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comparison vdp.c @ 1270:687d3969416b

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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
author Michael Pavone <pavone@retrodev.com>
date Mon, 06 Mar 2017 23:05:31 -0800
parents ff8e29eeb1ec
children c865ee5478bc
comparison
equal deleted inserted replaced
1269:ff8e29eeb1ec 1270:687d3969416b
710 #define CRAM_BITS 0xEEE 710 #define CRAM_BITS 0xEEE
711 #define VSRAM_BITS 0x7FF 711 #define VSRAM_BITS 0x7FF
712 #define VSRAM_DIRTY_BITS 0xF800 712 #define VSRAM_DIRTY_BITS 0xF800
713 713
714 //rough estimate of slot number at which border display starts 714 //rough estimate of slot number at which border display starts
715 #define BG_START_SLOT 0 715 #define BG_START_SLOT 6
716 716
717 void write_cram(vdp_context * context, uint16_t address, uint16_t value) 717 void write_cram(vdp_context * context, uint16_t address, uint16_t value)
718 { 718 {
719 uint16_t addr; 719 uint16_t addr;
720 if (context->regs[REG_MODE_2] & BIT_MODE_5) { 720 if (context->regs[REG_MODE_2] & BIT_MODE_5) {
1202 uint8_t *sprite_buf, *plane_a, *plane_b; 1202 uint8_t *sprite_buf, *plane_a, *plane_b;
1203 int plane_a_off, plane_b_off; 1203 int plane_a_off, plane_b_off;
1204 if (col) 1204 if (col)
1205 { 1205 {
1206 col-=2; 1206 col-=2;
1207 dst = context->output + BORDER_LEFT + col * 8; 1207 if (col) {
1208 dst = context->output + BORDER_LEFT + col * 8;
1209 } else {
1210 dst = context->output;
1211 uint32_t bg_color = context->colors[context->regs[REG_BG_COLOR] & 0x3F];
1212 for (int i = 0; i < BORDER_LEFT; i++, dst++)
1213 {
1214 *dst = bg_color;
1215 }
1216 }
1208 if (context->debug < 2) { 1217 if (context->debug < 2) {
1209 sprite_buf = context->linebuf + col * 8; 1218 sprite_buf = context->linebuf + col * 8;
1210 uint8_t a_src, src; 1219 uint8_t a_src, src;
1211 if (context->flags & FLAG_WINDOW) { 1220 if (context->flags & FLAG_WINDOW) {
1212 plane_a_off = context->buf_a_off; 1221 plane_a_off = context->buf_a_off;
1526 #define COLUMN_RENDER_BLOCK(column, startcyc) \ 1535 #define COLUMN_RENDER_BLOCK(column, startcyc) \
1527 case startcyc:\ 1536 case startcyc:\
1528 read_map_scroll_a(column, context->vcounter, context);\ 1537 read_map_scroll_a(column, context->vcounter, context);\
1529 CHECK_LIMIT\ 1538 CHECK_LIMIT\
1530 case ((startcyc+1)&0xFF):\ 1539 case ((startcyc+1)&0xFF):\
1531 if (column == 2) {\
1532 uint32_t bg_color = context->colors[context->regs[REG_BG_COLOR] & 0x3F];\
1533 for (int i = 0; i < BORDER_LEFT; i++) {\
1534 context->output[i] = bg_color;\
1535 }\
1536 }\
1537 external_slot(context);\ 1540 external_slot(context);\
1538 CHECK_LIMIT\ 1541 CHECK_LIMIT\
1539 case ((startcyc+2)&0xFF):\ 1542 case ((startcyc+2)&0xFF):\
1540 render_map_1(context);\ 1543 render_map_1(context);\
1541 CHECK_LIMIT\ 1544 CHECK_LIMIT\