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Add support for the parts of the KMod debug ports used by SGDK
author Mike Pavone <pavone@retrodev.com>
date Mon, 19 Oct 2020 15:46:16 -0700
parents 0740d90812ee
children 19957e7353a4
comparison
equal deleted inserted replaced
2008:a8e3e816a50d 2009:4ace0fef6f8f
8 #include <stdlib.h> 8 #include <stdlib.h>
9 #include <string.h> 9 #include <string.h>
10 #include "render.h" 10 #include "render.h"
11 #include "util.h" 11 #include "util.h"
12 #include "event_log.h" 12 #include "event_log.h"
13 #include "terminal.h"
13 14
14 #define NTSC_INACTIVE_START 224 15 #define NTSC_INACTIVE_START 224
15 #define PAL_INACTIVE_START 240 16 #define PAL_INACTIVE_START 240
16 #define MODE4_INACTIVE_START 192 17 #define MODE4_INACTIVE_START 192
17 #define BUF_BIT_PRIORITY 0x40 18 #define BUF_BIT_PRIORITY 0x40
3780 } 3781 }
3781 } 3782 }
3782 if (reg == REG_MODE_1 || reg == REG_MODE_2 || reg == REG_MODE_4) { 3783 if (reg == REG_MODE_1 || reg == REG_MODE_2 || reg == REG_MODE_4) {
3783 update_video_params(context); 3784 update_video_params(context);
3784 } 3785 }
3786 } else if (reg == REG_KMOD_CTRL) {
3787 if (!(value & 0xFF)) {
3788 context->system->enter_debugger = 1;
3789 }
3790 } else if (reg == REG_KMOD_MSG) {
3791 char c = value;
3792 if (c) {
3793 context->kmod_buffer_length++;
3794 if ((context->kmod_buffer_length + 1) > context->kmod_buffer_storage) {
3795 context->kmod_buffer_storage = context->kmod_buffer_length ? 128 : context->kmod_buffer_length * 2;
3796 context->kmod_msg_buffer = realloc(context->kmod_msg_buffer, context->kmod_buffer_storage);
3797 }
3798 context->kmod_msg_buffer[context->kmod_buffer_length - 1] = c;
3799 } else if (context->kmod_buffer_length) {
3800 context->kmod_msg_buffer[context->kmod_buffer_length] = 0;
3801 init_terminal();
3802 printf("KDEBUG MESSAGE: %s\n", context->kmod_msg_buffer);
3803 context->kmod_buffer_length = 0;
3804 }
3805 } else if (reg == REG_KMOD_TIMER) {
3806 if (!(value & 0x80)) {
3807 init_terminal();
3808 printf("KDEBUG TIMER: %d\n", (context->cycles - context->timer_start_cycle) / 7);
3809 }
3810 if (value & 0xC0) {
3811 context->timer_start_cycle = context->cycles;
3812 }
3785 } 3813 }
3786 } else if (mode_5) { 3814 } else if (mode_5) {
3787 context->flags |= FLAG_PENDING; 3815 context->flags |= FLAG_PENDING;
3788 //Should these be taken care of here or after the second write? 3816 //Should these be taken care of here or after the second write?
3789 //context->flags &= ~FLAG_READ_FETCHED; 3817 //context->flags &= ~FLAG_READ_FETCHED;