diff options
| -rw-r--r-- | vdp.c | 19 |
1 files changed, 11 insertions, 8 deletions
@@ -712,7 +712,7 @@ static void read_sprite_x_mode4(vdp_context * context) #define VSRAM_DIRTY_BITS 0xF800 //rough estimate of slot number at which border display starts -#define BG_START_SLOT 0 +#define BG_START_SLOT 6 void write_cram(vdp_context * context, uint16_t address, uint16_t value) { @@ -1204,7 +1204,16 @@ static void render_map_output(uint32_t line, int32_t col, vdp_context * context) if (col) { col-=2; - dst = context->output + BORDER_LEFT + col * 8; + if (col) { + dst = context->output + BORDER_LEFT + col * 8; + } else { + dst = context->output; + uint32_t bg_color = context->colors[context->regs[REG_BG_COLOR] & 0x3F]; + for (int i = 0; i < BORDER_LEFT; i++, dst++) + { + *dst = bg_color; + } + } if (context->debug < 2) { sprite_buf = context->linebuf + col * 8; uint8_t a_src, src; @@ -1528,12 +1537,6 @@ static void vdp_advance_line(vdp_context *context) read_map_scroll_a(column, context->vcounter, context);\ CHECK_LIMIT\ case ((startcyc+1)&0xFF):\ - if (column == 2) {\ - uint32_t bg_color = context->colors[context->regs[REG_BG_COLOR] & 0x3F];\ - for (int i = 0; i < BORDER_LEFT; i++) {\ - context->output[i] = bg_color;\ - }\ - }\ external_slot(context);\ CHECK_LIMIT\ case ((startcyc+2)&0xFF):\ |