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Type: Posts; User: VileR

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  1. Replies
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    Personally I'd be wary of doing either of...

    Personally I'd be wary of doing either of those... if the internal CRT expects a 325-line signal, the 400-line BIOS (or even a mono-emulating VGA Wonder) may not play nice with it. Those monochrome...
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    892

    According to BYTE, the first Corona PPC model(s)...

    According to BYTE, the first Corona PPC model(s) didn't do CGA emulation. See https://archive.org/details/byte-magazine-1983-09/page/n235/mode/2up - says under 'Graphics' that you'd need to install...
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    892

    Okay, definitely no need to mess with the tube...

    Okay, definitely no need to mess with the tube then. Those things are pretty much irreplaceable these days, as two different shipments have recently taught me (the hard way), so I wouldn't ask anyone...
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    892

    Here are his photos. The character set is...

    Here are his photos. The character set is actually on two 4kB MBM2732A EPROMs (data is interleaved).

    They are the bottom two here: https://int10h.org/dump/PPC400_char_roms.jpg
    Location on the...
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    Yeah, please don't try any surgery if you deem it...

    Yeah, please don't try any surgery if you deem it risky... I'll try to check with the guy who provided the dump from the PPC400, hopefully the innards are similar enough.

    There's actually a much...
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    Oh, nice - hope that works out! (and if it...

    Oh, nice - hope that works out! (and if it doesn't, the BIOS dump in the link you've found might conceivably have more clues about how the machine expects the keyboard to communicate.)


    Those...
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    GW-BASIC source code released

    https://devblogs.microsoft.com/commandline/microsoft-open-sources-gw-basic/

    https://github.com/microsoft/GW-BASIC

    Now, I'm hoping that they'd go one further and release the sources for BASCOM...
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    Nice! Well, if you're willing to dump the...

    Nice!
    Well, if you're willing to dump the contents of the character generator ROM (and have a way to do it), that'd be awesome. :)

    It's a pity about that nonstandard keyboard connector......
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    The logo as well - make that yellow 'corona' just...

    The logo as well - make that yellow 'corona' just a little more spiky...

    It's not easy to tell from the photos, but I'm wondering about the text display: does it use a 16x16-dot font like the...
  10. Nice, glad it helps. Note that you can even use...

    Nice, glad it helps. Note that you can even use this with booters, although that should rarely be needed (use MAKEBOOT with a blank diskette - it'll boot up and apply the fix, then you can insert...
  11. In addition, there's also that bug (feature?) in...

    In addition, there's also that bug (feature?) in the CGA design, where the double pixel clock rate (in 80-column mode) also halves the duration of the hsync pulse. This makes many displays "miss"...
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    Does the fact that there's always a zero value at...

    Does the fact that there's always a zero value at the top of the stack also stem from CP/M? If so, I guess sizecoders these days have yet another reason to thank Gary Kildall. :)
  13. Thread: Ibm 5153 crt

    by VileR
    Replies
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    270

    I can sympathize- I'm the proud owner of two...

    I can sympathize- I'm the proud owner of two different 5153s with busted tubes, so if anyone figures out a suitable replacement model or P/N, I'd like to know as well.

    If and when I finally work...
  14. Leading Edge Model D is more or less done, too. ...

    Leading Edge Model D is more or less done, too. (Monochrome anyway- the source for the 8x8 color charset wasn't 100%, so a better one might be nice.)

    Thanks guys, keep 'em coming!
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    You didn't specify which version of MASM you're...

    You didn't specify which version of MASM you're using, but I don't think the versions that were any good actually run on DOS 1.10. The earlier ones are known for the rich biodiversity of their bugs....
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    Wouldn't EGA be using 6-bit RGB, rather than an...

    Wouldn't EGA be using 6-bit RGB, rather than an intensity bit? All the other intense colors look the same as their darker counterparts, so I'd say it's both of the green bits that are getting from...
  17. Well, the Olivetti M316 is accounted for - thanks...

    Well, the Olivetti M316 is accounted for - thanks go to the helpful contributor. :) Data from the others is still welcome.

    Since I cannot edit the first post, I should note that some other Sanyo...
  18. For owners of these Leading Edge / Olivetti / Sanyo / Amstrad models

    If you have one of these (in working order):

    - Leading Edge Model D (with a color and/or mono monitor)
    - Olivetti M15 / M15-Plus
    - Olivetti M211v / M316
    - Sanyo MBC-775
    - Sanyo MBC-16
    -...
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    A Sperry PC owner sent me this photo of the...

    A Sperry PC owner sent me this photo of the original CGA board that came with it (click for the full pic):

    https://i.ibb.co/87L1CXW/Sperry-CGA.jpg

    We're wondering if this might actually be the...
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    Intriguing - gotta wonder if that was their...

    Intriguing - gotta wonder if that was their secret sauce for achieving those extra colors. Temporal dithering like today's el-cheapo flat panels, but without the visible flicker due to the long...
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    and If anyone gets around to doing this, I...

    and If anyone gets around to doing this, I wouldn't mind seeing dumps of the video character-generator ROM either, for my oldschool PC font pack. :)

    Though I'm mostly interested in knowing more...
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    A software BIOS/mode setting program may be...

    A software BIOS/mode setting program may be required. In case you don't have them: https://www.vogons.org/viewtopic.php?f=63&t=68088&p=770713
  23. I may be missing the point of your question, but...

    I may be missing the point of your question, but all CGA and EGA cards were 8-bit ISA, at least as far as I'm aware (even on machines with the 16-bit AT bus). It wasn't until VGA came along that...
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    Isn't there some way to configure EDIT/tell it...

    Isn't there some way to configure EDIT/tell it that you're using a mono card, perhaps during installation? I know that's the case with DOSSHELL at least, so it may apply here too.
  25. Looking good! Happy to see that the 5154...

    Looking good! Happy to see that the 5154 survived shipment... how was it packed and boxed? After my recent thoroughly-deceased arrival, I gotta know.
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