System 1

This is the first of many in a long line of 1802 based projects. This is basic design but it does the support an 1861 video chip, cassette I/O. The whole system is built with point to point wiring on Vero board. Unfortunately this system is no longer functional

Every “real” computer needs a proper front panel

Side and top view of system. The first card is the CPU card, the second is the interface to the front panel subsystem and the third is a 256 byte memory card. The motherboard also contains a few bits of the circuitry.

4K byte memory card, the point to point wiring construction is much neater on this one.

256 byte memory card with a switch to select bus or external power. Note power connector on right side of card. How many times can one person toggle in that monitor program!