F256
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F256 Jr - 816E Memory Map
| Start | Stop | Description |
| $00_0000 | $07_FFFF | 512k RAM (but see next entry). |
| $00_FF00 | $00_FFFF | $F8_FF00-$F8_FFFF when the Boot-to-Flash jumper is set. |
| $08_0000 | $EF_FFFF | Not used. |
| $F0_0000 | $F0_7FFF | I/O, see next table. |
| $F0_8000 | $F3_FFFF | Not used. |
| $F4_0000 | $F7_FFFF | 256k Cartridge RAM/FLASH/IO |
| $F8_0000 | $FF_FFFF | 512K FLASH. |
F256 Jr - 816E I/O Map
| Start | Stop | Description |
| $F0_0000 | $F0_03FF | Gamma Table Blue |
| $F0_0400 | $F0_07FF | Gamma Table Green |
| $F0_0800 | $F0_0BFF | Gamma Table Red |
| $F0_0C00 | $F0_0FFF | Mouse Graphic |
| $F0_1000 | $F0_10FF | TinyVICKY Master Control Registers |
| $F0_1100 | $F0_11FF | TinyVICKY Bitmap Control Registers |
| $F0_1200 | $F0_12FF | TinyVICKY Tile Control Registers |
| $F0_1300 | $F0_13FF | Reserved |
| $F0_1400 | $F0_141F | SID LEFT |
| $F0_1480 | $F0_149F | SID MONO |
| $F0_1500 | $F0_151F | SID RIGHT |
| $F0_1580 | $F0_1580 | OPL3 Address Register Low (K Only) |
| $F0_1581 | $F0_1581 | OPL3 Data Register (K Only) |
| $F0_1582 | $F0_1582 | OPL3 Address Register Hi (K Only) |
| $F0_1600 | $F0_1607 | PSG LEFT |
| $F0_1608 | $F0_160F | PSG MONO |
| $F0_1610 | $F0_161F | PSG RIGHT |
| $F0_1620 | $F0_162F | CODEC |
| $F0_1630 | $F0_163F | UART |
| $F0_1640 | $F0_164F | PS2 |
| $F0_1650 | $F0_165F | TIMERS |
| $F0_1660 | $F0_166F | INT CTRL |
| $F0_1670 | $F0_167F | DIP SW |
| $F0_1680 | $F0_168F | IEC Controller |
| $F0_1690 | $F0_169F | RTC |
| $F0_16A0 | $F0_16AF | System Control Registers |
| $F0_16B0 | $F0_16DF | Reserved |
| $F0_16E0 | $F0_16EA | Mouse Pointer Registers |
| $F0_16EB | $F0_16EF | PCB Version Registers |
| $F0_16F0 | $F0_17FF | Reserved |
| $F0_1800 | $F0_183F | Text Foreground Color |
| $F0_1840 | $F0_187F | Text Background Color |
| $F0_1880 | $F0_18FF | NES/SNES Joystick |
| $F0_1900 | $F0_1AFF | VICKY Sprite Control Registers |
| $F0_1B00 | $F0_1BFF | 65C22 VIA1 Control Registers (K Only) |
| $F0_1C00 | $F0_1CFF | 65C22 VIA0 Control Registers |
| $F0_1D00 | $F0_1DFF | SD Card Controller |
| $F0_1E00 | $F0_1E1F | Integer Math Copro |
| $F0_1E20 | $F0_1EFF | Reserved |
| $F0_1F00 | $F0_1FFF | DMA Controller |
| $F0_2000 | $F0_27FF | TEXT FONT Set 0 |
| $F0_2800 | $F0_2FFF | TEXT FONT Set 1 |
| $F0_3000 | $F0_33FF | GRAPHICS COLOR LUT 0 |
| $F0_3400 | $F0_37FF | GRAPHICS COLOR LUT 1 |
| $F0_3800 | $F0_3BFF | GRAPHICS COLOR LUT 2 |
| $F0_3C00 | $F0_3FFF | GRAPHICS COLOR LUT 3 |
| $F0_4000 | $F0_5FFF | TEXT Memory |
| $F0_6000 | $F0_7FFF | COLOR Memory |
