This is an old revision of the document!
Introduction
The 6850 is a serial port controller. It is used on Thomson TO machines to connect the keyboard to other parts of the system, allowing a detachable keyboard on the TO9 and TO9+.
Registers
| Address | Name | Description |
|---|---|---|
| E7DE | SCR/SSDR | Control (write)/Status (read) |
| E7DF | STDR/SRDR | Data transmit/receive |
