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paulrickards, to retrocomputing
@paulrickards@mastodon.social avatar

maintenance today. My HP 7585B stopped responding over RS-232. Diagnostics revealed a problem with the interface card. Luckily I have a spare machine that can donate a new working card!

paulrickards,
@paulrickards@mastodon.social avatar

And it works! Here’s a video of the HP 7585B plotting a big arc Truchet tile design using three colors (yellow, cyan, and magenta) on 11x15 watercolor. Total time 1h15m.

Warning: sound may have loud clicks/taps!

Video montage of a HP 7585 plotting a design of large concentric arcs broken up by squares in cyan, yellow, and magenta. It performs tool changes to swap pens automatically.

paulrickards,
@paulrickards@mastodon.social avatar

@tonymasiello Thanks! It's a beast of a machine. Extremely heavy, cast and extruded metal case and stand. First one I got in 2018 which I had to repair it (link to blog below). It developed a more serious issue that I haven't puzzled out yet so it's a parts machine for the moment. The second one I got a few years later.

https://biosrhythm.com/?p=2722

paulrickards,
@paulrickards@mastodon.social avatar

@vga256 Yeah it howls! It's a single large fan. I've already had to replace the one in my EXL. I just got the exact replacement. Can it be replaced any any kind of fan? The plotter controls the speed.

paulrickards,
@paulrickards@mastodon.social avatar

@tehstu It is remarkable that it works so well, especially considering it will change pens automatically and continue with the same prevision. It can also draw much faster than is shown here as well (I slowed it down to get good sharp lines).

paulrickards,
@paulrickards@mastodon.social avatar
paulrickards,
@paulrickards@mastodon.social avatar

@harpaa01 It’s very mesmerizing to watch while it works. I’ve heard of those card kiosks but never seen one in person. Sounds like a good deal- you get a card plus entertainment! 😊

NanoRaptor, to random
@NanoRaptor@bitbang.social avatar

What are some numbers in your field that anyone else in the field would identify without even thinking about it, but folk outside may have no idea. Just the numbers, no explanations. Yet.

105 148 210 297 420 594 841 1189

paulrickards,
@paulrickards@mastodon.social avatar

@NanoRaptor 110, 300, 1200, 2400, 9600, 14400, 19200, 28800, 38400, 57600, 115200

paulrickards,
@paulrickards@mastodon.social avatar

@NanoRaptor 49152, 53280, 53281, 64738

paulrickards, to retrocomputing
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paulrickards,
@paulrickards@mastodon.social avatar

@tech10 Yep, it was a serial date and time clock, used when computers didn't have a time of day clock on board.

I made an adapter board that turns it into a stand alone NTP clock.

You can read about both:

https://biosrhythm.com/?p=1546

paulrickards,
@paulrickards@mastodon.social avatar

@therieau 😎

paulrickards,
@paulrickards@mastodon.social avatar

@rickt137 Super cool! Those were the days. Were they individual modems are was it a rack mount box with multiple modems built in?

paulrickards,
@paulrickards@mastodon.social avatar

@arcadeshopper That's the stuff right there!

sharewarewolf, to free
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paulrickards,
@paulrickards@mastodon.social avatar

@sharewarewolf I'd love to give the Amy a new home here!

paulrickards,
@paulrickards@mastodon.social avatar

@scott @sharewarewolf I just happen to be looking at my timeline at the right moment I guess!

sharewarewolf, to free
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paulrickards,
@paulrickards@mastodon.social avatar

@sharewarewolf Oh can I take that? Thanks!

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