Mercurial > repos > blastem
diff vdp.c @ 803:236a184bf6f0
Merge
author | Michael Pavone <pavone@retrodev.com> |
---|---|
date | Sun, 26 Jul 2015 16:51:03 -0700 |
parents | 0565b2c1a034 |
children | ac65086c031e |
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line diff
--- a/vdp.c Sun Jul 26 16:48:25 2015 -0700 +++ b/vdp.c Sun Jul 26 16:51:03 2015 -0700 @@ -9,8 +9,8 @@ #include <string.h> #include "render.h" -#define NTSC_ACTIVE 225 -#define PAL_ACTIVE 241 +#define NTSC_INACTIVE_START 224 +#define PAL_INACTIVE_START 240 #define BUF_BIT_PRIORITY 0x40 #define MAP_BIT_PRIORITY 0x8000 #define MAP_BIT_H_FLIP 0x800 @@ -22,14 +22,19 @@ #define MCLKS_SLOT_H40 16 #define MCLKS_SLOT_H32 20 -#define VINT_CYCLE_H40 (21*MCLKS_SLOT_H40+332+9*MCLKS_SLOT_H40) //21 slots before HSYNC, 16 during, 10 after -#define VINT_CYCLE_H32 ((33+20+7)*MCLKS_SLOT_H32) //33 slots before HSYNC, 20 during, 7 after TODO: confirm final number -#define HSYNC_SLOT_H40 21 -#define MCLK_WEIRD_END (HSYNC_SLOT_H40*MCLKS_SLOT_H40 + 332) -#define SLOT_WEIRD_END (HSYNC_SLOT_H40+17) +#define VINT_SLOT_H40 4 //21 slots before HSYNC, 16 during, 10 after +#define VINT_SLOT_H32 4 //old value was 23, but recent tests suggest the actual value is close to the H40 one +#define HSYNC_SLOT_H40 234 +#define HSYNC_END_H40 (HSYNC_SLOT_H40+17) #define HSYNC_END_H32 (33 * MCLKS_SLOT_H32) -#define HBLANK_CLEAR_H40 (MCLK_WEIRD_END+61*4) -#define HBLANK_CLEAR_H32 (HSYNC_END_H32 + 46*5) +#define HBLANK_START_H40 178 //should be 179 according to Nemesis, but 178 seems to fit slightly better with my test ROM results +#define HBLANK_END_H40 0 //should be 5.5 according to Nemesis, but 0 seems to fit better with my test ROM results +#define HBLANK_START_H32 233 //should be 147 according to Nemesis which is very different from my test ROM result +#define HBLANK_END_H32 0 //should be 5 according to Nemesis, but 0 seems to fit better with my test ROM results +#define LINE_CHANGE_H40 165 +#define LINE_CHANGE_H32 132 +#define VBLANK_START_H40 (LINE_CHANGE_H40+2) +#define VBLANK_START_H32 (LINE_CHANGE_H32+2) #define FIFO_LATENCY 3 int32_t color_map[1 << 12]; @@ -45,7 +50,7 @@ uint8_t color_map_init_done; -void init_vdp_context(vdp_context * context) +void init_vdp_context(vdp_context * context, uint8_t region_pal) { memset(context, 0, sizeof(*context)); context->vdpmem = malloc(VRAM_SIZE); @@ -57,10 +62,8 @@ memset(context->framebuf, 0, FRAMEBUF_ENTRIES * (32 / 8)); context->evenbuf = malloc(FRAMEBUF_ENTRIES * (32 / 8)); memset(context->evenbuf, 0, FRAMEBUF_ENTRIES * (32 / 8)); - context->b32 = 1; } else { render_alloc_surfaces(context); - context->b32 = render_depth() == 32; } context->framebuf = context->oddbuf; context->linebuf = malloc(LINEBUF_SIZE + SCROLL_BUFFER_SIZE*2); @@ -132,18 +135,21 @@ context->debugcolors[color] = render_map_color(r, g, b); } } + if (region_pal) { + context->flags2 |= FLAG2_REGION_PAL; + } } int is_refresh(vdp_context * context, uint32_t slot) { - if (context->latched_mode & BIT_H40) { - return (slot == 37 || slot == 69 || slot == 102 || slot == 133 || slot == 165 || slot == 197 || slot >= 210); + if (context->regs[REG_MODE_4] & BIT_H40) { + return slot == 250 || slot == 26 || slot == 59 || slot == 90 || slot == 122 || slot == 154; } else { //TODO: Figure out which slots are refresh when display is off in 32-cell mode //These numbers are guesses based on H40 numbers - return (slot == 24 || slot == 56 || slot == 88 || slot == 120 || slot == 152); + return slot == 243 || slot == 19 || slot == 51 || slot == 83 || slot == 115; //The numbers below are the refresh slots during active display - //return (slot == 66 || slot == 98 || slot == 130 || slot == 162); + //return (slot == 29 || slot == 61 || slot == 93 || slot == 125); } } @@ -203,6 +209,45 @@ } while (current_index != 0 && count < 80); } +#define VRAM_READ 0 //0000 +#define VRAM_WRITE 1 //0001 +//2 would trigger register write 0010 +#define CRAM_WRITE 3 //0011 +#define VSRAM_READ 4 //0100 +#define VSRAM_WRITE 5//0101 +//6 would trigger regsiter write 0110 +//7 is a mystery +#define CRAM_READ 8 //1000 +//9 is also a mystery //1001 +//A would trigger register write 1010 +//B is a mystery 1011 +#define VRAM_READ8 0xC //1100 +//D is a mystery 1101 +//E would trigger register write 1110 +//F is a mystery 1111 +#define DMA_START 0x20 + +const char * cd_name(uint8_t cd) +{ + switch (cd & 0xF) + { + case VRAM_READ: + return "VRAM read"; + case VRAM_WRITE: + return "VRAM write"; + case CRAM_WRITE: + return "CRAM write"; + case VSRAM_READ: + return "VSRAM read"; + case VSRAM_WRITE: + return "VSRAM write"; + case VRAM_READ8: + return "VRAM read (undocumented 8-bit mode)"; + default: + return "invalid"; + } +} + void vdp_print_reg_explain(vdp_context * context) { char * hscroll[] = {"full", "7-line", "cell", "line"}; @@ -211,7 +256,7 @@ "01: %.2X | Display %s, V-ints %s, Height: %d, Mode %d\n" "0B: %.2X | E-ints %s, V-Scroll: %s, H-Scroll: %s\n" "0C: %.2X | Width: %d, Shadow/Highlight: %s\n", - context->regs[REG_MODE_1], context->regs[REG_MODE_1] & BIT_HINT_EN ? "enabled" : "disabled", context->regs[REG_MODE_1] & BIT_PAL_SEL != 0, + context->regs[REG_MODE_1], context->regs[REG_MODE_1] & BIT_HINT_EN ? "enabled" : "disabled", (context->regs[REG_MODE_1] & BIT_PAL_SEL) != 0, context->regs[REG_MODE_1] & BIT_HVC_LATCH ? "enabled" : "disabled", context->regs[REG_MODE_1] & BIT_DISP_DIS ? "disabled" : "enabled", context->regs[REG_MODE_2], context->regs[REG_MODE_2] & BIT_DISP_EN ? "enabled" : "disabled", context->regs[REG_MODE_2] & BIT_VINT_EN ? "enabled" : "disabled", context->regs[REG_MODE_2] & BIT_PAL ? 30 : 28, context->regs[REG_MODE_2] & BIT_MODE_5 ? 5 : 4, @@ -227,8 +272,8 @@ context->regs[REG_SCROLL_A], (context->regs[REG_SCROLL_A] & 0x38) << 10, context->regs[REG_WINDOW], (context->regs[REG_WINDOW] & (context->regs[REG_MODE_4] & BIT_H40 ? 0x3C : 0x3E)) << 10, context->regs[REG_SCROLL_B], (context->regs[REG_SCROLL_B] & 0x7) << 13, - context->regs[REG_SAT], (context->regs[REG_SAT] & (context->regs[REG_MODE_4] & BIT_H40 ? 0x3E : 0x3F)) << 9, - context->regs[REG_HSCROLL], (context->regs[REG_HSCROLL] & 0x1F) << 10); + context->regs[REG_SAT], (context->regs[REG_SAT] & (context->regs[REG_MODE_4] & BIT_H40 ? 