MMIO register table/PPU
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See: MMIO register table
| Name | Address | Bits | Type | Notes |
|---|---|---|---|---|
| INIDISP | $2100 | F... BBBB | W8 | Forced blanking (F), screen brightness (B). |
| OBJSEL | $2101 | SSSN NbBB | W8 | OBJ sprite size (S), name secondary select (N), name base address (B). |
| OAMADDL OAMADDH |
$2102 $2103 |
AAAA AAAA P... ...B |
W16 | OAM word address (A). Priority rotation (P), address high bit (B). |
| OAMDATA | $2104 | DDDD DDDD | W8x2 | OAM data write byte (2x for word) (D), increments OAMADD byte. |
| BGMODE | $2105 | 4321 PMMM | W8 | Tilemap tile size (#), BG3 priority (P), BG mode (M). |
| MOSAIC | $2106 | SSSS 4321 | W8 | Mosaic size (S), mosaic BG enable (#). |
| BG1SC BG2SC BG3SC BG4SC |
$2107 $2108 $2109 $210A |
AAAA AAYX | W8 | Tilemap VRAM address (A), vertical tilemap count (Y), horizontal tilemap count (X). |
| BG12NBA | $210B | BBBB AAAA | W8 | BG2 CHR base address (B), BG1 CHR base address (A). |
| BG34NBA | $210C | DDDD CCCC | W8 | BG4 CHR base address (D), BG3 CHR base address (C). |
| BG1HOFS M7HOFS BG1VOFS M7VOFS |
$210D $210E |
.... ..XX XXXX XXXX ...x xxxx xxxx xxxx .... ..YY YYYY YYYY ...y yyyy yyyy yyyy |
W8x2 W8x2 W8x2 W8x2 |
BG1 horizontal scroll (X). Mode 7 horizontal scroll (x). BG1 vertical scroll (Y). Mode 7 vertical scroll (y). |
| BG2HOFS BG2VOFS BG3HOFS BG3VOFS BG4HOFS BG4VOFS |
$210F $2110 $2111 $2112 $2113 $2114 |
.... ..XX XXXX XXXX .... ..YY YYYY YYYY |
W8x2 W8x2 |
BG horizontal scroll (X). BG vertical scroll (Y). |
| VMAIN | $2115 | M... RRII | W8 | VRAM address increment mode (M), remapping (R), increment size (I). |
| VMADDL VMADDH |
$2116 $2117 |
LLLL LLLL hHHH HHHH |
W16 | VRAM word address. |
| VMDATAL VMDATAH |
$2118 $2119 |
LLLL LLLL HHHH HHHH |
W16 | VRAM data write. Increments VMADD after write according to VMAIN setting. |
| M7SEL | $211A | RF.. ..YX | W8 | Mode 7 tilemap repeat (R), fill (F), flip vertical (Y), flip horizontal (X). |
| M7A | $211B | DDDD DDDD dddd dddd | W8x2 | Mode 7 matrix A or signed 16-bit multiplication factor. |
| M7B | $211C | DDDD DDDD dddd dddd | W8x2 | Mode 7 matrix B or signed 8-bit multiplication factor. |
| M7C | $211D | DDDD DDDD dddd dddd | W8x2 | Mode 7 matrix C |
| M7D | $211E | DDDD DDDD dddd dddd | W8x2 | Mode 7 matrix D |
| M7X | $211F | ...X XXXX XXXX XXXX | W8x2 | Mode 7 center X |
| M7Y | $2120 | ...Y YYYY YYYY YYYY | W8x2 | Mode 7 center Y |
| CGADD | $2121 | AAAA AAAA | W8 | CGRAM word address. |
| CGDATA | $2122 | .BBB BBGG GGGR RRRR | W8x2 | CGRAM data write, increments CGADD byte address after each write. |
| W12SEL | $2123 | DdCc BbAa | W8 | Enable (ABCD) and Invert (abcd) windows for BG1 (AB) and BG2 (CD). |
| W34SEL | $2124 | DdCc BbAa | W8 | Enable (EFGH) and Invert (efgh) windows for BG3 (EF) and BG2 (GH). |
| WOBJSEL | $2125 | LlKk JjIi | W8 | Enable (IJKL) and Invert (ijkl) windows for OBJ (IJ) and color (KL). |
| WH0 | $2126 | LLLL LLLL | W8 | Window 1 left position. |
| WH1 | $2127 | RRRR RRRR | W8 | Window 1 right position. |
| WH2 | $2128 | LLLL LLLL | W8 | Window 2 left position. |
| WH3 | $2129 | RRRR RRRR | W8 | Window 2 right position. |
| WBGLOG | $212A | 4433 2211 | W8 | Window mask logic for BG layers (00=OR, 01=AND, 10=XOR, 11=XNOR). |
| WOBJLOG | $212B | .... CCOO | W8 | Window mask logic for OBJ (O) and color (C). |
| TM | $212C | ...O 4321 | W8 | Main screen layer enable (PPU registers#). |
| TS | $212D | ...O 4321 | W8 | Sub screen layer enable (#). |
| TMW | $212E | ...O 4321 | W8 | Main screen layer window enable. |
| TSW | $212F | ...O 4321 | W8 | Sub screen layer window enable. |
| CGWSEL | $2130 | MMSS ..AD | W8 | main/sub screen color window black/transparent regions (MS), fixed/subscreen (A), direct color (D). |
| CGADSUB | $2131 | MHBO 4321 | W8 | Color math add/subtract (M), half (H), backdrop (B), layer enable (O4321). |
| COLDATA | $2132 | BGRC CCCC | W8 | Fixed color channel select (BGR) and value (C). |
| SETINI | $2133 | EX.. HOiI | W8 | External sync (E), EXTBG (X), Hi-res (H), Overscan (O), OBJ interlace (i), Screen interlace (I). |
| MPYL MPYM MPYH |
$2134 $2135 $2136 |
LLLL LLLL MMMM MMMM HHHH HHHH |
R24 | 24-bit signed multiplication result. |
| SLHV | $2137 | .... .... |
R8 | Software latch for H/V counters. |
| OAMDATAREAD | $2138 | DDDD DDDD |
R8 | Read OAM data byte, increments OAMADD byte. |
| VMDATALREAD VMDATAHREAD |
$2139 $213A |
LLLL LLLL HHHH HHHH |
R16 | VRAM data read. Increments VMADD after read according to VMAIN setting. |
| CGDATAREAD | $213B | .BBB BBGG GGGR RRRR | R8x2 | CGRAM data read, increments CGADD byte address after each write. |
| OPHCT | $213C | ...H HHHH HHHH HHHH | R8x2 | Output horizontal counter. |
| OPVCT | $213D | ...V VVVV VVVV VVVV | R8x2 | Output vertical counter. |
| STAT77 | $213E | TRM. VVVV |
R8 | Sprite overflow (T), sprite tile overflow (R), master/slave (M), PPU1 version (V). |
| STAT78 | $213F | FL.M VVVV |
R8 | Interlace field (F), counter latch value (L), NTSC/PAL (M), PPU2 version (V). |
