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