Hardware Amendments

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MArk1 PCBs have had a few a few small amendments made at the factory, if you ever need to repair your machine then please take this into account that there are 3 trace cuts that must be left in place and are not faults.

An Addition has been added to the MArk1 System that allows you to Write to VRAM from the CPU, The schematics are bellow and much be in btween the Data Lines of the Tester Connect A and the CPU Socket Data Lines.