diff options
Diffstat (limited to 'vdp.c')
| -rw-r--r-- | vdp.c | 27 |
1 files changed, 22 insertions, 5 deletions
@@ -1653,22 +1653,39 @@ void vdp_int_ack(vdp_context * context, uint16_t int_num) #define GST_VDP_REGS 0xFA #define GST_VDP_MEM 0x12478 -void vdp_load_savestate(vdp_context * context, FILE * state_file) +uint8_t vdp_load_gst(vdp_context * context, FILE * state_file) { uint8_t tmp_buf[CRAM_SIZE*2]; fseek(state_file, GST_VDP_REGS, SEEK_SET); - fread(context->regs, 1, VDP_REGS, state_file); + if (fread(context->regs, 1, VDP_REGS, state_file) != VDP_REGS) { + fputs("Failed to read VDP registers from savestate\n", stderr); + return 0; + } + context->double_res = (context->regs[REG_MODE_4] & (BIT_INTERLACE | BIT_DOUBLE_RES)) == (BIT_INTERLACE | BIT_DOUBLE_RES); + if (!context->double_res) { + context->framebuf = context->oddbuf; + } latch_mode(context); - fread(tmp_buf, 1, sizeof(tmp_buf), state_file); + if (fread(tmp_buf, 1, sizeof(tmp_buf), state_file) != sizeof(tmp_buf)) { + fputs("Failed to read CRAM from savestate\n", stderr); + return 0; + } for (int i = 0; i < CRAM_SIZE; i++) { context->cram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; } - fread(tmp_buf, 2, VSRAM_SIZE, state_file); + if (fread(tmp_buf, 2, VSRAM_SIZE, state_file) != VSRAM_SIZE) { + fputs("Failed to read VSRAM from savestate\n", stderr); + return 0; + } for (int i = 0; i < VSRAM_SIZE; i++) { context->vsram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; } fseek(state_file, GST_VDP_MEM, SEEK_SET); - fread(context->vdpmem, 1, VRAM_SIZE, state_file); + if (fread(context->vdpmem, 1, VRAM_SIZE, state_file) != VRAM_SIZE) { + fputs("Failed to read VRAM from savestate\n", stderr); + return 0; + } + return 1; } void vdp_save_state(vdp_context * context, FILE * outfile) |