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  1. Replies
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    I guess you missed my point.. I can do a direct...

    I guess you missed my point.. I can do a direct comparison of z80 vs 8085 in the same hardware. Seems like a good fir for your stated goal.
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    did you try the "cold boot process"? hold down...

    did you try the "cold boot process"?

    hold down CNTL-BREAK, power off, keep holding those keys down, and power up, release.

    (alternative is CNTL-BREAK - hold - hit reset - release)

    or the...
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    just to make this more interesting, I now have...

    just to make this more interesting,
    I now have an M100 with a Z80 installed, same clock rate.
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    My interest is personal. Just because. I have...

    My interest is personal. Just because. I have been able to increase from 2.5 MHz to 6MHz so far and continuing to explore.

    I have developed a process..
    1) a good frequency synthesizer capable...
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    testing and verifying overclocking

    I am working on validating some overclocking modes for the TRS-80 Model 100.

    To date, I have just been letting the system run at predefined clock rates, with pretty large jumps. I can tell when...
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    Kaypro on Shopgoodwill

    https://www.shopgoodwill.com/Item/106569030
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    Good question indeed. The DVI attachment would...

    Good question indeed. The DVI attachment would be really a natural for a CP/M implementation.
    The DVI video portion certainly acts like a terminal. And the disk acts like a normal floppy...
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    update on my TRS-80 Model 100 CP/M rig

    It has been some effort, but I am really enjoying the outcome.
    I have what I would call a pretty unique CP/M system here.

    Starting with a stock TRS-80 Model 100, I have....

    * firstly developed...
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    4 vintage PCs

    https://www.kijiji.ca/v-other/edmonton/lot-of-4-very-old-industrial-computers-vintage-very-heavy/1529348794?utm_source=com.sec.android.app.sbrowser&utm_medium=social&utm_campaign=socialbuttons&utm_con...
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    good point. I guess that XCEL may have OEMm'd a...

    good point. I guess that XCEL may have OEMm'd a version of the Morrow Pivot for their own use. It certainly does not say Osborne 3 anywhere.

    The add seems to imply that the entire computer is...
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    Think I found it... thought I may have seen it...

    Think I found it... thought I may have seen it before.
    63960
  12. Replies
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    here are the pics from the auction the case is...

    here are the pics from the auction
    the case is hugely expanded, looks like aluminum, with a big fan, and some slots for ISA cards I guess.

    63948

    63949

    63950

    63951
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    Osborne 3- with a serious add-on!

    https://www.ebay.ca/itm/UNIQUE-Vintage-Military-computer-Osborne-3-powers-on-and-displays/254560443734?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

    check this out! wonder what that...
  14. thats what I was thinking; there were models that...

    thats what I was thinking; there were models that had an optional HDD, so there must be an interface in there to hook into.
    Maybe I'll grab it!
  15. Zenith SupersPort ZFL-184-01 : convert to XT-CF?

    Local seller is offering a ZFL-184-01. I think this is a dual floppy 80C88 machine... confirming.

    Does anyone understand if a dual-floppy version can be modified to be 1 floppy + XT-CF?

    thanks...
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    Zenith Z-171- replacement LCD

    I would be interested in getting a better LCD than is currently in my Z-171.
    If someone has a parts machine that has a good LCD you are willing to part with, let me know. Thanks
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    For any epoxy job I would recommend WEST epoxy...

    For any epoxy job I would recommend WEST epoxy and fillers. Cant go wrong.
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    thanks for the feedback. to buy a machine that...

    thanks for the feedback. to buy a machine that can't be shown to power up at all (in this case no PSU) and then to assume it can be fixed reasonably easily, .. is a stretch. Too much for me. I...
  19. Regarding UTsource, I agree..Test to confirm ok,...

    Regarding UTsource, I agree..Test to confirm ok, and complain when parts are defective. UTsource did a partial refund in my case.
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    Ah! I see. Thanks Chuck. Kinda obvious now ;). ...

    Ah! I see. Thanks Chuck. Kinda obvious now ;). Signed 16 bit divide by two.

    Cheers. Steve
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    "You've got a couple of things wrong, however....

    "You've got a couple of things wrong, however. The 10H instruction is an arithmetic (i.e. sign extended) right shift of HL, not a rotate. Very useful."

    Hi Chuck, I've used a lot of the undoc...
  22. I recently got fake SRAMs from UTsource. I've...

    I recently got fake SRAMs from UTsource. I've also gotten low grade defective voltage regulators.

    I did get good NSC800 processors and various other parts.

    Not real sure about them. Never...
  23. Thank you for your note! I'm sure that your...

    Thank you for your note! I'm sure that your contact here will be very useful. I'm in Canada so that's a challenge for me...
  24. Thanks for the tips!

    Thanks for the tips!
  25. Thread: Tape drive

    by Twospruces
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    Not sure why me or anyone posting a third party...

    Not sure why me or anyone posting a third party ad here is a problem. Please enlighten me. What would you suggest as a better alternative?
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