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comparison vdp.c @ 329:fd5f6577db9b

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Implement first line/last line weirdness in VDP
author Mike Pavone <pavone@retrodev.com>
date Mon, 13 May 2013 21:52:33 -0700
parents bf7ed23efa40
children 57453d3d8be4
comparison
equal deleted inserted replaced
328:bf7ed23efa40 329:fd5f6577db9b
768 { 768 {
769 //sprite render to line buffer starts 769 //sprite render to line buffer starts
770 case 0: 770 case 0:
771 context->cur_slot = MAX_DRAWS-1; 771 context->cur_slot = MAX_DRAWS-1;
772 memset(context->linebuf, 0, LINEBUF_SIZE); 772 memset(context->linebuf, 0, LINEBUF_SIZE);
773 render_sprite_cells(context);
774 break;
775 case 1: 773 case 1:
776 case 2: 774 case 2:
777 case 3: 775 case 3:
778 render_sprite_cells(context); 776 if (line == 0xFF) {
777 external_slot(context);
778 } else {
779 render_sprite_cells(context);
780 }
779 break; 781 break;
780 //sprite attribute table scan starts 782 //sprite attribute table scan starts
781 case 4: 783 case 4:
782 render_sprite_cells( context); 784 render_sprite_cells( context);
783 context->sprite_index = 0x80; 785 context->sprite_index = 0x80;
920 { 922 {
921 //sprite render to line buffer starts 923 //sprite render to line buffer starts
922 case 0: 924 case 0:
923 context->cur_slot = MAX_DRAWS_H32-1; 925 context->cur_slot = MAX_DRAWS_H32-1;
924 memset(context->linebuf, 0, LINEBUF_SIZE); 926 memset(context->linebuf, 0, LINEBUF_SIZE);
925 render_sprite_cells(context);
926 break;
927 case 1: 927 case 1:
928 case 2: 928 case 2:
929 case 3: 929 case 3:
930 render_sprite_cells(context); 930 if (line == 0xFF) {
931 external_slot(context);
932 } else {
933 render_sprite_cells(context);
934 }
931 break; 935 break;
932 //sprite attribute table scan starts 936 //sprite attribute table scan starts
933 case 4: 937 case 4:
934 render_sprite_cells( context); 938 render_sprite_cells( context);
935 context->sprite_index = 0x80; 939 context->sprite_index = 0x80;
1124 uint32_t intcyc = context->latched_mode & BIT_H40 ? VINT_SLOTS_H40 * MCLKS_SLOT_H40 : VINT_SLOTS_H32 * MCLKS_SLOT_H32; 1128 uint32_t intcyc = context->latched_mode & BIT_H40 ? VINT_SLOTS_H40 * MCLKS_SLOT_H40 : VINT_SLOTS_H32 * MCLKS_SLOT_H32;
1125 if (linecyc == intcyc) { 1129 if (linecyc == intcyc) {
1126 context->flags2 |= FLAG2_VINT_PENDING; 1130 context->flags2 |= FLAG2_VINT_PENDING;
1127 } 1131 }
1128 } 1132 }
1129 if (line < active_lines && context->regs[REG_MODE_2] & DISPLAY_ENABLE) { 1133 if ((line < active_lines || (line == active_lines && linecyc < (context->latched_mode & BIT_H40 ? 64 : 80))) && context->regs[REG_MODE_2] & DISPLAY_ENABLE) {
1130 //first sort-of active line is treated as 255 internally 1134 //first sort-of active line is treated as 255 internally
1131 //it's used for gathering sprite info for line 1135 //it's used for gathering sprite info for line
1132 line = (line - 1) & 0xFF; 1136 line = (line - 1) & 0xFF;
1133 1137
1134 //Convert to slot number 1138 //Convert to slot number