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  1. Best PASCAL for CP/M on an 8080/8085 (not Z80)

    Hi,
    Looking for recommendations for the best PASCAL compiler for CP/M but NOT Z80. Need a solution for 8080/8085.
    The application I am writing will likely require some embedded machine language...
  2. Had to keep pushing. Tried MSDOS 6.22. of...

    Had to keep pushing. Tried MSDOS 6.22. of course, it booted right up.
    Pretty happy with the progress here. While not out of the box compatible, it is certainly looking pretty good.
    In order to...
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    update: A few improvements to my Z-171: ...

    update:

    A few improvements to my Z-171: First, I've added an 8087 successfully, and also I have been able to upgrade to MSDOS 5 now. The latter required additional patches to the BIOS BDA area,...
  4. I believe you are correct. I made 3 changes to...

    I believe you are correct.
    I made 3 changes to the BDA - 40:80, 40:82 and 40:96. I think the first 2 are "don't care" but the last one... bit 4 being set seemed to be the issue.

    The investment...
  5. success is mine.... ;) there is one more byte...

    success is mine.... ;)

    there is one more byte that needs to be initialized. 40:96 , which is a keyboard flag byte. Again using XUB to tweak BDA values, I reset that byte to 00.

    Guess what,...
  6. Yes, msdos 5 boots up to a dos prompt. if I...

    Yes, msdos 5 boots up to a dos prompt. if I include MODE and CTTY COM1 commands in autoexec.bat, then I can control the machine remotely.
    So, imagine letting the machine boot right up, and you are...
  7. update: 1) the BIOS interrupt table appears...

    update:
    1) the BIOS interrupt table appears correct when comparing the boot up with MSDOS 3.3 vs MSDOS 5. the INT 16h address is identical, so any int 16h calls should be serviced by the BIOS...
  8. Great suggestion here --> Got CTTY COM1:...

    Great suggestion here -->



    Got CTTY COM1: working over serial... and yes DOS 5 is running.
    The copy of MSDOS5 that I have seems to require an install - many of the DOS files are in a ZIP...
  9. Excellent suggestions. I will spend some time on...

    Excellent suggestions. I will spend some time on that. It did not don on me that the machine could be hung as opposed to ignoring the keyboard.



    also excellent! great ideas. I'm not sure at...
  10. I am delving into this to understand the root...

    I am delving into this to understand the root cause. Maybe there is no way to address this but I am curious. After all it is running a standard DOS version now. 3.3. So what's different about 5?...
  11. Thanks for the suggestion. I'll look into that.

    Thanks for the suggestion. I'll look into that.
  12. Currently using stock Microsoft MSDOS 3.3. ...

    Currently using stock Microsoft MSDOS 3.3. Zenith variant was buggy. Config.sys is the same as what came in the distro.
  13. Keyboard differences. Msdos 3.3 vs Msdos 5

    Hi, looking for some help to figure out where to start with a problem.

    My sort of XT compatible Zenith Z171 works well with MSDOS 3.3. However when I try to use MSDOS 5 the keyboard stops...
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    Sorry for derailing the thread, folks.

    Sorry for derailing the thread, folks.
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    on my Zenith Z171, attempting to boot DOS 5...

    on my Zenith Z171, attempting to boot DOS 5 renders the keyboard useless except for CNTL ALT DEL.
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    Thats a great point. I did find a bad ram chip...

    Thats a great point. I did find a bad ram chip at some point. I wonder if that was was caused the problem with dos5. Will have to check it out again.
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    Well my Z171 today has 640k of dram. I am almost...

    Well my Z171 today has 640k of dram. I am almost done a conversion to 1MB of SRAM. The purpose is to expand RAM and reduce power on the 5V rail. The latter is important since adding the 8087 has...
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    Regarding dos 5. It seems like there is an...

    Regarding dos 5. It seems like there is an incompatibility. The hardware I have is a Zenith Z171. When I try to install dos 5, it hangs. I could try with a fresh copy of the disks to confirm.
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    ..xt...

    ..xt...
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    Sounds like this solution works with DOS 5. Is...

    Sounds like this solution works with DOS 5. Is there something similar that could work in Dos 3.3? Same situation.. an CT with RAM addressable in the employ spaces above A0000h.
    I'm my particular...
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    Hi, you could try using the "xtl" version of...

    Hi, you could try using the "xtl" version of XUB..that includes the boot menu option I believe.
    I compiled and use a version that does not include the hotkey bar on the top.
  22. hey thanks for this! seems to run well. passed...

    hey thanks for this! seems to run well. passed all tests, and looping for 5 min. nice to have the file here in the forum stored for future reference as well!
  23. awesome, I will try and report back. Thanks very...

    awesome, I will try and report back. Thanks very much!
  24. George that would be awesome. Sounds like you...

    George that would be awesome.
    Sounds like you know how to make MCPDIAG run interations; I didnt see anything that let me do that, but I saw an iteration count.
    Anyhow I would be very interested...
  25. great find thanks! Good to know my use case on...

    great find thanks! Good to know my use case on Z171 isn't necessarily defective. The thought of disassembling MCPDIAG is unappealing. After reading that application note for 8087, it seems like...
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