System-4 Memory Card

This is the top view of the 24K memory card, only 16K is populated. The jumpers on the card are for setting card location within the address space, the need for more memory never materialized. http://cottageworker.com/wp-content/uploads/2014/05/ The Bottom of the memory card. Back then building a computer was a little like knitting a sweater, the […]

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System-4

This is the last of several 1802 based systems I built between 1978 and 1983. This system like all “real” computers has a system bus and separate Front Panel,CPU, Memory, and Video cards. The original system used an Apple parallel keyboard that was damaged many house moves ago. Last year the system was modified to […]

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