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@ -7,6 +7,21 @@ I decided to reverse engineer it just for fun, and maybe to build a better varia
![Screenshot of the traced PCB](pics/traced_board.jpg)
## Hardware
### Memory map and protocol
Information on the protocol can be found [here](https://psx-spx.consoledev.net/cheatdevices/#cheat-devices-datel-io), but here is the basic memory map of this device:
```
1F000000h-1F01FFFFh R/W Flash (first 128K)
1F020010h R Comms Link STB pin state (bit0)
1F020018h R Switch Setting (bit0: 0=Off, 1=On)
1F040000h-1F05FFFFh R/W Flash (second 128K)
1F060000h R Comms Link data in (byte)
1F060008h W Comms Link data out (byte, pulses ACK to Comms Link)
```
## Notes
The PCB was fully disassembled, scanned, and traced to reconstruct the schematic.