My Hardware Test & Development System
I have a Micromint SB180 enclosure which I use for doing hardware testing and development.
I use it without the cover, with the board-under-test perched on top for easy access. It
has two 48 track TEAC floppies, but I usually only use one of them. No hard disk at this
The picture below shows the system, with my 22MHz SB180
on it. Looking closely you
will see a small blue wire coming out between the SB180 board and the memory board, with
a small loop in the end. This wire is attached to the printer port strobe pin. I use the
strobe signal in my benchmarking program as a start-stop pulse for timing. This way I can
tell if the system clock is actually running at the frequency I am expecting.
The "dead bug" chip beside the floppy is a 7474 flip-flop, pulled from the SB180 U15 socket.
It was the chip that inserted the one hardware wait-state for instruction fetches. It is
no longer needed... :)
Click on a thumbnail-image for a larger image.
|My Test/Developement System