NULL;
-}
-
-void strip_nl(char * buf)
-{
- for(; *buf; buf++) {
- if (*buf == '\n') {
- *buf = 0;
- return;
- }
- }
-}
-
-void zdebugger_print(z80_context * context, char format_char, char * param)
-{
- uint32_t value;
- char format[8];
- strcpy(format, "%s: %d\n");
- switch (format_char)
- {
- case 'x':
- case 'X':
- case 'd':
- case 'c':
- format[5] = format_char;
- break;
- case '\0':
- break;
- default:
- fprintf(stderr, "Unrecognized format character: %c\n", format_char);
- }
- switch (param[0])
- {
- case 'a':
- if (param[1] == 'f') {
- if(param[2] == '\'') {
- value = context->alt_regs[Z80_A] << 8;
- value |= context->alt_flags[ZF_S] << 7;
- value |= context->alt_flags[ZF_Z] << 6;
- value |= context->alt_flags[ZF_H] << 4;
- value |= context->alt_flags[ZF_PV] << 2;
- value |= context->alt_flags[ZF_N] << 1;
- value |= context->alt_flags[ZF_C];
- } else {
- value = context->regs[Z80_A] << 8;
- value |= context->flags[ZF_S] << 7;
- value |= context->flags[ZF_Z] << 6;
- value |= context->flags[ZF_H] << 4;
- value |= context->flags[ZF_PV] << 2;
- value |= context->flags[ZF_N] << 1;
- value |= context->flags[ZF_C];
- }
- } else if(param[1] == '\'') {
- value = context->alt_regs[Z80_A];
- } else {
- value = context->regs[Z80_A];
- }
- break;
- case 'b':
- if (param[1] == 'c') {
- if(param[2] == '\'') {
- value = context->alt_regs[Z80_B] << 8;
- value |= context->alt_regs[Z80_C];
- } else {
- value = context->regs[Z80_B] << 8;
- value |= context->regs[Z80_C];
- }
- } else if(param[1] == '\'') {
- value = context->alt_regs[Z80_B];
- } else if(param[1] == 'a') {
- value = context->bank_reg << 15;
- } else {
- value = context->regs[Z80_B];
- }
- break;
- case 'c':
- if(param[1] == '\'') {
- value = context->alt_regs[Z80_C];
- } else if(param[1] == 'y') {
- value = context->current_cycle;
- } else {
- value = context->regs[Z80_C];
- }
- break;
- case 'd':
- if (param[1] == 'e') {
- if(param[2] == '\'') {
- value = context->alt_regs[Z80_D] << 8;
- value |= context->alt_regs[Z80_E];
- } else {
- value = context->regs[Z80_D] << 8;
- value |= context->regs[Z80_E];
- }
- } else if(param[1] == '\'') {
- value = context->alt_regs[Z80_D];
- } else {
- value = context->regs[Z80_D];
- }
- break;
- case 'e':
- if(param[1] == '\'') {
- value = context->alt_regs[Z80_E];
- } else {
- value = context->regs[Z80_E];
- }
- break;
- case 'f':
- if(param[2] == '\'') {
- value = context->alt_flags[ZF_S] << 7;
- value |= context->alt_flags[ZF_Z] << 6;
- value |= context->alt_flags[ZF_H] << 4;
- value |= context->alt_flags[ZF_PV] << 2;
- value |= context->alt_flags[ZF_N] << 1;
- value |= context->alt_flags[ZF_C];
- } else {
- value = context->flags[ZF_S] << 7;
- value |= context->flags[ZF_Z] << 6;
- value |= context->flags[ZF_H] << 4;
- value |= context->flags[ZF_PV] << 2;
- value |= context->flags[ZF_N] << 1;
- value |= context->flags[ZF_C];
- }
- break;
- case 'h':
- if (param[1] == 'l') {
- if(param[2] == '\'') {
- value = context->alt_regs[Z80_H] << 8;
- value |= context->alt_regs[Z80_L];
- } else {
- value = context->regs[Z80_H] << 8;
- value |= context->regs[Z80_L];
- }
- } else if(param[1] == '\'') {
- value = context->alt_regs[Z80_H];
- } else {
- value = context->regs[Z80_H];
- }
- break;
- case 'l':
- if(param[1] == '\'') {
- value = context->alt_regs[Z80_L];
- } else {
- value = context->regs[Z80_L];
- }
- break;
- case 'i':
- if(param[1] == 'x') {
- if (param[2] == 'h') {
- value = context->regs[Z80_IXH];
- } else if(param[2] == 'l') {
- value = context->regs[Z80_IXL];
- } else {
- value = context->regs[Z80_IXH] << 8;
- value |= context->regs[Z80_IXL];
- }
- } else if(param[1] == 'y') {
