M100ROM: TRS-80 Model 100 Main and Option ROM adapter
author: twospruces
2 layer board of 0.91 x 1.65 inches (23.1 x 41.9 mm)
Uploaded:
February 11th 2015
Shared:
March 9th 2018
Total Price:
$7.50
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
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
