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Type: Posts; User: kgober

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  1. Replies
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    Regarding memory management, whether there's a...

    Regarding memory management, whether there's a better way or not depends on the style of editor you're writing. For a line editor, structuring your memory allocations per line makes sense. For a...
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    It appears to be a bug in the 32-bit Windows C...

    It appears to be a bug in the 32-bit Windows C runtime library: https://jeffpar.github.io/kbarchive/kb/107/Q107427/
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    Windows has a special set of messages for alt...

    Windows has a special set of messages for alt keypresses (WM_SYSKEYDOWN and WM_SYSKEYUP). How you detect alt keys in a Windows console application depends on the language being used. If it's a .NET...
  4. It was common in those days for Compaq to include...

    It was common in those days for Compaq to include a small picture as part of a board's silk-screening. I would guess that the picture might relate in some way to the product's code name during...
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    All I saw was "PIC:" the first time I viewed this...

    All I saw was "PIC:" the first time I viewed this thread. For some reason the picture didn't show up. It's displaying for me now, no idea what happened.
  6. 16:10 monitors will allow you to view 16:9...

    16:10 monitors will allow you to view 16:9 content and still have screen space for other things (navigation/edit controls, subtitles, etc.) without having to overlay them on top of the content. You...
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    were you intending to include pictures?

    were you intending to include pictures?
  8. For https web sites, the biggest issue is...

    For https web sites, the biggest issue is certificates, which have specific start and end dates outside of which they are considered invalid. In order for a browser on your computer to be able to...
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    As far as I know, you can set up your own home...

    As far as I know, you can set up your own home ISP simulator using a PBX connected to some modems, with the modems connected to a system (Unix or Linux most likely) providing PPP or SLIP. Used PBX...
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    I'm not 100% sure on #1 but I think the answer is...

    I'm not 100% sure on #1 but I think the answer is yes, it does not have the snow issue.

    For #2 there is a switch setting on the EGA card to indicate that you have a CGA monitor attached (and to...
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    I thought it was unusual. A rack-sized system...

    I thought it was unusual. A rack-sized system isn't usually that deep. I'm used to seeing racks around 3 feet front-to-back, while this one looks more like 5 feet deep. Usually when a system needs...
  12. 11/34a in need of rescue - Coachella Valley, CA

    Saw this on reddit:

    https://www.reddit.com/r/vintagecomputing/comments/bunk5m/pdp1134a_available_for_free_in_the_coachella/
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    M7024 is the VT55 graphing module.

    M7024 is the VT55 graphing module.
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    A quick google search yielded some links (the...

    A quick google search yielded some links (the first includes some maintenance drawings) but no actual schematics:
    ...
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    It's common with very old stuff to be unable to...

    It's common with very old stuff to be unable to get information from the manufacturer's website, or to have to go to a special part of the site for it.

    A quick google search revealed this...
  16. When the PDP-11 was brand new some folks at Bell...

    When the PDP-11 was brand new some folks at Bell Labs bought one under the guise of building a word processing system for typing up patent applications. We know that system today as "Unix". PDP-11...
  17. In a pinch, I've resorted to using black...

    In a pinch, I've resorted to using black electrician's tape for write-protecting 5.25" floppies. I've never had the need to write-enable an 8" floppy that came write-protected from the...
  18. I'm a big believer in using the network to move...

    I'm a big believer in using the network to move files around. But you still need to have some floppies on hand with the NIC drivers and network client, should you ever need to reinstall them or if...
  19. Not especially. Something with a 16-bit CPU,...

    Not especially. Something with a 16-bit CPU, like a 286 or a 386sx. Something old, before SIMMs came to dominate the market. It looks like the board can hold either 1024KB or 640KB depending on...
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    The VT52 emulator has now been updated with...

    The VT52 emulator has now been updated with relevant improvements from VT05, notably more accurate P4 phosphor color, and better connection handling (including better error handling).
    ...
  21. In my experience the UART chips themselves don't...

    In my experience the UART chips themselves don't tend to go bad, it's the line drivers / level converters. If you have any chips on your serial card numbered 1488 or 1489 those would be good...
  22. It's possible that this memory module was...

    It's possible that this memory module was intended for a system that had 4 SIPP sockets (2 banks of 2 sockets each). a SIPP is a lot like a SIMM, except it has pins on the edge.

    Anyway, this...
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    Another new VT05 release...

    Another new VT05 release (two actually, but we may as well just skip to the latest).

    I'm running out of steam so I think I may be done with VT05 updates for a while. The latest changes are mostly...
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    Updates are frequent when a project has my...

    Updates are frequent when a project has my attention. I can't say how long this will last, but I've posted another new release.

    This one has a more accurate reproduction of the terminal beep. ...
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    I get the distinct impression that the WiFi-232...

    I get the distinct impression that the WiFi-232 is for outbound communication. In this situation inbound communication is what's needed, so a device is needed that acts as a server and accepts...
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