- if (param[2] == 'h') {
- value = context->regs[Z80_IYH];
- } else if(param[2] == 'l') {
- value = context->regs[Z80_IYL];
- } else {
- value = context->regs[Z80_IYH] << 8;
- value |= context->regs[Z80_IYL];
- }
- } else if(param[1] == 'n') {
- value = context->int_cycle;
- } else if(param[1] == 'f' && param[2] == 'f' && param[3] == '1') {
- value = context->iff1;
- } else if(param[1] == 'f' && param[2] == 'f' && param[3] == '2') {
- value = context->iff2;
- } else {
- value = context->im;
- }
- break;
- case 's':
- if (param[1] == 'p') {
- value = context->sp;
- }
- break;
- case '0':
- if (param[1] == 'x') {
- uint16_t p_addr = strtol(param+2, NULL, 16);
- if (p_addr < 0x4000) {
- value = z80_ram[p_addr & 0x1FFF];
- } else if(p_addr >= 0x8000) {
- uint32_t v_addr = context->bank_reg << 15;
- v_addr += p_addr & 0x7FFF;
- if (v_addr < 0x400000) {
- value = cart[v_addr/2];
- } else if(v_addr > 0xE00000) {
- value = ram[(v_addr & 0xFFFF)/2];
- }
- if (v_addr & 1) {
- value &= 0xFF;
- } else {
- value >>= 8;
- }
- }
- }
- break;
- }
- printf(format, param, value);
-}
-
-z80_context * zdebugger(z80_context * context, uint16_t address)
-{
- static char last_cmd[1024];
- char input_buf[1024];
- static uint16_t branch_t;
- static uint16_t branch_f;
- z80inst inst;
- //Check if this is a user set breakpoint, or just a temporary one
- bp_def ** this_bp = find_breakpoint(&zbreakpoints, address);
- if (*this_bp) {
- printf("Z80 Breakpoint %d hit\n", (*this_bp)->index);
- } else {
- zremove_breakpoint(context, address);
- }
- uint8_t * pc;
- if (address < 0x4000) {
- pc = z80_ram + (address & 0x1FFF);
- } else if (address >= 0x8000) {
- if (context->bank_reg < (0x400000 >> 15)) {
- fprintf(stderr, "Entered Z80 debugger in banked memory address %X, which is not yet supported\n", address);
- exit(1);
- } else {
- fprintf(stderr, "Entered Z80 debugger in banked memory address %X, but the bank is not pointed to a cartridge address\n", address);
- exit(1);
- }
- } else {
- fprintf(stderr, "Entered Z80 debugger at address %X\n", address);
- exit(1);
- }
- for (disp_def * cur = zdisplays; cur; cur = cur->next) {
- zdebugger_print(context, cur->format_char, cur->param);
- }
- uint8_t * after_pc = z80_decode(pc, &inst);
- z80_disasm(&inst, input_buf, address);
- printf("%X:\t%s\n", address, input_buf);
- uint16_t after = address + (after_pc-pc);
- int debugging = 1;
- while(debugging) {
- fputs(">", stdout);
- if (!fgets(input_buf, sizeof(input_buf), stdin)) {
- fputs("fgets failed", stderr);
- break;
- }
- strip_nl(input_buf);
- //hitting enter repeats last command
- if (input_buf[0]) {
- strcpy(last_cmd, input_buf);
- } else {
- strcpy(input_buf, last_cmd);
- }
- char * param;
- char format[8];
- uint32_t value;
- bp_def * new_bp;
- switch(input_buf[0])
- {
- case 'a':
- param = find_param(input_buf);
- if (!param) {
- fputs("a command requires a parameter\n", stderr);
- break;
- }
- value = strtol(param, NULL, 16);
- zinsert_breakpoint(context, value, (uint8_t *)zdebugger);
- debugging = 0;
- break;
- case 'b':
- param = find_param(input_buf);
- if (!param) {
- fputs("b command requires a parameter\n", stderr);
- break;
- }
- value = strtol(param, NULL, 16);
- zinsert_breakpoint(context, value, (uint8_t *)zdebugger);
- new_bp = malloc(sizeof(bp_def));
- new_bp->next = zbreakpoints;
- new_bp->address = value;
- new_bp->index = zbp_index++;
- zbreakpoints = new_bp;
- printf("Z80 Breakpoint %d set at %X\n", new_bp->index, value);
- break;
- case 'c':
- puts("Continuing");
- debugging = 0;
- break;
- case 'd':
- if (input_buf[1] == 'i') {
- char format_char = 0;
- for(int i = 2; input_buf[i] != 0 && input_buf[i] != ' '; i++) {
