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  1. Soviet clone of the XT had BIOS listing shipped...

    Soviet clone of the XT had BIOS listing shipped on floppies -- https://github.com/shattered/retro-bios/blob/master/ec1841/ec1841.lst
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    MAME dev team is working on emulating it, recent...

    MAME dev team is working on emulating it, recent 0.211 release has preliminary support.
  3. BTW, SAMdisk and Aufit are quite handy for...

    BTW, SAMdisk and Aufit are quite handy for analysis and conversion from flux dumps to sector images and other formats. Aufit is not open source (yet?), but SAMdisk is.
  4. Post-processing software designed with copy...

    Post-processing software designed with copy protections in mind (example: Aufit) should help here.
  5. Yes, that's right. ОБЩ is short for общий...

    Yes, that's right. ОБЩ is short for общий (common ground).
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    I've experimented a bit more with the code,...

    I've experimented a bit more with the code, inspired by this video:


    https://www.youtube.com/watch?v=8Q1vN51o-Dg

    and changed code generator to produce PDP-11 machine code, it mostly works (but...
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    I've posted...

    I've posted https://github.com/MobyGamer/XDC/pull/1
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    That is a very cool find. Does it use...

    That is a very cool find. Does it use unmodified ROM?
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    It hangs (goes into infinite loop in sfdc...

    It hangs (goes into infinite loop in sfdc function) because dosbox (I tested 0.74) does not emulate the floppy controller, and all reads from its registers return 0xff. Why PUTR still tries to...
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    Sure. I'll rework the changes a bit and wrap...

    Sure. I'll rework the changes a bit and wrap them in $IFDEF, since the hardware is different enough -- video memory on starts at B000:0 and reprogramming timer channel 0 doesn't work (it runs in...
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    I've added another video mode -- HP 95LX 240x128:...

    I've added another video mode -- HP 95LX 240x128:


    https://www.youtube.com/watch?v=1NJcFaxN6HY

    Not tested on a real thing yet, probably will not work because of broken CPU detection in TP7...
  12. It might work if you install hacked SunDisk...

    It might work if you install hacked SunDisk drivers -- http://www.retroisle.com/others/hp95lx/Utilities/sundrv_m.zip
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    And now for something completely different: ...

    And now for something completely different:


    https://www.youtube.com/watch?v=BLCjzHAy9Ec
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    Here's another Lode Runner variant (captured in...

    Here's another Lode Runner variant (captured in MAME):


    https://www.youtube.com/watch?v=mWFyffsBPgA
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    MAME can simulate effects of shadow mask/aperture...

    MAME can simulate effects of shadow mask/aperture grille on a CRT via pixel shaders :)
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    I've used netpbm tools to convert from jpeg, they...

    I've used netpbm tools to convert from jpeg, they do some palette optimization. ImageMagick could do better (PGC palette has only 4 bits per RGB channel)


    % jpegtopnm maru480.jpg | ppmdither |...
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    I've reverse-engineered how accelerated VRAM...

    I've reverse-engineered how accelerated VRAM writes are implemented -- writing to one of addresses in 0x32020--0x3203f range triggers the acceleration of next VRAM write. Next release of MAME will...
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    That would be nice, especially if those manuals...

    That would be nice, especially if those manuals describe ASIC programming in any detail -- manuals on Bitsavers have a parts list but not much else:


    U59 252004-005 ROM OS Lo
    U60 252004-006 ROM...
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    Hopefully the buyer will be willing to dump the...

    Hopefully the buyer will be willing to dump the firmware, software and scan manuals for it... Sounds like an interesting emulation target.
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    ""CAM",88" -- strings in MBR: "Formatted by...

    ""CAM",88" -- strings in MBR: "Formatted by enhanced floppy disc formatter. Copyright (C) "CAM" , L. Liverovsky, 1988."

    "MCS 1993" and "MCS 1994" -- likely FFORMAT...
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    Found a few more: ""CAM",88" "DCP 3.20"...

    Found a few more:

    ""CAM",88"
    "DCP 3.20"
    "IBMMS3.3"
    "MCS 1993"
    "MCS 1994"
    "PU_1700F" -- formatted by PU_1700.COM (http://old-dos.ru/files/file_236.html)
    "SCT 3.30"
    "WINCMD "
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    Tried this in emulated PC (in MAME) -- same...

    Tried this in emulated PC (in MAME) -- same problem. Looks like a bug in the player -- it tries to write to MDA display memory even though CGA is installed.
  23. Nesticle supposedly could :)

    Nesticle supposedly could :)
  24. Nice progress! > (I'd love to know if this...

    Nice progress!

    > (I'd love to know if this computer has any GPIO or at least how to interface with the serial port in code.)

    No GPIO on the board, but it has a printer port (XP1 connector). ...
  25. Pretty bare-bones system -- no diags there. ...

    Pretty bare-bones system -- no diags there. I'll see if pdp-11.ru archive has a MX image of TMOS (test monitor O/S, a clone of DEC XXDP).



    No idea, sorry.



    Right, I made the screenshot...
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