0x7E : 0x7F)) << 9, + context->regs[REG_HSCROLL], (context->regs[REG_HSCROLL] & 0x3F) << 10); char * sizes[] = {"32", "64", "invalid", "128"}; printf("\n**Misc Group**\n" "07: %.2X | Backdrop Color: $%X\n" @@ -239,11 +284,28 @@ context->regs[REG_HINT], context->regs[REG_HINT], context->regs[REG_AUTOINC], context->regs[REG_AUTOINC], context->regs[REG_SCROLL], sizes[context->regs[REG_SCROLL] & 0x3], sizes[context->regs[REG_SCROLL] >> 4 & 0x3]); + char * src_types[] = {"68K", "68K", "Copy", "Fill"}; + printf("\n**DMA Group**\n" + "13: %.2X |\n" + "14: %.2X | DMA Length: $%.4X words\n" + "15: %.2X |\n" + "16: %.2X |\n" + "17: %.2X | DMA Source Address: $%.6X, Type: %s\n", + context->regs[REG_DMALEN_L], + context->regs[REG_DMALEN_H], context->regs[REG_DMALEN_H] << 8 | context->regs[REG_DMALEN_L], + context->regs[REG_DMASRC_L], + context->regs[REG_DMASRC_M], + context->regs[REG_DMASRC_H], + context->regs[REG_DMASRC_H] << 17 | context->regs[REG_DMASRC_M] << 9 | context->regs[REG_DMASRC_L] << 1, + src_types[context->regs[REG_DMASRC_H] >> 6 & 3]); printf("\n**Internal Group**\n" "Address: %X\n" - "CD: %X\n" - "Pending: %s\n", - context->address, context->cd, (context->flags & FLAG_PENDING) ? "true" : "false"); + "CD: %X - %s\n" + "Pending: %s\n" + "VCounter: %d\n" + "HCounter: %d\n", + context->address, context->cd, cd_name(context->cd), (context->flags & FLAG_PENDING) ? "true" : "false", + context->vcounter, context->hslot*2); //TODO: Window Group, DMA Group } @@ -269,7 +331,7 @@ height_mult = 8; } context->sprite_index &= 0x7F; - if (context->latched_mode & BIT_H40) { + if (context->regs[REG_MODE_4] & BIT_H40) { if (context->sprite_index >= MAX_SPRITES_FRAME) { context->sprite_index = 0; return; @@ -393,24 +455,6 @@ context->colors[addr + CRAM_SIZE*2] = color_map[(value & 0xEEE) | FBUF_HILIGHT]; } -#define VRAM_READ 0 //0000 -#define VRAM_WRITE 1 //0001 -//2 would trigger register write 0010 -#define CRAM_WRITE 3 //0011 -#define VSRAM_READ 4 //0100 -#define VSRAM_WRITE 5//0101 -//6 would trigger regsiter write 0110 -//7 is a mystery -#define CRAM_READ 8 //1000 -//9 is also a mystery //1001 -//A would trigger register write 1010 -//B is a mystery 1011 -#define VRAM_READ8 0xC //1100 -//D is a mystery 1101 -//E would trigger register write 1110 -//F is a mystery 1111 -#define DMA_START 0x20 - void external_slot(vdp_context * context) { fifo_entry * start = context->fifo + context->fifo_read; @@ -441,7 +485,7 @@ } case VSRAM_WRITE: if (((start->address/2) & 63) < VSRAM_SIZE) { - //printf("VSRAM Write: %X to %X\n", start->value, context->address); + //printf("VSRAM Write: %X to %X @ vcounter: %d, hslot: %d, cycle: %d\n", start->value, context->address, context->vcounter, context->hslot, context->cycles); context->vsram[(start->address/2) & 63] = start->partial == 2 ? context->fifo[context->fifo_write].value : start->value; } @@ -472,7 +516,7 @@ case 0x40: if (!slot || !is_refresh(context, slot-1)) { cur = context->fifo + context->fifo_write; - cur->cycle = context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)*FIFO_LATENCY; + cur->cycle = context->cycles + ((context->regs[REG_MODE_4] & BIT_H40) ? 16 : 20)*FIFO_LATENCY; cur->address = context->address; cur->value = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]); cur->cd = context->cd; @@ -518,7 +562,7 @@ context->regs[REG_DMALEN_H] = dma_len >> 8; context->regs[REG_DMALEN_L] = dma_len; if (!dma_len) { - //printf("DMA end at cycle %d\n", context->cycles); + //printf("DMA end at cycle %d, frame: %d, vcounter: %d, hslot: %d\n", context->cycles, context->frame, context->vcounter, context->hslot); context->flags &= ~FLAG_DMA_RUN; context->cd &= 0xF; } @@ -567,7 +611,7 @@ if ((column >= left_col && column < right_col) || (line >= top_line && line < bottom_line)) { uint16_t address = context->regs[REG_WINDOW] << 10; uint16_t line_offset, offset, mask; - if (context->latched_mode & BIT_H40) { + if (context->regs[REG_MODE_4] & BIT_H40) { address &= 0xF000; line_offset = (((line) >> vscroll_shift) * 64 * 2) & 0xFFF; mask = 0x7F; @@ -613,7 +657,27 @@ vscroll <<= 1; vscroll |= 1; } - vscroll &= (context->vsram[(context->regs[REG_MODE_3] & BIT_VSCROLL ? (column-2)&63 : 0) + vsram_off] + line); + //TODO: Further research on vscroll latch behavior and the "first column bug" + if (!column) { + if (context->regs[REG_MODE_3] & BIT_VSCROLL) { + if (context->regs[REG_MODE_4] & BIT_H40) { + //Based on observed behavior documented by Eke-Eke, I'm guessing the VDP + //ends up fetching the last value on the VSRAM bus in the H40 case + //getting the last latched value should be close enough for now + if (!vsram_off) { + context->vscroll_latch[0] = context->vscroll_latch[1]; + } + } else { + //supposedly it's always forced to 0 in the H32 case + context->vscroll_latch[0] = context->vscroll_latch[1] = 0; + } + } else { + context->vscroll_latch[vsram_off] = context->vsram[vsram_off]; + } + } else if (context->regs[REG_MODE_3] & BIT_VSCROLL) { + context->vscroll_latch[vsram_off] = context->vsram[column - 2 + vsram_off]; + } + vscroll &= context->vscroll_latch[vsram_off] + line; context->v_offset = vscroll & v_offset_mask; //printf("%s | line %d, vsram: %d, vscroll: %d, v_offset: %d\n",(vsram_off ? "B" : "A"), line, context->vsram[context->regs[REG_MODE_3] & 0x4 ? column : 0], vscroll, context->v_offset); vscroll >>= vscroll_shift; @@ -722,113 +786,144 @@ return; } render_map(context->col_2, context->tmp_buf_b, context->buf_b_off+8, context); - uint16_t *dst; - uint32_t *dst32; + uint32_t *dst; uint8_t *sprite_buf, *plane_a, *plane_b; int plane_a_off, plane_b_off; if (col) { col-=2; - if (context->b32) { - dst32 = context->framebuf; - dst32 += line * 320 + col * 8; - } else { - dst = context->framebuf; - dst += line * 320 + col * 8; - } - sprite_buf = context->linebuf + col * 8; - uint8_t a_src, src; - if (context->flags & FLAG_WINDOW) { - plane_a_off = context->buf_a_off; - a_src = DBG_SRC_W; - } else { - plane_a_off = context->buf_a_off - (context->hscroll_a & 0xF); - a_src = DBG_SRC_A; - } - plane_b_off = context->buf_b_off - (context->hscroll_b & 0xF); - //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); + dst = context->framebuf; + dst += line * 320 + col * 8; + if (context->debug < 2) { + sprite_buf = context->linebuf + col * 8; + uint8_t a_src, src; + if (context->flags & FLAG_WINDOW) { + plane_a_off = context->buf_a_off; + a_src = DBG_SRC_W; + } else { + plane_a_off = context->buf_a_off - (context->hscroll_a & 0xF); + a_src = DBG_SRC_A; + } + plane_b_off = context->buf_b_off - (context->hscroll_b & 0xF); + //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); - if (context->regs[REG_MODE_4] & BIT_HILIGHT) { - for (int i = 0; i < 16; ++plane_a_off, ++plane_b_off, ++sprite_buf, ++i) { - uint8_t pixel; - plane_a = context->tmp_buf_a + (plane_a_off & SCROLL_BUFFER_MASK); - plane_b = context->tmp_buf_b + (plane_b_off & SCROLL_BUFFER_MASK); - uint32_t * colors = context->colors; - src = 0; - pixel = context->regs[REG_BG_COLOR]; - src = DBG_SRC_BG; - if (*plane_b & 0xF) { - pixel = *plane_b; - src = DBG_SRC_B; + if (context->regs[REG_MODE_4] & BIT_HILIGHT) { + for (int i = 0; i < 16; ++plane_a_off, ++plane_b_off, ++sprite_buf, ++i) { + plane_a = context->tmp_buf_a + (plane_a_off & SCROLL_BUFFER_MASK); + plane_b = context->tmp_buf_b + (plane_b_off & SCROLL_BUFFER_MASK); + uint8_t pixel = context->regs[REG_BG_COLOR]; + uint32_t *colors = context->colors; + src = DBG_SRC_BG; + if (*plane_b & 0xF) { + pixel = *plane_b; + src = DBG_SRC_B; + } + uint8_t intensity = *plane_b & BUF_BIT_PRIORITY; + if (*plane_a & 0xF && (*plane_a & BUF_BIT_PRIORITY) >= (pixel & BUF_BIT_PRIORITY)) { + pixel = *plane_a; + src = DBG_SRC_A; + } + intensity |= *plane_a & BUF_BIT_PRIORITY; + if (*sprite_buf & 0xF && (*sprite_buf & BUF_BIT_PRIORITY) >= (pixel & BUF_BIT_PRIORITY)) { + if ((*sprite_buf & 0x3F) == 0x3E) { + intensity += BUF_BIT_PRIORITY; + } else if ((*sprite_buf & 0x3F) == 0x3F) { + intensity = 0; + } else { + pixel = *sprite_buf; + src = DBG_SRC_S; + if ((pixel & 0xF) == 0xE) { + intensity = BUF_BIT_PRIORITY; + } else { + intensity |= pixel & BUF_BIT_PRIORITY; + } + } + } + if (!intensity) { + src |= DBG_SHADOW; + colors += CRAM_SIZE; + } else if (intensity == BUF_BIT_PRIORITY*2) { + src |= DBG_HILIGHT; + colors += CRAM_SIZE*2; + } + + uint32_t outpixel; + if (context->debug) { + outpixel = context->debugcolors[src]; + } else { + outpixel = colors[pixel & 0x3F]; + } + *(dst++) = outpixel; } - if (*plane_a & 0xF && (*plane_a & BUF_BIT_PRIORITY) >= (pixel & BUF_BIT_PRIORITY)) { - pixel = *plane_a; - src = DBG_SRC_A; - } - if (*sprite_buf & 0xF) { - uint8_t sprite_color = *sprite_buf & 0x3F; - if (sprite_color == 0x3E) { - colors += CRAM_SIZE*2; - src |= DBG_HILIGHT; - } else if (sprite_color == 0x3F) { - colors += CRAM_SIZE; - src |= DBG_SHADOW; - } else if ((*sprite_buf & BUF_BIT_PRIORITY) >= (pixel & BUF_BIT_PRIORITY)) { + } else { + for (int i = 0; i < 16; ++plane_a_off, ++plane_b_off, ++sprite_buf, ++i) { + plane_a = context->tmp_buf_a + (plane_a_off & SCROLL_BUFFER_MASK); + plane_b = context->tmp_buf_b + (plane_b_off & SCROLL_BUFFER_MASK); + uint8_t pixel = context->regs[REG_BG_COLOR]; + src = DBG_SRC_BG; + if (*plane_b & 0xF) { + pixel = *plane_b; + src = DBG_SRC_B; + } + if (*plane_a & 0xF && (*plane_a & BUF_BIT_PRIORITY) >= (pixel & BUF_BIT_PRIORITY)) { + pixel = *plane_a; + src = DBG_SRC_A; + } + if (*sprite_buf & 0xF && (*sprite_buf & BUF_BIT_PRIORITY) >= (pixel & BUF_BIT_PRIORITY)) { pixel = *sprite_buf; src = DBG_SRC_S; - if ((pixel & 0xF) == 0xE) { - src |= DBG_SHADOW; - colors += CRAM_SIZE; - } - } - } else if (!((*plane_a | *plane_b) & BUF_BIT_PRIORITY)) { - colors += CRAM_SIZE; - src |= DBG_SHADOW; - } - pixel &= 0x3F; - uint32_t outpixel; - if (context->debug) { - outpixel = context->debugcolors[src]; - } else { - outpixel = colors[pixel]; - } - if (context->b32) { - *(dst32++) = outpixel; - } else { + uint32_t outpixel; + if (context->debug) { + outpixel = context->debugcolors[src]; + } else { + outpixel = context->colors[pixel & 0x3F]; + } *(dst++) = outpixel; } - //*dst = (context->cram[pixel & 0x3F] & 0xEEE) | ((pixel & BUF_BIT_PRIORITY) ? FBUF_BIT_PRIORITY : 0) | src; + } + } else if (context->debug == 2) { + if (col < 32) { + *(dst++) = context->colors[col * 2]; + *(dst++) = context->colors[col * 2]; + *(dst++) = context->colors[col * 2]; + *(dst++) = context->colors[col * 2]; + *(dst++) = context->colors[col * 2 + 1]; + *(dst++) = context->colors[col * 2 + 1]; + *(dst++) = context->colors[col * 2 + 1]; + *(dst++) = context->colors[col * 2 + 1]; + *(dst++) = context->colors[col * 2 + 2]; + *(dst++) = context->colors[col * 2 + 2]; + *(dst++) = context->colors[col * 2 + 2]; + *(dst++) = context->colors[col * 2 + 2]; + *(dst++) = context->colors[col * 2 + 3]; + *(dst++) = context->colors[col * 2 + 3]; + *(dst++) = context->colors[col * 2 + 3]; + *(dst++) = context->colors[col * 2 + 3]; + } else if (col == 32 || line >= 192) { + for (int32_t i = 0; i < 16; i ++) { + *(dst++) = 0; + } + } else { + for (int32_t i = 0; i < 16; i ++) { + *(dst++) = context->colors[line / 3 + (col - 34) * 0x20]; + } } } else { - for (int i = 0; i < 16; ++plane_a_off, ++plane_b_off, ++sprite_buf, ++i) { - plane_a = context->tmp_buf_a + (plane_a_off & SCROLL_BUFFER_MASK); - plane_b = context->tmp_buf_b + (plane_b_off & SCROLL_BUFFER_MASK); - uint8_t pixel = context->regs[REG_BG_COLOR]; - src = DBG_SRC_BG; - if (*plane_b & 0xF) { - pixel = *plane_b; - src = DBG_SRC_B; - } - if (*plane_a & 0xF && (*plane_a & BUF_BIT_PRIORITY) >= (pixel & BUF_BIT_PRIORITY)) { - pixel = *plane_a; - src = DBG_SRC_A; - } - if (*sprite_buf & 0xF && (*sprite_buf & BUF_BIT_PRIORITY) >= (pixel & BUF_BIT_PRIORITY)) { - pixel = *sprite_buf; - src = DBG_SRC_S; - } - uint32_t outpixel; - if (context->debug) { - outpixel = context->debugcolors[src]; - } else { - outpixel = context->colors[pixel & 0x3F]; - } - if (context->b32) { - *(dst32++) = outpixel; - } else { - *(dst++) = outpixel; - } + uint32_t base = (context->debug - 3) * 0x200; + uint32_t cell = base + (line / 8) * (context->regs[REG_MODE_4] & BIT_H40 ? 