Differences
This shows you the differences between two versions of the page.
| Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
| memory_map [2021/09/05 18:09] – [Timers] simer | memory_map [2021/09/21 21:53] – [IO special functions and usage] Removed incorrect data about io mappings. pulkomandy | ||
|---|---|---|---|
| Line 6: | Line 6: | ||
| | 0x003000 | | 0x003000 | ||
| | 0x003D00 | | 0x003D00 | ||
| - | | 0x003e00 | + | | 0x003E00 |
| External memory starts at 0x4000. It can be mapped to the internal ROM and the two possible chips in the cartridges. | External memory starts at 0x4000. It can be mapped to the internal ROM and the two possible chips in the cartridges. | ||
| Line 44: | Line 44: | ||
| If the attribute bit is 1, there is no inversion, and the data bit is output as is. | If the attribute bit is 1, there is no inversion, and the data bit is output as is. | ||
| - | |||
| - | ===== IO special functions and usage ===== | ||
| - | |||
| - | FIXME this does not match the info from the V.Smile motion schematics (see [[IO]] page). Where does this info come from (except from bmx spreadsheet) and which is correct? | ||
| - | |||
| - | * IOA15: act | ||
| - | * IOA14-0: 15 bit RGB | ||
| - | * IOA15: SCK | ||
| - | * IOA14: SDA | ||
| - | * IOA13: SWS | ||
| - | * IOA12: CKV | ||
| - | * IOA11: FM | ||
| - | * IOA10: FP | ||
| - | * IOA9: LP | ||
| - | * IOA8: CP | ||
| - | * IOA7-0: D7-0 | ||
| - | * IOC15: SPI clock | ||
| - | * IOC14: RX | ||
| - | * IOC13: TX | ||
| - | * IOC12: SPI SSB | ||
| - | * IOC11: TFT Clock | ||
| - | * IOC10: timebase 1 | ||
| - | * IOC9: TAPWM | ||
| - | * IOC8: VSYNC | ||
| - | * IOC7: HSYNC | ||
| - | * IOC1: timebase 2 / external clock 1 input | ||
| - | * IOC0: TBPWM / external clock 2 input | ||
| Line 160: | Line 133: | ||
| | 3D2D | Pseudo Random2 | | 3D2D | Pseudo Random2 | ||
| | 3D2E | FIQ Sel | | 3D2E | FIQ Sel | ||
| - | | 3D2F | DS register | + | | 3D2F | DS register |
| ===== System control ===== | ===== System control ===== | ||
