The first SwTPC computer. Based on the Motorola 6800 microprocessor, it featured a startup program (or monitor) in ROM, instead of a front panel covered with switches and lights; and a price that put it within reach of hobbyists. The monitor ROM brought two clear advantages: the machine could do something immediately after powering up; and the cost of the machine was reduced by not needing all those switches and lights. In comparison, other machines of the time needed to have a machine-code program entered by hand, in binary, after each power-up.

This machine also gets the credit for the initial definition of the SS-50 bus.

catalog page

The monitor ROM was called "SWTBug". The most common use of the monitor ROM was to bootstrap into a disk operating system, such as DOS-68.

The documentation was in a gold-colored 3-ring binder.


(remove all "x"s to get a valid address)