This is it more or less. Another 15 to 30 minutes to fill in the blanks.
QB has an ON TIMER(n) GOSUB UpdatesScreen ....   hard ware,  real time interrupt.
n is the number of seconds. For updating the screen every one or two seconds is about right.

Actully updating the screen only takes a few usec. The rest of the time the computer
is doing EFI stuff.

Here are some shots of the computer. The mother board is mounted on a .125 inch
thick plate with the 3.5" floppy and hard drive are bolted to the bottom.
Everything fits in about a seven inch cube. Very rugged chassis.

Paul Lamar

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