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| author | Michael Pavone <pavone@retrodev.com> | 2017-03-06 23:05:31 -0800 |
|---|---|---|
| committer | Michael Pavone <pavone@retrodev.com> | 2017-03-06 23:05:31 -0800 |
| commit | 05df23dd77b379820262f18b2944063a2c9a208e (patch) | |
| tree | d270122dd7e1302286715423e7deb1b9d6502b3a | |
| parent | 51e5882e52313077cae1f0d2a1a1e9042ef96df7 (diff) | |
Adjust correspondance between slot number and actual video output to better match video signal measurements and analysis of Outrunners behavior on hardware. Partially fixes ticket:13
| -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):\ |