40 : 32) + col; + uint32_t address = (cell * 32 + (line % 8) * 4) & 0xFFFF; + for (int32_t i = 0; i < 4; i ++) { + *(dst++) = context->colors[(context->debug_pal << 4) | (context->vdpmem[address] >> 4)]; + *(dst++) = context->colors[(context->debug_pal << 4) | (context->vdpmem[address] & 0xF)]; + address++; + } + cell++; + address = (cell * 32 + (line % 8) * 4) & 0xFFFF; + for (int32_t i = 0; i < 4; i ++) { + *(dst++) = context->colors[(context->debug_pal << 4) | (context->vdpmem[address] >> 4)]; + *(dst++) = context->colors[(context->debug_pal << 4) | (context->vdpmem[address] & 0xF)]; + address++; } } } @@ -893,13 +988,15 @@ uint32_t mask; switch(linecyc) { + case 165: + case 166: + external_slot(context); + break; //sprite render to line buffer starts - case 0: - context->cur_slot = MAX_DRAWS-1; - memset(context->linebuf, 0, LINEBUF_SIZE); - case 1: - case 2: - case 3: + case 167: + case 168: + case 169: + case 170: if (line == 0xFF) { external_slot(context); } else { @@ -907,52 +1004,50 @@ } break; //sprite attribute table scan starts - case 4: + case 171: render_sprite_cells( context); - context->sprite_index = 0x80; - context->slot_counter = MAX_SPRITES_LINE; scan_sprite_table(line, context); break; - case 5: - case 6: - case 7: - case 8: - case 9: - case 10: - case 11: - case 12: - case 13: - case 14: - case 15: - case 16: - case 17: - case 18: - case 19: - case 20: + case 172: + case 173: + case 174: + case 175: + case 176: + case 177: + case 178: + case 179: + case 180: + case 181: + case 182: + case 229: + case 230: + case 231: + case 232: + case 233: //!HSYNC asserted - case 21: - case 22: + case 234: + case 235: render_sprite_cells(context); scan_sprite_table(line, context); break; - case 23: + case 236: external_slot(context); break; - case 24: - case 25: - case 26: - case 27: - case 28: - case 29: - case 30: - case 31: - case 32: - case 33: - case 34: + case 237: + case 238: + case 239: + case 240: + case 241: + case 242: + case 243: + case 244: + case 245: + case 246: + case 247: render_sprite_cells(context); scan_sprite_table(line, context); break; - case 35: + case 248: address = (context->regs[REG_HSCROLL] & 0x3F) << 10; mask = 0; if (context->regs[REG_MODE_3] & 0x2) { @@ -967,41 +1062,41 @@ context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; //printf("%d: HScroll A: %d, HScroll B: %d\n", line, context->hscroll_a, context->hscroll_b); break; - case 36: + case 249: //!HSYNC high - case 37: - case 38: - case 39: + case 250: + case 251: + case 252: render_sprite_cells(context); scan_sprite_table(line, context); break; - case 40: + case 253: read_map_scroll_a(0, line, context); break; - case 41: + case 254: render_sprite_cells(context); scan_sprite_table(line, context); break; - case 42: + case 255: render_map_1(context); scan_sprite_table(line, context);//Just a guess break; - case 43: + case 0: render_map_2(context); scan_sprite_table(line, context);//Just a guess break; - case 44: + case 1: read_map_scroll_b(0, line, context); break; - case 45: + case 2: render_sprite_cells(context); scan_sprite_table(line, context); break; - case 46: + case 3: render_map_3(context); scan_sprite_table(line, context);//Just a guess break; - case 47: + case 4: 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 @@ -1011,33 +1106,26 @@ context->sprite_draws = MAX_DRAWS; context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); break; - COLUMN_RENDER_BLOCK(2, 48) - COLUMN_RENDER_BLOCK(4, 56) - COLUMN_RENDER_BLOCK(6, 64) - COLUMN_RENDER_BLOCK_REFRESH(8, 72) - COLUMN_RENDER_BLOCK(10, 80) - COLUMN_RENDER_BLOCK(12, 88) - COLUMN_RENDER_BLOCK(14, 96) - COLUMN_RENDER_BLOCK_REFRESH(16, 104) - COLUMN_RENDER_BLOCK(18, 112) - COLUMN_RENDER_BLOCK(20, 120) - COLUMN_RENDER_BLOCK(22, 128) - COLUMN_RENDER_BLOCK_REFRESH(24, 136) - COLUMN_RENDER_BLOCK(26, 144) - COLUMN_RENDER_BLOCK(28, 152) - COLUMN_RENDER_BLOCK(30, 160) - COLUMN_RENDER_BLOCK_REFRESH(32, 168) - COLUMN_RENDER_BLOCK(34, 176) - COLUMN_RENDER_BLOCK(36, 184) - COLUMN_RENDER_BLOCK(38, 192) - COLUMN_RENDER_BLOCK_REFRESH(40, 200) - case 208: - case 209: - external_slot(context); - break; - default: - //leftovers from HSYNC clock change nonsense - break; + COLUMN_RENDER_BLOCK(2, 5) + COLUMN_RENDER_BLOCK(4, 13) + COLUMN_RENDER_BLOCK(6, 21) + COLUMN_RENDER_BLOCK_REFRESH(8, 29) + COLUMN_RENDER_BLOCK(10, 37) + COLUMN_RENDER_BLOCK(12, 45) + COLUMN_RENDER_BLOCK(14, 53) + COLUMN_RENDER_BLOCK_REFRESH(16, 61) + COLUMN_RENDER_BLOCK(18, 69) + COLUMN_RENDER_BLOCK(20, 77) + COLUMN_RENDER_BLOCK(22, 85) + COLUMN_RENDER_BLOCK_REFRESH(24, 93) + COLUMN_RENDER_BLOCK(26, 101) + COLUMN_RENDER_BLOCK(28, 109) + COLUMN_RENDER_BLOCK(30, 117) + COLUMN_RENDER_BLOCK_REFRESH(32, 125) + COLUMN_RENDER_BLOCK(34, 133) + COLUMN_RENDER_BLOCK(36, 141) + COLUMN_RENDER_BLOCK(38, 149) + COLUMN_RENDER_BLOCK_REFRESH(40, 157) } } @@ -1047,13 +1135,15 @@ uint32_t mask; switch(linecyc) { + case 132: + case 133: + external_slot(context); + break; //sprite render to line buffer starts - case 0: - context->cur_slot = MAX_DRAWS_H32-1; - memset(context->linebuf, 0, LINEBUF_SIZE); - case 1: - case 2: - case 3: + case 134: + case 135: + case 136: + case 137: if (line == 0xFF) { external_slot(context); } else { @@ -1061,46 +1151,44 @@ } break; //sprite attribute table scan starts - case 4: + case 138: render_sprite_cells( context); - context->sprite_index = 0x80; - context->slot_counter = MAX_SPRITES_LINE_H32; scan_sprite_table(line, context); break; - case 5: - case 6: - case 7: - case 8: - case 9: - case 10: - case 11: - case 12: - case 13: + case 139: + case 140: + case 141: + case 142: + case 143: + case 144: + case 145: + case 146: + case 147: render_sprite_cells(context); scan_sprite_table(line, context); - case 14: + case 233: external_slot(context); break; - case 15: - case 16: - case 17: - case 18: - case 19: + case 234: + case 235: + case 236: + case 237: + case 238: //HSYNC start - case 20: - case 21: - case 22: - case 23: - case 24: - case 25: - case 26: + case 239: + case 240: + case 241: + case 242: + case 243: + case 244: + case 245: render_sprite_cells(context); scan_sprite_table(line, context); break; - case 27: + case 246: external_slot(context); break; - case 28: + case 247: address = (context->regs[REG_HSCROLL] & 0x3F) << 10; mask = 0; if (context->regs[REG_MODE_3] & 0x2) { @@ -1115,41 +1203,41 @@ context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; //printf("%d: HScroll A: %d, HScroll B: %d\n", line, context->hscroll_a, context->hscroll_b); break; - case 29: - case 30: - case 31: - case 32: + case 248: + case 249: + case 250: + case 251: render_sprite_cells(context); scan_sprite_table(line, context); break; //!HSYNC high - case 33: + case 252: read_map_scroll_a(0, line, context); break; - case 34: + case 253: render_sprite_cells(context); scan_sprite_table(line, context); break; - case 35: + case 254: render_map_1(context); scan_sprite_table(line, context);//Just a guess break; - case 36: + case 255: render_map_2(context); scan_sprite_table(line, context);//Just a guess break; - case 37: + case 0: read_map_scroll_b(0, line, context); break; - case 38: + case 1: render_sprite_cells(context); scan_sprite_table(line, context); break; - case 39: + case 2: render_map_3(context); scan_sprite_table(line, context);//Just a guess break; - case 40: + case 3: 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 @@ -1159,26 +1247,22 @@ context->sprite_draws = MAX_DRAWS_H32; context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); break; - COLUMN_RENDER_BLOCK(2, 41) - COLUMN_RENDER_BLOCK(4, 49) - COLUMN_RENDER_BLOCK(6, 57) - COLUMN_RENDER_BLOCK_REFRESH(8, 65) - COLUMN_RENDER_BLOCK(10, 73) - COLUMN_RENDER_BLOCK(12, 81) - COLUMN_RENDER_BLOCK(14, 89) - COLUMN_RENDER_BLOCK_REFRESH(16, 97) - COLUMN_RENDER_BLOCK(18, 105) - COLUMN_RENDER_BLOCK(20, 113) - COLUMN_RENDER_BLOCK(22, 121) - COLUMN_RENDER_BLOCK_REFRESH(24, 129) - COLUMN_RENDER_BLOCK(26, 137) - COLUMN_RENDER_BLOCK(28, 145) - COLUMN_RENDER_BLOCK(30, 153) - COLUMN_RENDER_BLOCK_REFRESH(32, 161) - case 169: - case 170: - external_slot(context); - break; + COLUMN_RENDER_BLOCK(2, 4) + COLUMN_RENDER_BLOCK(4, 12) + COLUMN_RENDER_BLOCK(6, 20) + COLUMN_RENDER_BLOCK_REFRESH(8, 28) + COLUMN_RENDER_BLOCK(10, 36) + COLUMN_RENDER_BLOCK(12, 44) + COLUMN_RENDER_BLOCK(14, 52) + COLUMN_RENDER_BLOCK_REFRESH(16, 60) + COLUMN_RENDER_BLOCK(18, 68) + COLUMN_RENDER_BLOCK(20, 76) + COLUMN_RENDER_BLOCK(22, 84) + COLUMN_RENDER_BLOCK_REFRESH(24, 92) + COLUMN_RENDER_BLOCK(26, 100) + COLUMN_RENDER_BLOCK(28, 108) + COLUMN_RENDER_BLOCK(30, 116) + COLUMN_RENDER_BLOCK_REFRESH(32, 124) } } @@ -1203,6 +1287,14 @@ 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); + } for (int i = 0; i < 19; i++) { scan_sprite_table(line, context); @@ -1240,13 +1332,17 @@ read_sprite_x(line, context); } - external_slot(context); - if (context->flags & FLAG_DMA_RUN) { - run_dma_src(context, 0); - } - external_slot(context); + return; } + 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); + } render_sprite_cells(context); render_sprite_cells(context); @@ -1356,57 +1452,63 @@ 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); + context->latched_mode = context->regs[REG_MODE_2] & BIT_PAL; } void check_render_bg(vdp_context * context, int32_t line, uint32_t slot) { - if (line > 0) { - line -= 1; - int starti = -1; - if (context->latched_mode & BIT_H40) { - if (slot >= 55 && slot < 210) { - uint32_t x = (slot-55)*2; - starti = line * 320 + x; - } else if (slot < 5) { - uint32_t x = (slot + 155)*2; - starti = (line-1)*320 + x; - } - } else { - if (slot >= 48 && slot < 171) { - uint32_t x = (slot-48)*2; - starti = line * 320 + x; - } else if (slot < 5) { - uint32_t x = (slot + 123)*2; - starti = (line-1)*320 + x; + int starti = -1; + if (context->regs[REG_MODE_4] & BIT_H40) { + if (slot >= 12 && slot < 172) { + uint32_t x = (slot-12)*2; + starti = line * 320 + x; + } + } else { + if (slot >= 11 && slot < 139) { + uint32_t x = (slot-11)*2; + starti = line * 320 + x; + } + } + if (starti >= 0) { + uint32_t color = context->colors[context->regs[REG_BG_COLOR]]; + uint32_t * start = context->framebuf; + start += starti; + for (int i = 0; i < 2; i++) { + *(start++) = color; + } + } +} + +uint32_t const h40_hsync_cycles[] = {19, 20, 20, 20, 18, 20, 20, 20, 18, 20, 20, 20, 18, 20, 20, 20, 19}; + +void vdp_advance_line(vdp_context *context) +{ + context->vcounter++; + context->vcounter &= 0x1FF; + if (context->flags2 & FLAG2_REGION_PAL) { + if (context->latched_mode & BIT_PAL) { + if (context->vcounter == 0x10B) { + context->vcounter = 0x1D2; } + } else if (context->vcounter == 0x103){ + context->vcounter = 0x1CA; } - if (starti >= 0) { - if (context->b32) { - uint32_t color = context->colors[context->regs[REG_BG_COLOR]]; - uint32_t * start = context->framebuf; - start += starti; - for (int i = 0; i < 2; i++) { - *(start++) = color; - } - } else { - uint16_t color = context->colors[context->regs[REG_BG_COLOR]]; - uint16_t * start = context->framebuf; - start += starti; - for (int i = 0; i < 2; i++) { - *(start++) = color; - } - } - } + } else if (!(context->latched_mode & BIT_PAL) && context->vcounter == 0xEB) { + context->vcounter = 0x1E5; + } + + if (context->vcounter > (context->latched_mode & BIT_PAL ? PAL_INACTIVE_START : NTSC_INACTIVE_START)) { + context->hint_counter = context->regs[REG_HINT]; + } else if (context->hint_counter) { + context->hint_counter--; + } else { + context->flags2 |= FLAG2_HINT_PENDING; + context->pending_hint_start = context->cycles; + context->hint_counter = context->regs[REG_HINT]; } } @@ -1415,126 +1517,68 @@ while(context->cycles < target_cycles) { context->flags &= ~FLAG_UNUSED_SLOT; - uint32_t line = context->cycles / MCLKS_LINE; - uint32_t active_lines = context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE; - if (!context->cycles) { + uint32_t line = context->vcounter; + uint32_t slot = context->hslot; + + if (!line && !slot) { + //TODO: Figure out when this actually happens latch_mode(context); } - uint32_t linecyc = context->cycles % MCLKS_LINE; - if (linecyc == 0) { - if (line <= 1 || line >= active_lines) { - context->hint_counter = context->regs[REG_HINT]; - } else if (context->hint_counter) { - context->hint_counter--; - } else { - context->flags2 |= FLAG2_HINT_PENDING; - context->hint_counter = context->regs[REG_HINT]; + uint32_t inactive_start = context->latched_mode & BIT_PAL ? PAL_INACTIVE_START : NTSC_INACTIVE_START; + + uint8_t is_h40 = context->regs[REG_MODE_4] & BIT_H40; + if (is_h40) { + if (slot == 167) { + context->cur_slot = MAX_DRAWS-1; + memset(context->linebuf, 0, LINEBUF_SIZE); + } else if (slot == 171) { + context->sprite_index = 0x80; + context->slot_counter = MAX_SPRITES_LINE; } - } else if(line == active_lines) { - uint32_t intcyc = context->latched_mode & BIT_H40 ? VINT_CYCLE_H40 : VINT_CYCLE_H32; - if (linecyc == intcyc) { - context->flags2 |= FLAG2_VINT_PENDING; + } else { + if (slot == 134) { + context->cur_slot = MAX_DRAWS_H32-1; + memset(context->linebuf, 0, LINEBUF_SIZE); + } else if (slot == 138) { + context->sprite_index = 0x80; + context->slot_counter = MAX_SPRITES_LINE_H32; } } - uint32_t inccycles, slot; - if (context->latched_mode & BIT_H40){ - if (linecyc < MCLKS_SLOT_H40*HSYNC_SLOT_H40) { - slot = linecyc/MCLKS_SLOT_H40; + if(line == inactive_start) { + uint32_t intslot = context->regs[REG_MODE_4] & BIT_H40 ? VINT_SLOT_H40 : VINT_SLOT_H32; + if (slot == intslot) { + context->flags2 |= FLAG2_VINT_PENDING; + context->pending_vint_start = context->cycles; + } + } + uint32_t inccycles; + //line 0x1FF is basically active even though it's not displayed + uint8_t active_slot = line < inactive_start || line == 0x1FF; + if (is_h40) { + if (slot < HSYNC_SLOT_H40 || slot >= HSYNC_END_H40) { inccycles = MCLKS_SLOT_H40; - } else if(linecyc < MCLK_WEIRD_END) { - switch(linecyc-(MCLKS_SLOT_H40*HSYNC_SLOT_H40)) - { - case 0: - inccycles = 19; - slot = 0; - break; - case 19: - slot = 1; - inccycles = 20; - break; - case 39: - slot = 2; - inccycles = 20; - break; - case 59: - slot = 3; - inccycles = 20; - break; - case 79: - slot = 4; - inccycles = 18; - break; - case 97: - slot = 5; - inccycles = 20; - break; - case 117: - slot = 6; - inccycles = 20; - break; - case 137: - slot = 7; - inccycles = 20; - break; - case 157: - slot = 8; - inccycles = 18; - break; - case 175: - slot = 9; - inccycles = 20; - break; - case 195: - slot = 10; - inccycles = 20; - break; - case 215: - slot = 11; - inccycles = 20; - break; - case 235: - slot = 12; - inccycles = 18; - break; - case 253: - slot = 13; - inccycles = 20; - break; - case 273: - slot = 14; - inccycles = 20; - break; - case 293: - slot = 15; - inccycles = 20; - break; - case 313: - slot = 16; - inccycles = 19; - break; - default: - fprintf(stderr, "cycles after weirdness %d\n", linecyc-(MCLKS_SLOT_H40*HSYNC_SLOT_H40)); - exit(1); - } - slot += HSYNC_SLOT_H40; } else { - slot = (linecyc-MCLK_WEIRD_END)/MCLKS_SLOT_H40 + SLOT_WEIRD_END; - inccycles = MCLKS_SLOT_H40; + inccycles = h40_hsync_cycles[slot-HSYNC_SLOT_H40]; + } + //the first inactive line behaves as an active one for the first 4 slots + if (line == inactive_start && slot > 166 && slot < 171) { + active_slot = 1; } } else { inccycles = MCLKS_SLOT_H32; - slot = linecyc/MCLKS_SLOT_H32; + //the first inactive line behaves as an active one for the first 4 slots + if (line == inactive_start && slot > 166 && slot < 171) { + active_slot = 1; + } } - if ((line < active_lines || (line == active_lines && linecyc < (context->latched_mode & BIT_H40 ? 64 : 80))) && context->regs[REG_MODE_2] & DISPLAY_ENABLE) { - //first sort-of active line is treated as 255 internally - //it's used for gathering sprite info for line - line = (line - 1) & 0xFF; - - //Convert to slot number - if (context->latched_mode & BIT_H40){ - if (!slot && line != (active_lines-1) && (target_cycles - context->cycles) >= MCLKS_LINE) { + uint8_t inc_slot = 1; + if (context->regs[REG_MODE_2] & DISPLAY_ENABLE && active_slot) { + //run VDP rendering for a slot or a line + if (is_h40) { + if (slot == LINE_CHANGE_H40 && line < inactive_start && (target_cycles - context->cycles) >= MCLKS_LINE) { vdp_h40_line(line, context); inccycles = MCLKS_LINE; + inc_slot = 0; } else { vdp_h40(line, slot, context); } @@ -1545,7 +1589,7 @@ if (!is_refresh(context, slot)) { external_slot(context); } - if (line < active_lines) { + if (line < inactive_start) { check_render_bg(context, line, slot); } } @@ -1553,12 +1597,38 @@ run_dma_src(context, slot); } context->cycles += inccycles; + if (inc_slot) { + context->hslot++; + context->hslot &= 0xFF; + if (is_h40) { + if (context->hslot == LINE_CHANGE_H40) { + vdp_advance_line(context); + if (context->vcounter == (inactive_start + 8)) { + context->frame++; + } + } else if (context->hslot == 183) { + context->hslot = 229; + } + } else { + if (context->hslot == LINE_CHANGE_H32) { + vdp_advance_line(context); + if (context->vcounter == (inactive_start + 8)) { + context->frame++; + } + } else if (context->hslot == 148) { + context->hslot = 233; + } + } + + } else { + vdp_advance_line(context); + } } } uint32_t vdp_run_to_vblank(vdp_context * context) { - uint32_t target_cycles = ((context->latched_mode & BIT_PAL) ? PAL_ACTIVE : NTSC_ACTIVE) * MCLKS_LINE; + uint32_t target_cycles = ((context->latched_mode & BIT_PAL) ? PAL_INACTIVE_START : NTSC_INACTIVE_START) * MCLKS_LINE; vdp_run_context(context, target_cycles); return context->cycles; } @@ -1570,7 +1640,7 @@ if (!dmalen) { dmalen = 0x10000; } - uint32_t min_dma_complete = dmalen * (context->latched_mode & BIT_H40 ? 16 : 20); + uint32_t min_dma_complete = dmalen * (context->regs[REG_MODE_4] & BIT_H40 ? 16 : 20); if ((context->regs[REG_DMASRC_H] & 0xC0) == 0xC0 || (context->cd & 0xF) == VRAM_WRITE) { //DMA copies take twice as long to complete since they require a read and a write //DMA Fills and transfers to VRAM also take twice as long as it requires 2 writes for a single word @@ -1606,7 +1676,7 @@ //DMA copy or 68K -> VDP, transfer starts immediately context->flags |= FLAG_DMA_RUN; context->dma_cd = context->cd; - //printf("DMA start at cycle %d\n", context->cycles); + //printf("DMA start (length: %X) at cycle %d, frame: %d, vcounter: %d, hslot: %d\n", (context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L], context->cycles, context->frame, context->vcounter, context->hslot); if (!