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Type: Posts; User: resman

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  1. Replies
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    Great! Pictures...

    Great! Pictures...
  2. Thread: Slow News Day

    by resman
    Replies
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    3,648

    For me, the issue is related to the shorthand...

    For me, the issue is related to the shorthand multiplication operator used. Most of us are used to seeing an algebraic equation like:

    ax + by + c

    where the inner terms are multiple together...
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    Here are the results for a Compaq Deskpro at...

    Here are the results for a Compaq Deskpro at ~7.14 MHz with a NEC V30:

    100: 0.22
    1000: 12.08
    3000: 102.53
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    Try pressing Ctrl Alt > to switch to external...

    Try pressing Ctrl Alt > to switch to external monitor: https://en.wikipedia.org/wiki/Compaq_Portable
  5. The first day of work at Compaq ( 1988 ) I...

    The first day of work at Compaq ( 1988 ) I received my development computer and accessories in boxes and the requisite torx toolkit to assemble it all. You were expected to be able to put everything...
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    It's reporting a video failure. Not many options...

    It's reporting a video failure. Not many options to try, but:

    Double check the motherboard DIP switch setting to make sure it matches CGA and Compaq internal monitor.

    Try a different...
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    The memory boards aren't anything like the...

    The memory boards aren't anything like the Portable 386's - if you're a little patient they will show up on eBay (even though the OP doesn't want to look there).

    The 386/20e was still ISA - the...
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    With the unicorn CRT. Well done! The 386/20e is...

    With the unicorn CRT. Well done! The 386/20e is my favorite Compaq (well, right after the original SystemPro). The perfect combination of size and power and I really like the feel of the keyboard....
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    I think there is, but with a NEC V20 upgrade you...

    I think there is, but with a NEC V20 upgrade you can use the Iomega ZIP software.
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    MASM 5.1 works well on 8088/86. I like it because...

    MASM 5.1 works well on 8088/86. I like it because it supports the older feels-like-programming-a-mainframe syntax as well as the simplified model syntax.

    Also, as the OP is coming from higher...
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    The first thing I'd do is put a simple RC circuit...

    The first thing I'd do is put a simple RC circuit in front of that tach module to "debounce" the signal. I think without cleaning up the ringing, your just going to frustrate yourself.
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    One possible option is to pass the command in on...

    One possible option is to pass the command in on the dosbox command line via '-c'. For instance:



    dosbox -c "dir /w" -c exit


    No need to change any configuration files except to maybe mount...
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    So I dragged out my 64 bit linux laptop and...

    So I dragged out my 64 bit linux laptop and installed DOSEMU. No dice running WATCOM tools. I then decided to try running under Wine and it came back with "unable to allocate DOS memory. Install...
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    Did you try: echo 1 > /proc/sys/abi/ldt16 ...

    Did you try:


    echo 1 > /proc/sys/abi/ldt16

    That tip should probably be part of the dosemu documentation.


    from the bug report?
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    I don't use DOSEMU (yet, looks interesting), but...

    I don't use DOSEMU (yet, looks interesting), but do you know what version you are using? I found this linked from WikiPedia: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=751632
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    Thanks for all that! Do you have the manual for...

    Thanks for all that! Do you have the manual for the Compaq EGA (and where were you three months ago ;-) )?
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    It's a Compaq PCB and BIOS using a C&T chipset....

    It's a Compaq PCB and BIOS using a C&T chipset. What makes it so unique is the internal header for connecting to the Portable's CRT and the timings to work with its dual frequency operation.
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    As a last follow-up, I decided to treat the...

    As a last follow-up, I decided to treat the switches on the back of the card just like the IBM EGA, which is well documented. Of course Compaq was very diligent in replicating IBMs feature set, so it...
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    At the risk of wearing everyone out with my...

    At the risk of wearing everyone out with my updates, I've been busy adding programs and demos of graphics routines I wrote from the late '80s and early '90s. They've been updated to use this GFX...
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    I'll just leave this here for your perusal:...

    I'll just leave this here for your perusal: https://github.com/dschmenk/Bresen-Span/tree/master/src/gfxlib

    52812 52813
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    Thanks to Trixster and Krille for their valuable...

    Thanks to Trixster and Krille for their valuable insights. I also added a quick and dirty, if not somewhat clever, bitblt routine that also enabled a text output routine. Updates on GitHub. *Now* I...
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    Ah, I just re-read your post (hopefully with...

    Ah, I just re-read your post (hopefully with comprehension this time). So, yes, I see what you are saying. In the case of rendering to the front buffer, it would just need to copy that back to the...
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    Thanks Krille! The nuances of 8086 assembly are...

    Thanks Krille! The nuances of 8086 assembly are slowly returning. Your pointers are greatly appreciated.
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    Indeed, but that is a lot of memory copying for...

    Indeed, but that is a lot of memory copying for relatively little benefit. Easier to just be aware of the "feature".
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    This ought to be the last update for a while. I...

    This ought to be the last update for a while. I went ahead and implemented page flipping in the GFX library for all devices, then broke out the library into a separate directory on GitHub:...
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