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

author: twospruces
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2 layer board of 0.91 x 1.65 inches (23.1 x 41.9 mm)
Uploaded: February 11, 2015
Shared: March 09, 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

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      Since this is a project designed by a community member, it may contain design errors that prevent it from working as intended. OSH Park cannot place any guarantees about the functionality or correctness of the design.
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