Gregory's Server
Tube🌱Time
you know how the rev A 6502 from 1975 had a bug in ROR? turns out not to be true. https://youtu.be/Uk_QC1eU0Fg
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Tube🌱Time
i've reverse engineered most of the Game Blaster, Creative's very first sound card. check it out. https://github.com/schlae/game-blaster
Tube🌱Time
the challenge remaining is the mystery chip. it could be a gate array device, but i suspect it's off the shelf.
Manawyrm | Sarah
@tubetime huh, how does this relate to MUS-1099: I guess this is missing the ID logic? I built one of those cards and it's working pretty well (for Scumm-games at least): https://www.youtube.com/watch?v=bSW95JPUE4k
Tube🌱Time
what is this chip? the pinout is similar to a 6520 PIA. the DBx lines are bidirectional and connect to an 8-bit CPU or MCU data bus. pins 21-29 are control lines, maybe chip select, internal address, etc. there's a chance it is a PLA, but I don't know of any in a 40-DIP package. it also reminds me of some of the 82Cxx interface chips. 
Tube🌱Time
hey if you want better news coverage of that dang balloon, follow @Stratoballoon on the birdsite. bet you didn't know a similar balloon just overflow costa rica. 
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Marten Electric
@tubetime No clue, but here in the UK the choice of weapon are the bloody wood screws.
Tube🌱Time
i've heard a lot about this MS-DOS thing, and i want to give it a try. my Apple IIe Platinum should be perfect for this, right?
Tube🌱Time
and i've got an MS-DOS 5 boot disk. it says there is BASIC on it as well, so i'll give that a try
Tube🌱Time
Tektronix used to have their own CRT fabrication shop (the Engineering Tube Lab) for building prototypes for oscilloscopes under development. apparently, as a joke, they made two CRTs out of old coke bottles. named the Coketron, natch.
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Squozen 🇪🇺
@tubetime this thread is making me wish I didn’t get rid of that LC III I picked up years ago and decided I had no sensible reason to hang into. Sometimes it’s ok to not be sensible. 
Tube🌱Time
i'm pleased to announce that my replica Datanetics ASCII keyboard design is now published! check the link for the design files and build instructions.
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Joe's Computer Museum
@tubetime Didja know I create a direct drop-in replacement for the MM5740AAE encoder used in the originals? ;)
Chartreuse
@tubetime Was wondering if you used an original matrix to ascii keyboard converter, but was pleasantly surprised to see it's a 40-pin AVR which really matches the look. Kinda tempted to build one at some point of my S100 video terminal card I have
Tube🌱Time
recommend me a good Android Mastodon client. can it do photos and video?
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the gebiet
@tubetime fedilab on f-droid, you can create another instance's (without a user) timeline too and tusky it's ok if you don't want to install f-droid
Eric Nichols
@tubetime https://tusky.app/ Found this on F-Droid, its open source and seems pretty solid.
Tube🌱Time
in 2016 i made a thing. a very big PCB with 4304 components. A 6502 microprocessor. http://tubetime.us/?p=346
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Paula Maddox
@tubetime It is awesome, and I would love to build one, if you ever decide to share the gerbers and BoM. 
Tube🌱Time
so apparently we're supposed to post cat pictures every saturday on mastodon.
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gigatexal (he/him)
@tubetime the text based terminal nature of the early computing revolution really was the top.
threeforks
@tubetime OMG, too funny! I've always had a bit of an interest in the Canon Cat. I think a good working one is out of my budget. :-)
Jan Atle Ramsli
@tubetime Sure, but only if we post the source |
@tubetime This was just seriously kick-ass.
@tubetime The
"I'm here to correct facts" jacket is a nice touch 🙂
@tubetime So how does the Rotate Left instruction work? Does it also have such extensive circuitry to keep the carry?