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Type: Posts; User: glitch

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  1. I use a Samsung SyncMaster 930B for my test...

    I use a Samsung SyncMaster 930B for my test bench, it'll sync on green from SGI and Sun gear. I've heard there's some difference between 13W3 converters, that some work on some machines and not...
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    That's funny, there used to be a seller that...

    That's funny, there used to be a seller that would flag any listing for a PC that included MS-DOS without a license or original set of disks!
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    I've wondered if that's what some of those DOS,...

    I've wondered if that's what some of those DOS, CP/M, Apple II, etc. listings are for...
  4. If the only thing you can do is STOP/RUN and...

    If the only thing you can do is STOP/RUN and RESET/EXT CLEAR with a board in, it's almost always an issue of pins 70/20 being grounded on the board. Grounding pin 20 disables all of the one-shot...
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    I've gotten shrinkwrapped stuff that still had...

    I've gotten shrinkwrapped stuff that still had 80s or 90s computer store price stickers on the wrap that wasn't readable, one kind of hopes it would be but you can't very well get mad over something...
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    Awesome! I'll see if I can stop in next week, I...

    Awesome! I'll see if I can stop in next week, I should be in your area for work.
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    Nice Myst poster!

    Nice Myst poster!
  8. Thread: Fake ICs

    by glitch
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    * Companies in China (or wherever) get paid to...

    * Companies in China (or wherever) get paid to take the western world's eWaste
    * Gov't in whatever country pays them to not just set it on fire or put it in a hole or river
    * Gov't in whatever...
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    Nice! Good to see an open version of this, I...

    Nice! Good to see an open version of this, I believe someone else has made a rather expensive closed-source version.
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    Great to see folks still running BBSes, and other...

    Great to see folks still running BBSes, and other folks actually still using them!
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    Yep, either wire wrap or 66/110 block...

    Yep, either wire wrap or 66/110 block termination. I've got a few sections of stranded, I believe it was originally for station cables on key system phones (where a 25-pair goes from the telephone to...
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    Whatever you do, don't buy those cheap breadboard...

    Whatever you do, don't buy those cheap breadboard jumpers with "Dupont" male connectors (they're invariably knockoffs) on the end. I currently have an Altair on the bench that was re-wired with...
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    William Colley III's A85 is the closest I've...

    William Colley III's A85 is the closest I've found, Herb has a version with modifications to get it building under modern C compilers:

    http://www.retrotechnology.com/restore/a85.html

    I'm...
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    Reducing voltage on a linear supply *can* result...

    Reducing voltage on a linear supply *can* result in reduced heat from regulators and diodes. Sometimes I turn the line voltage down a little if I'm working with my IMSAI, have very few boards...
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    Excellent news, looking forward to it!

    Excellent news, looking forward to it!
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    Reducing line voltage isn't likely to make a...

    Reducing line voltage isn't likely to make a difference, especially on a PDP-11/03. If something fails at our slightly higher modern levels, it was on the way out anyhow!
  17. So, does the image end up being just a raw...

    So, does the image end up being just a raw filesystem-in-a-file, like when you make a floppy image with dd? If so, can even the larger ones be mounted under Linux?
  18. Cool project, especially nice that it can handle...

    Cool project, especially nice that it can handle much larger floppy images! And, being layer 2, you're not likely to be exposing your machine to any sort of Internet-exploitable vulnerabilities if...
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    I've got a spare Data I/O 29A with UniPak, if...

    I've got a spare Data I/O 29A with UniPak, if that will do the devices you need. Beware, even before shipping, these aren't cheap -- you probably know that if you're looking at Data I/O though.

    If...
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    Update: dead drive may not be dead, I may have...

    Update: dead drive may not be dead, I may have accidentally replaced three bipolar electrolytic caps with polarized ones, waiting on some parts to come in.
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    z80pack is pretty good: ...

    z80pack is pretty good:

    https://www.autometer.de/unix4fun/z80pack/

    MYZ80 (DOS CP/M compat program) works well under DOSbox (and also real DOS):

    http://www.z80.eu/myz80cpm.html
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    It probably trickle charges the old SLA, which...

    It probably trickle charges the old SLA, which the NiMH cells probably won't like. Most of the better NiMH "trickle charge" circuits are really "maintenance charge" circuits and send pulses of charge...
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    You can't go wrong with Eneloop, but you probably...

    You can't go wrong with Eneloop, but you probably don't want to use the old SLA trickle charge circuit on them.
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    Oh, and don't forget that forced air cooling is...

    Oh, and don't forget that forced air cooling is mandatory! Just a few minutes here and there for testing without cooling would be OK, but if you're going to run it for, say, more than 5 minutes, you...
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    I think you need separate boot ROMs for the...

    I think you need separate boot ROMs for the RQDX3, or you'd have to type in a boot loader every time, I don't think it has them on board. Some third party cards do have boot ROMs built in, like the...
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