(context->regs[REG_DMASRC_H] & 0x80)) { //printf("DMA Address: %X, New CD: %X, Source: %X, Length: %X\n", context->address, context->cd, (context->regs[REG_DMASRC_H] << 17) | (context->regs[REG_DMASRC_M] << 9) | (context->regs[REG_DMASRC_L] << 1), context->regs[REG_DMALEN_H] << 8 | context->regs[REG_DMALEN_L]); return 1; @@ -1629,13 +1699,16 @@ if (reg == REG_BG_COLOR) { value &= 0x3F; } + /*if (reg == REG_MODE_4 && ((value ^ context->regs[reg]) & BIT_H40)) { + printf("Mode changed from H%d to H%d @ %d, frame: %d\n", context->regs[reg] & BIT_H40 ? 40 : 32, value & BIT_H40 ? 40 : 32, context->cycles, context->frame); + }*/ context->regs[reg] = value; if (reg == REG_MODE_4) { context->double_res = (value & (BIT_INTERLACE | BIT_DOUBLE_RES)) == (BIT_INTERLACE | BIT_DOUBLE_RES); if (!context->double_res) { context->framebuf = context->oddbuf; } - } + } context->cd &= 0x3C; } } else { @@ -1661,13 +1734,13 @@ context->flags &= ~FLAG_DMA_RUN; } while (context->fifo_write == context->fifo_read) { - vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); + vdp_run_context(context, context->cycles + ((context->regs[REG_MODE_4] & BIT_H40) ? 16 : 20)); } fifo_entry * cur = context->fifo + context->fifo_write; - cur->cycle = context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)*FIFO_LATENCY; + cur->cycle = context->cycles + ((context->regs[REG_MODE_4] & BIT_H40) ? 16 : 20)*FIFO_LATENCY; cur->address = context->address; cur->value = value; - if (context->cd & 0x20 && (context->regs[REG_DMASRC_H] & 0xC0) == 0x80) { + if (context->cd & 0x20 && (context->regs[REG_DMASRC_H] & 0xC0) == 0x80 && (context->regs[REG_MODE_2] & BIT_DMA_ENABLE)) { context->flags |= FLAG_DMA_RUN; } cur->cd = context->cd; @@ -1709,18 +1782,40 @@ if ((context->regs[REG_MODE_4] & BIT_INTERLACE) && context->framebuf == context->oddbuf) { value |= 0x10; } - uint32_t line= context->cycles / MCLKS_LINE; - uint32_t linecyc = context->cycles % MCLKS_LINE; - if (line >= (context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE) || !(context->regs[REG_MODE_2] & BIT_DISP_EN)) { + uint32_t line= context->vcounter; + uint32_t slot = context->hslot; + uint32_t inactive_start = (context->latched_mode & BIT_PAL ? PAL_INACTIVE_START : NTSC_INACTIVE_START); + if ( + ( + line > inactive_start + && line < 0x1FF + ) + || (line == inactive_start + && ( + slot >= (context->regs[REG_MODE_4] & BIT_H40 ? VBLANK_START_H40 : VBLANK_START_H32) + || slot < (context->regs[REG_MODE_4] & BIT_H40 ? LINE_CHANGE_H40 : LINE_CHANGE_H32) + ) + ) + || (line == 0x1FF + && slot < (context->regs[REG_MODE_4] & BIT_H40 ? VBLANK_START_H40 : VBLANK_START_H32)) + && slot >= (context->regs[REG_MODE_4] & BIT_H40 ? LINE_CHANGE_H40 : LINE_CHANGE_H32) + || !(context->regs[REG_MODE_2] & BIT_DISP_EN) + ) { value |= 0x8; } - if (linecyc < (context->latched_mode & BIT_H40 ? HBLANK_CLEAR_H40 : HBLANK_CLEAR_H32)) { - value |= 0x4; + if (context->regs[REG_MODE_4] & BIT_H40) { + if (slot < HBLANK_END_H40 || slot > HBLANK_START_H40) { + value |= 0x4; + } + } else { + if (slot < HBLANK_END_H32 || slot > HBLANK_START_H32) { + value |= 0x4; + } } if (context->flags & FLAG_DMA_RUN) { value |= 0x2; } - if (context->latched_mode & BIT_PAL) {//Not sure about this, need to verify + if (context->flags2 & FLAG2_REGION_PAL) { value |= 0x1; } //printf("status read at cycle %d returned %X\n", context->cycles, value); @@ -1741,7 +1836,7 @@ context->flags &= ~FLAG_UNUSED_SLOT; //context->flags2 |= FLAG2_READ_PENDING; while (!(context->flags & FLAG_UNUSED_SLOT)) { - vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); + vdp_run_context(context, context->cycles + ((context->regs[REG_MODE_4] & BIT_H40) ? 16 : 20)); } uint16_t value = 0; switch (context->cd & 0xF) @@ -1751,7 +1846,7 @@ context->flags &= ~FLAG_UNUSED_SLOT; context->flags2 |= FLAG2_READ_PENDING; while (!(context->flags & FLAG_UNUSED_SLOT)) { - vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); + vdp_run_context(context, context->cycles + ((context->regs[REG_MODE_4] & BIT_H40) ? 16 : 20)); } value |= context->vdpmem[context->address | 1]; break; @@ -1782,102 +1877,8 @@ if (context->regs[REG_MODE_1] & BIT_HVC_LATCH) { return context->hv_latch; } - uint32_t line= context->cycles / MCLKS_LINE; - if (!line) { - line = 0xFF; - } else { - line--; - if (line > 0xEA) { - line = (line + 0xFA) & 0xFF; - } - } - uint32_t linecyc = context->cycles % MCLKS_LINE; - if (context->latched_mode & BIT_H40) { - uint32_t slot; - if (linecyc < MCLKS_SLOT_H40*HSYNC_SLOT_H40) { - slot = linecyc/MCLKS_SLOT_H40; - } else if(linecyc < MCLK_WEIRD_END) { - switch(linecyc-(MCLKS_SLOT_H40*HSYNC_SLOT_H40)) - { - case 0: - slot = 0; - break; - case 19: - slot = 1; - break; - case 39: - slot = 2; - break; - case 59: - slot = 2; - break; - case 79: - slot = 3; - break; - case 97: - slot = 4; - break; - case 117: - slot = 5; - break; - case 137: - slot = 6; - break; - case 157: - slot = 7; - break; - case 175: - slot = 8; - break; - case 195: - slot = 9; - break; - case 215: - slot = 11; - break; - case 235: - slot = 12; - break; - case 253: - slot = 13; - break; - case 273: - slot = 14; - break; - case 293: - slot = 15; - break; - case 313: - slot = 16; - break; - default: - fprintf(stderr, "cycles after weirdness %d\n", linecyc-(MCLKS_SLOT_H40*HSYNC_SLOT_H40)); - exit(1); - } - slot += HSYNC_SLOT_H40; - } else { - slot = (linecyc-MCLK_WEIRD_END)/MCLKS_SLOT_H40 + SLOT_WEIRD_END; - } - linecyc = slot * 2; - if (linecyc >= 86) { - linecyc -= 86; - } else { - linecyc += 334; - } - if (linecyc > 0x16C) { - linecyc += 92; - } - } else { - linecyc /= 10; - if (linecyc >= 74) { - linecyc -= 74; - } else { - linecyc += 268; - } - if (linecyc > 0x127) { - linecyc += 170; - } - } + uint32_t line= context->vcounter & 0xFF; + uint32_t linecyc = context->hslot; linecyc &= 0xFF; if (context->double_res) { line <<= 1; @@ -1897,6 +1898,16 @@ void vdp_adjust_cycles(vdp_context * context, uint32_t deduction) { context->cycles -= deduction; + if (context->pending_vint_start >= deduction) { + context->pending_vint_start -= deduction; + } else { + context->pending_vint_start = 0; + } + if (context->pending_hint_start >= deduction) { + context->pending_hint_start -= deduction; + } else { + context->pending_hint_start = 0; + } if (context->fifo_read >= 0) { int32_t idx = context->fifo_read; do { @@ -1910,25 +1921,129 @@ } } +uint32_t vdp_cycles_hslot_wrap_h40(vdp_context * context) +{ + if (context->hslot < 183) { + return MCLKS_LINE - context->hslot * MCLKS_SLOT_H40; + } else if (context->hslot < HSYNC_END_H40) { + uint32_t before_hsync = context->hslot < HSYNC_SLOT_H40 ? (HSYNC_SLOT_H40 - context->hslot) * MCLKS_SLOT_H40 : 0; + uint32_t hsync = 0; + for (int i = context->hslot <= HSYNC_SLOT_H40 ? 