- if (input_buf[i] == '/') {
- format_char = input_buf[i+1];
- break;
- }
- }
- param = find_param(input_buf);
- if (!param) {
- fputs("display command requires a parameter\n", stderr);
- break;
- }
- zdebugger_print(context, format_char, param);
- add_display(&zdisplays, &zdisp_index, format_char, param);
- } else if (input_buf[1] == 'e' || input_buf[1] == ' ') {
- param = find_param(input_buf);
- if (!param) {
- fputs("delete command requires a parameter\n", stderr);
- break;
- }
- if (param[0] >= '0' && param[0] <= '9') {
- value = atoi(param);
- this_bp = find_breakpoint_idx(&zbreakpoints, value);
- if (!*this_bp) {
- fprintf(stderr, "Breakpoint %d does not exist\n", value);
- break;
- }
- new_bp = *this_bp;
- zremove_breakpoint(context, new_bp->address);
- *this_bp = new_bp->next;
- free(new_bp);
- } else if (param[0] == 'd') {
- param = find_param(param);
- if (!param) {
- fputs("delete display command requires a parameter\n", stderr);
- break;
- }
- remove_display(&zdisplays, atoi(param));
- }
- }
- break;
- case 'n':
- //TODO: Handle conditional branch instructions
- if (inst.op == Z80_JP) {
- if (inst.addr_mode == Z80_IMMED) {
- after = inst.immed;
- } else if (inst.ea_reg == Z80_HL) {
- after = context->regs[Z80_H] << 8 | context->regs[Z80_L];
- } else if (inst.ea_reg == Z80_IX) {
- after = context->regs[Z80_IXH] << 8 | context->regs[Z80_IXL];
- } else if (inst.ea_reg == Z80_IY) {
- after = context->regs[Z80_IYH] << 8 | context->regs[Z80_IYL];
- }
- } else if(inst.op == Z80_JR) {
- after += inst.immed;
- } else if(inst.op == Z80_RET) {
- if (context->sp < 0x4000) {
- after = z80_ram[context->sp & 0x1FFF] | z80_ram[(context->sp+1) & 0x1FFF] << 8;
- }
- }
- zinsert_breakpoint(context, after, (uint8_t *)zdebugger);
- debugging = 0;
- break;
- case 'p':
- param = find_param(input_buf);
- if (!param) {
- fputs("p command requires a parameter\n", stderr);
- break;
- }
- zdebugger_print(context, input_buf[1] == '/' ? input_buf[2] : 0, param);
- break;
- case 'q':
- puts("Quitting");
- exit(0);
- break;
- case 's': {
- param = find_param(input_buf);
- if (!param) {
- fputs("s command requires a file name\n", stderr);
- break;
- }
- FILE * f = fopen(param, "wb");
- if (f) {
- if(fwrite(z80_ram, 1, sizeof(z80_ram), f) != sizeof(z80_ram)) {
- fputs("Error writing file\n", stderr);
- }
- fclose(f);
- } else {
- fprintf(stderr, "Could not open %s for writing\n", param);
- }
- break;
- }
- default:
- fprintf(stderr, "Unrecognized debugger command %s\n", input_buf);
- break;
- }
- }
- return context;
-}
-
-m68k_context * debugger(m68k_context * context, uint32_t address)
-{
- static char last_cmd[1024];
- char input_buf[1024];
- static uint32_t branch_t;
- static uint32_t branch_f;
- m68kinst inst;
- //probably not necessary, but let's play it safe
- address &= 0xFFFFFF;
- if (address == branch_t) {
- bp_def ** f_bp = find_breakpoint(&breakpoints, branch_f);
- if (!*f_bp) {
- remove_breakpoint(context, branch_f);
- }
- branch_t = branch_f = 0;
- } else if(address == branch_f) {
- bp_def ** t_bp = find_breakpoint(&breakpoints, branch_t);
- if (!*t_bp) {
- remove_breakpoint(context, branch_t);
- }
- branch_t = branch_f = 0;
- }
- //Check if this is a user set breakpoint, or just a temporary one
- bp_def ** this_bp = find_breakpoint(&breakpoints, address);
- if (*this_bp) {
- printf("68K Breakpoint %d hit\n", (*this_bp)->index);
- } else {
- remove_breakpoint(context, address);
- }
- uint16_t * pc;
- if (address < 0x400000) {
- pc = cart + address/2;
- } else if(address > 0xE00000) {
- pc = ram + (address & 0xFFFF)/2;
- } else {
- fprintf(stderr, "Entered 68K debugger at address %X\n", address);
