In article <BLU178-W39DE4EDF5789DC4D21309AA3230 at phx.gbl>,
dwight elvey <dkelvey at hotmail.com> writes:
I suspect it executes HP1351A machine language.
There is no such thing. It's just a couple of state machines, one for
handling the I/O traffic and producing a display list in RAM and another
for walking the display list to generate a dynamic vector graphic
image.
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