github.com/bkw777/Z88_RS232

This plugs in to the serial port on a Cambridge Z88 (which has a non-standard pinout), and provides a serial port with the same wiring pinout and physical connector as the Kyotronic KC-85 clone machines. (TRS-80 Model 100, 102, 200, NEC PC-8201, PC-8300, Olivetti M10, Kyotronic KC-85)

The Model 100 serial port is also slightly non-standard by todays standards, only in that it’s DTE yet female, but this connection allows the Z88 to use any Model 100 peripherals directly with the same cable as used for the Model 100 without any further adapters.

Particularly, the cable that comes with a Tandy Portable Disk Drive is a special cable with transistors embeded inside the plug, and IT has a male DB25 plug meant to plug directly into a Model 100. This adapter allows you to connect the TPDD to a Z88 using the official/original cable.

github.com/bkw777/Z88_RS232

The converts the non-standard serial port on a Cambridge Z88 to a standard RS-232 port. (9 pin, male, DTE)

github.com/bkw777/Geoff_vt100

This is a modified version of Geoff’s vt100 serial terminal with slightly reorganized layout, smaller pcb size, and no PS/2 port. The firmware will need to be modified to use usb instead of PS/2 for the keyboard. This has not been done and I may never do it.

This is probably electrically correct, but has NOT been tested.

github.com/bkw777/BCR_Breakout

USB 5v power from the BCR port on “Model T” computers.
TRS-80/TANDY Model 100, 102, 200
NEC PC-8201, PC-8201a, PC-8300
Olivetti M10

https://github.com/bkw777/BCR_Breakout

Breakout board for the BCR port on “Model T” computers.
TRS-80/TANDY Model 100, 102, 200
NEC PC-8201, PC-8201a, PC-8300
Olivetti M10