- exit(1);
- }
- uint16_t * after_pc = m68k_decode(pc, &inst, address);
- m68k_disasm(&inst, input_buf);
- printf("%X: %s\n", address, input_buf);
- uint32_t after = address + (after_pc-pc)*2;
- int debugging = 1;
- while (debugging) {
- fputs(">", stdout);
- if (!fgets(input_buf, sizeof(input_buf), stdin)) {
- fputs("fgets failed", stderr);
- break;
- }
- strip_nl(input_buf);
- //hitting enter repeats last command
- if (input_buf[0]) {
- strcpy(last_cmd, input_buf);
- } else {
- strcpy(input_buf, last_cmd);
- }
- char * param;
- char format[8];
- uint32_t value;
- bp_def * new_bp;
- switch(input_buf[0])
- {
- case 'c':
- puts("Continuing");
- debugging = 0;
- break;
- case 'b':
- param = find_param(input_buf);
- if (!param) {
- fputs("b command requires a parameter\n", stderr);
- break;
- }
- value = strtol(param, NULL, 16);
- insert_breakpoint(context, value, (uint8_t *)debugger);
- new_bp = malloc(sizeof(bp_def));
- new_bp->next = breakpoints;
- new_bp->address = value;
- new_bp->index = bp_index++;
- breakpoints = new_bp;
- printf("68K Breakpoint %d set at %X\n", new_bp->index, value);
- break;
- case 'a':
- param = find_param(input_buf);
- if (!param) {
- fputs("a command requires a parameter\n", stderr);
- break;
- }
- value = strtol(param, NULL, 16);
- insert_breakpoint(context, value, (uint8_t *)debugger);
- debugging = 0;
- break;
- case 'd':
- param = find_param(input_buf);
- if (!param) {
- fputs("d command requires a parameter\n", stderr);
- break;
- }
- value = atoi(param);
- this_bp = find_breakpoint_idx(&breakpoints, value);
- if (!*this_bp) {
- fprintf(stderr, "Breakpoint %d does not exist\n", value);
- break;
- }
- new_bp = *this_bp;
- *this_bp = (*this_bp)->next;
- free(new_bp);
- break;
- case 'p':
- strcpy(format, "%s: %d\n");
- if (input_buf[1] == '/') {
- switch (input_buf[2])
- {
- case 'x':
- case 'X':
- case 'd':
- case 'c':
- format[5] = input_buf[2];
- break;
- default:
- fprintf(stderr, "Unrecognized format character: %c\n", input_buf[2]);
- }
- }
- param = find_param(input_buf);
- if (!param) {
- fputs("p command requires a parameter\n", stderr);
- break;
- }
- if (param[0] == 'd' && param[1] >= '0' && param[1] <= '7') {
- value = context->dregs[param[1]-'0'];
- } else if (param[0] == 'a' && param[1] >= '0' && param[1] <= '7') {
- value = context->aregs[param[1]-'0'];
- } else if (param[0] == 'S' && param[1] == 'R') {
- value = (context->status << 8);
- for (int flag = 0; flag < 5; flag++) {
- value |= context->flags[flag] << (4-flag);
- }
- } else if(param[0] == 'c') {
- value = context->current_cycle;
- } else if (param[0] == '0' && param[1] == 'x') {
- uint32_t p_addr = strtol(param+2, NULL, 16);
- value = read_dma_value(p_addr/2);
- } else {
- fprintf(stderr, "Unrecognized parameter to p: %s\n", param);
- break;
- }
- printf(format, param, value);
- break;
- case 'n':
- if (inst.op == M68K_RTS) {
- after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1);
- } else if (inst.op == M68K_RTE || inst.op == M68K_RTR) {
- after = (read_dma_value((context->aregs[7]+2)/2) << 16) | read_dma_value((context->aregs[7]+2)/2 + 1);
- } else if(m68k_is_noncall_branch(&inst)) {
- if (inst.op == M68K_BCC && inst.extra.cond != COND_TRUE) {
- branch_f = after;
- branch_t = m68k_branch_target(&inst, context->dregs, context->aregs);
- insert_breakpoint(context, branch_t, (uint8_t *)debugger);
- } else if(inst.op == M68K_DBCC) {
- if ( inst.extra.cond == COND_FALSE) {
- if (context->dregs[inst.dst.params.regs.pri] & 0xFFFF) {
- after = m68k_branch_target(&inst, context->dregs, context->aregs);
- }
- } else {
- branch_t = after;
