Teeprom
Parts
PCB & Carrier: https://www.pcbway.com/project/shareproject/Teeprom___Writable_option_rom_for_TRS_80_Model_100__102__200.html
BOM: https://www.digikey.com/short/thq5fbr0
Programming
To write the eeprom, you need:
- Programmer such as TL866
- SOIC-28 test clip such as Pomona 5437, AP/3M 923660-28, AP/3M 923665-28
- dip-28 socket
- 28 jumper wires with male pins on one end and female Dupont style sockets on the other end.
- rom image files
Put the female ends of the wires onto the test clip.
Put the male ends of the wires into the dip28 socket.
Put the dip28 socket into the programmer.
Remove the Teeprom from the Model 100/102/200
Clip the test clip onto the chip on the Teeprom module.
4ROM
4-bank module that fits in the socket and holds 4 rom images.
https://github.com/bkw777/Teeprom/blob/master/4ROM.md
Sources
PCB: http://github.com/bkw777/Teeprom
Carrier: http://github.com/bkw777/Molex78802_Module
The PCB should have ENIG copper finish for gold plated edge contacts.
The carrier should be printed with SLS or MJF.