diff options
Diffstat (limited to 'vdp.c')
| -rw-r--r-- | vdp.c | 148 |
1 files changed, 147 insertions, 1 deletions
@@ -1221,6 +1221,147 @@ void vdp_h32(uint32_t line, uint32_t linecyc, vdp_context * context) break; } } + +void vdp_h40_line(uint32_t line, vdp_context * context) +{ + context->cur_slot = MAX_DRAWS-1; + memset(context->linebuf, 0, LINEBUF_SIZE); + if (line == 0xFF) { + external_slot(context); + if (context->flags & FLAG_DMA_RUN) { + run_dma_src(context, 0); + } + external_slot(context); + if (context->flags & FLAG_DMA_RUN) { + run_dma_src(context, 0); + } + external_slot(context); + if (context->flags & FLAG_DMA_RUN) { + run_dma_src(context, 0); + } + external_slot(context); + if (context->flags & FLAG_DMA_RUN) { + run_dma_src(context, 0); + } + } else { + render_sprite_cells(context); + render_sprite_cells(context); + render_sprite_cells(context); + render_sprite_cells(context); + } + context->sprite_index = 0x80; + context->slot_counter = MAX_SPRITES_LINE; + for (int i = 0; i < 19; i++) + { + render_sprite_cells(context); + scan_sprite_table(line, context); + } + external_slot(context); + for (int i = 0; i < 11; i++) + { + render_sprite_cells(context); + scan_sprite_table(line, context); + } + uint16_t address; + uint32_t mask; + address = (context->regs[REG_HSCROLL] & 0x3F) << 10; + mask = 0; + if (context->regs[REG_MODE_3] & 0x2) { + mask |= 0xF8; + } + if (context->regs[REG_MODE_3] & 0x1) { + mask |= 0x7; + } + address += (line & mask) * 4; + context->hscroll_a = context->vdpmem[address] << 8 | context->vdpmem[address+1]; + context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; + render_sprite_cells(context); + scan_sprite_table(line, context); + render_sprite_cells(context); + scan_sprite_table(line, context); + render_sprite_cells(context); + scan_sprite_table(line, context); + render_sprite_cells(context); + scan_sprite_table(line, context); + + render_sprite_cells(context); + scan_sprite_table(line, context); + read_map_scroll_a(0, line, context); + render_sprite_cells(context); + scan_sprite_table(line, context); + render_map_1(context); + scan_sprite_table(line, context);//Just a guess + render_map_2(context); + scan_sprite_table(line, context);//Just a guess + read_map_scroll_b(0, line, context); + render_sprite_cells(context); + scan_sprite_table(line, context); + render_map_3(context); + scan_sprite_table(line, context);//Just a guess + render_map_output(line, 0, context); + scan_sprite_table(line, context);//Just a guess + //reverse context slot counter so it counts the number of sprite slots + //filled rather than the number of available slots + //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; + context->cur_slot = MAX_SPRITES_LINE-1; + context->sprite_draws = MAX_DRAWS; + context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); + for (int column = 2; column < 42; column += 2) + { + read_map_scroll_a(column, line, context); + external_slot(context); + if (context->flags & FLAG_DMA_RUN) { + run_dma_src(context, 0); + } + render_map_1(context); + render_map_2(context); + read_map_scroll_b(column, line, context); + read_sprite_x(line, context); + render_map_3(context); + render_map_output(line, column, context); + + column += 2; + read_map_scroll_a(column, line, context); + external_slot(context); + if (context->flags & FLAG_DMA_RUN) { + run_dma_src(context, 0); + } + render_map_1(context); + render_map_2(context); + read_map_scroll_b(column, line, context); + read_sprite_x(line, context); + render_map_3(context); + render_map_output(line, column, context); + + column += 2; + read_map_scroll_a(column, line, context); + external_slot(context); + if (context->flags & FLAG_DMA_RUN) { + run_dma_src(context, 0); + } + render_map_1(context); + render_map_2(context); + read_map_scroll_b(column, line, context); + read_sprite_x(line, context); + render_map_3(context); + render_map_output(line, column, context); + + column += 2; + read_map_scroll_a(column, line, context); + render_map_1(context); + render_map_2(context); + read_map_scroll_b(column, line, context); + read_sprite_x(line, context); + render_map_3(context); + render_map_output(line, column, context); + } + external_slot(context); + if (context->flags & FLAG_DMA_RUN) { + run_dma_src(context, 0); + } + external_slot(context); +} + void latch_mode(vdp_context * context) { context->latched_mode = (context->regs[REG_MODE_4] & 0x81) | (context->regs[REG_MODE_2] & BIT_PAL); @@ -1390,7 +1531,12 @@ void vdp_run_context(vdp_context * context, uint32_t target_cycles) //Convert to slot number if (context->latched_mode & BIT_H40){ - vdp_h40(line, slot, context); + if (!slot && line != (active_lines-1) && (target_cycles - context->cycles) >= MCLKS_LINE) { + vdp_h40_line(line, context); + inccycles = MCLKS_LINE; + } else { + vdp_h40(line, slot, context); + } } else { vdp_h32(line, slot, context); } |