- branch_f = m68k_branch_target(&inst, context->dregs, context->aregs);
- insert_breakpoint(context, branch_f, (uint8_t *)debugger);
- }
- } else {
- after = m68k_branch_target(&inst, context->dregs, context->aregs);
- }
- }
- insert_breakpoint(context, after, (uint8_t *)debugger);
- debugging = 0;
- break;
- case 'o':
- if (inst.op == M68K_RTS) {
- after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1);
- } else if (inst.op == M68K_RTE || inst.op == M68K_RTR) {
- after = (read_dma_value((context->aregs[7]+2)/2) << 16) | read_dma_value((context->aregs[7]+2)/2 + 1);
- } else if(m68k_is_noncall_branch(&inst)) {
- if (inst.op == M68K_BCC && inst.extra.cond != COND_TRUE) {
- branch_t = m68k_branch_target(&inst, context->dregs, context->aregs);
- if (branch_t < after) {
- branch_t = 0;
- } else {
- branch_f = after;
- insert_breakpoint(context, branch_t, (uint8_t *)debugger);
- }
- } else if(inst.op == M68K_DBCC) {
- uint32_t target = m68k_branch_target(&inst, context->dregs, context->aregs);
- if (target > after) {
- if (inst.extra.cond == COND_FALSE) {
- after = target;
- } else {
- branch_f = target;
- branch_t = after;
- insert_breakpoint(context, branch_f, (uint8_t *)debugger);
- }
- }
- } else {
- after = m68k_branch_target(&inst, context->dregs, context->aregs);
- }
- }
- insert_breakpoint(context, after, (uint8_t *)debugger);
- debugging = 0;
- break;
- case 's':
- if (inst.op == M68K_RTS) {
- after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1);
- } else if (inst.op == M68K_RTE || inst.op == M68K_RTR) {
- after = (read_dma_value((context->aregs[7]+2)/2) << 16) | read_dma_value((context->aregs[7]+2)/2 + 1);
- } else if(m68k_is_branch(&inst)) {
- if (inst.op == M68K_BCC && inst.extra.cond != COND_TRUE) {
- branch_f = after;
- branch_t = m68k_branch_target(&inst, context->dregs, context->aregs);
- insert_breakpoint(context, branch_t, (uint8_t *)debugger);
- } else if(inst.op == M68K_DBCC && inst.extra.cond != COND_FALSE) {
- branch_t = after;
- branch_f = m68k_branch_target(&inst, context->dregs, context->aregs);
- insert_breakpoint(context, branch_f, (uint8_t *)debugger);
- } else {
- after = m68k_branch_target(&inst, context->dregs, context->aregs);
- }
- }
- insert_breakpoint(context, after, (uint8_t *)debugger);
- debugging = 0;
- break;
- case 'v': {
- genesis_context * gen = context->system;
- //VDP debug commands
- switch(input_buf[1])
- {
- case 's':
- vdp_print_sprite_table(gen->vdp);
- break;
- case 'r':
- vdp_print_reg_explain(gen->vdp);
- break;
- }
- break;
- }
- case 'z': {
- genesis_context * gen = context->system;
- //Z80 debug commands
- switch(input_buf[1])
- {
- case 'b':
- param = find_param(input_buf);
- if (!param) {
- fputs("zb command requires a parameter\n", stderr);
- break;
- }
- value = strtol(param, NULL, 16);
- zinsert_breakpoint(gen->z80, value, (uint8_t *)zdebugger);
- new_bp = malloc(sizeof(bp_def));
- new_bp->next = zbreakpoints;
- new_bp->address = value;
- new_bp->index = zbp_index++;
- zbreakpoints = new_bp;
- printf("Z80 Breakpoint %d set at %X\n", new_bp->index, value);
- break;
- case 'p':
- param = find_param(input_buf);
- if (!param) {
- fputs("zp command requires a parameter\n", stderr);
- break;
- }
- zdebugger_print(gen->z80, input_buf[2] == '/' ? input_buf[3] : 0, param);
- }
- break;
- }
- case 'q':
- puts("Quitting");
- exit(0);
- break;
- default:
- fprintf(stderr, "Unrecognized debugger command %s\n", input_buf);
- break;
- }
- }
- return context;
-}
-
void set_speed_percent(genesis_context * context, uint32_t percent)
{
uint32_t old_clock = context->master_clock;
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-19 20:41:13 +0000