We’ve all at some point or other seen something done by somebody else, and thought “I’d like to have a go at that!”. When [Phooky] saw the artwork on the #PlotterTwitter hashtag, he remembered a past donation of a plotter to the NYC Resistor hackerspace. Some searching through the loft revealed a dusty cardboard box containing not the lovely Hewlett-Packard he’d hoped for, but instead an Apple 410 Color Plotter. This proved to be such an obscure of the legacy Apple product line that almost no information was available for it for a few diagrams showing DIP switch settings for the serial port.

Undeterred, he took a look inside and found a straightforward enough control board featuring a Z80 processor and support chips with 983 date codes. The ROMs were conveniently socketed, so after dumping their contents, he was able to identify the routine for the plotter’s test program, and thus work from there to deduce its command set.  A small matter of the plotter using hardware handshaking lines to signal a full buffer later, and he was able to use it to produce beautiful plots. Should you be one of the lucky few remaining Apple 40 owners, you may find his software library for it to be of some use.

If you’d like to see some more aged plotter on these pages, we’ve had an analog Hewlett Packard here in the past, as well as a vintage drum plotter.

Thanks [Sophi] for the tip.

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