0 : context->hslot - HSYNC_SLOT_H40; i < sizeof(h40_hsync_cycles)/sizeof(uint32_t); i++) + { + hsync += h40_hsync_cycles[i]; + } + uint32_t after_hsync = (256- HSYNC_END_H40) * MCLKS_SLOT_H40; + return before_hsync + hsync + after_hsync; + } else { + return (256-context->hslot) * MCLKS_SLOT_H40; + } +} + +uint32_t vdp_cycles_next_line(vdp_context * context) +{ + if (context->regs[REG_MODE_4] & BIT_H40) { + if (context->hslot < LINE_CHANGE_H40) { + return (LINE_CHANGE_H40 - context->hslot) * MCLKS_SLOT_H40; + } else { + return vdp_cycles_hslot_wrap_h40(context) + LINE_CHANGE_H40 * MCLKS_SLOT_H40; + } + } else { + if (context->hslot < LINE_CHANGE_H32) { + return (LINE_CHANGE_H32 - context->hslot) * MCLKS_SLOT_H32; + } else if (context->hslot < 148) { + return MCLKS_LINE - (context->hslot - LINE_CHANGE_H32) * MCLKS_SLOT_H32; + } else { + return (256-context->hslot + LINE_CHANGE_H32) * MCLKS_SLOT_H32; + } + } +} + +uint32_t vdp_cycles_to_line(vdp_context * context, uint32_t target) +{ + uint32_t jump_start, jump_dst; + if (context->flags2 & FLAG2_REGION_PAL) { + if (context->latched_mode & BIT_PAL) { + jump_start = 0x10B; + jump_dst = 0x1D2; + } else { + jump_start = 0x103; + jump_dst = 0x1CA; + } + } else { + if (context->latched_mode & BIT_PAL) { + jump_start = 0; + jump_dst = 0; + } else { + jump_start = 0xEB; + jump_dst = 0x1E5; + } + } + uint32_t lines; + if (context->vcounter < target) { + if (target < jump_start) { + lines = target - context->vcounter; + } else { + lines = jump_start - context->vcounter + target - jump_dst; + } + } else { + if (context->vcounter < jump_start) { + lines = jump_start - context->vcounter + 512 - jump_dst; + } else { + lines = 512 - context->vcounter; + } + if (target < jump_start) { + lines += target; + } else { + lines += jump_start + target - jump_dst; + } + } + return MCLKS_LINE * (lines - 1) + vdp_cycles_next_line(context); +} + +uint32_t vdp_frame_end_line(vdp_context * context) +{ + uint32_t frame_end; + if (context->flags2 & FLAG2_REGION_PAL) { + if (context->latched_mode & BIT_PAL) { + frame_end = PAL_INACTIVE_START + 8; + } else { + frame_end = NTSC_INACTIVE_START + 8; + } + } else { + if (context->latched_mode & BIT_PAL) { + frame_end = 512; + } else { + frame_end = NTSC_INACTIVE_START + 8; + } + } + return frame_end; +} + +uint32_t vdp_cycles_to_frame_end(vdp_context * context) +{ + return context->cycles + vdp_cycles_to_line(context, vdp_frame_end_line(context)); +} + uint32_t vdp_next_hint(vdp_context * context) { if (!(context->regs[REG_MODE_1] & BIT_HINT_EN)) { return 0xFFFFFFFF; } if (context->flags2 & FLAG2_HINT_PENDING) { - return context->cycles; - } - uint32_t active_lines = context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE; - uint32_t line = context->cycles / MCLKS_LINE; - if (line >= active_lines) { - return 0xFFFFFFFF; + return context->pending_hint_start; } - uint32_t linecyc = context->cycles % MCLKS_LINE; - uint32_t hcycle = context->cycles + context->hint_counter * MCLKS_LINE + MCLKS_LINE - linecyc; - if (!line) { - hcycle += MCLKS_LINE; + uint32_t inactive_start = context->latched_mode & BIT_PAL ? PAL_INACTIVE_START : NTSC_INACTIVE_START; + uint32_t hint_line; + if (context->vcounter + context->hint_counter >= inactive_start) { + if (context->regs[REG_HINT] > inactive_start) { + return 0xFFFFFFFF; + } + hint_line = context->regs[REG_HINT]; + } else { + hint_line = context->vcounter + context->hint_counter + 1; } - return hcycle; + + return context->cycles + vdp_cycles_to_line(context, hint_line); } uint32_t vdp_next_vint(vdp_context * context) @@ -1937,31 +2052,42 @@ return 0xFFFFFFFF; } if (context->flags2 & FLAG2_VINT_PENDING) { - return context->cycles; + return context->pending_vint_start; } - uint32_t active_lines = context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE; - uint32_t vcycle = MCLKS_LINE * active_lines; - if (context->latched_mode & BIT_H40) { - vcycle += VINT_CYCLE_H40; - } else { - vcycle += VINT_CYCLE_H32; - } - if (vcycle < context->cycles) { - return 0xFFFFFFFF; - } - return vcycle; + + + return vdp_next_vint_z80(context); } uint32_t vdp_next_vint_z80(vdp_context * context) { - uint32_t active_lines = context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE; - uint32_t vcycle = MCLKS_LINE * active_lines; - if (context->latched_mode & BIT_H40) { - vcycle += VINT_CYCLE_H40; + uint32_t inactive_start = context->latched_mode & BIT_PAL ? PAL_INACTIVE_START : NTSC_INACTIVE_START; + if (context->vcounter == inactive_start) { + if (context->regs[REG_MODE_4] & BIT_H40) { + if (context->hslot >= LINE_CHANGE_H40) { + return context->cycles + vdp_cycles_hslot_wrap_h40(context) + VINT_SLOT_H40 * MCLKS_SLOT_H40; + } else if (context->hslot <= VINT_SLOT_H40) { + return context->cycles + (VINT_SLOT_H40 - context->hslot) * MCLKS_SLOT_H40; + } + } else { + if (context->hslot >= LINE_CHANGE_H32) { + if (context->hslot < 148) { + return context->cycles + (VINT_SLOT_H32 + 148 - context->hslot + 256 - 233) * MCLKS_SLOT_H32; + } else { + return context->cycles + (VINT_SLOT_H32 + 256 - context->hslot) * MCLKS_SLOT_H32; + } + } else if (context->hslot <= VINT_SLOT_H32) { + return context->cycles + (VINT_SLOT_H32 - context->hslot) * MCLKS_SLOT_H32; + } + } + } + int32_t cycles_to_vint = vdp_cycles_to_line(context, inactive_start); + if (context->regs[REG_MODE_4] & BIT_H40) { + cycles_to_vint += MCLKS_LINE - (LINE_CHANGE_H40 - VINT_SLOT_H40) * MCLKS_SLOT_H40; } else { - vcycle += VINT_CYCLE_H32; + cycles_to_vint += (VINT_SLOT_H32 + 148 - LINE_CHANGE_H32 + 256 - 233) * MCLKS_SLOT_H32; } - return vcycle; + return context->cycles + cycles_to_vint; } void vdp_int_ack(vdp_context * context, uint16_t int_num)