M100ROM: TRS-80 Model 100 Main and Option ROM adapter

2 layer board of 0.91x1.65 inches (23.14x41.94 mm).
Shared on March 28th, 2015 14:33.

ROM adapter for M100 my Mike Stein

see

http://bitchin100.com/wiki/index.php?title=M100ROM

This is an adapter board for TRS-80 Model 100. There are three use cases-

a) Early M100 - allow user to install an updated Main ROM using a 27C256

b) Early M100 - allow user to install an updated Main ROM and an Option ROM using a 27C512

c) Late M100 - allow user to install an updated Main ROM and an Option ROM using a 27C512 (because a late M100 is compatible with 27C256)

What you need-

soldering skills and equipment!

2 x 1N4148 or similar diodes, 1 x 10k leaded resistor

28 pins for adapting the board to the socket

either a 27C256 or 27C512, properly programmed

Order board. Download. Permalink. Embed order link.