When repairing or restoring an Einstein  enthusiasts often use a special diagnostic ROM/EPROM — a custom-programmed EPROM for the TC01 that contains test routines rather than the standard MOS. You insert this in an available ROM socket (or replace the original) to help diagnose hardware faults (CPU, RAM, I/O, etc.).

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This diagnostic EPROM is not a standard “built-in” part of the original machine, but rather a piece of homebrew community firmware created to assist with testing and repair.

You can down load the images from Gifhub to start the journey.

The link is shown below:

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https://github.com/fdivitto/TatungEinst ... icFirmware

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Please check out our guide for more details on creating an image on a EPROM chip for the Tatung Einstein TC01. and 256 computers.

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A disk image of the diagnostic from the Factory for the TC01 & 256 will be available soon.