TKB Documentation
Teensy 4.0 interface for IBM Wheelwriter 6 typewriter via Option Interface port.
- Wheelwriter Bus Protocol — full protocol reference (commands, timing, printwheel tables)
- Teensy 4.0 Pinout — pin mapping, serial/SPI/I2C ports, power
- Teensy 9-bit UART — UART configuration for Wheelwriter bus
- Wiring Schematic — level shifter and Option Interface wiring