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Type: Posts; User: D.A.T (Alex)

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    WTB: Sharp MZ-80B FI/O card

    I am searcing for a MZ80B FI/O floppy controller card

    https://www.nightfallcrew.com/wp-content/gallery/sharp-mz-80b/IMG_7361.jpg
    photo: (C) xAD / nIGHTFALL

    If there is one available please...
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    Trixter, SUCCESS!! my friend. Last weekend...

    Trixter,

    SUCCESS!! my friend.

    Last weekend I checked with the above schematic 7407 and 74ls04.
    I noticed that 7407 (buffer) was not functioning properly so I desoldered it and checked.
    53221...
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    Well Trixter. last night on the lab was really...

    Well Trixter. last night on the lab was really progressive!

    According to you mentioning the dip switches checking the dipswitches itself -seems to working ok- BUT when I run the test from this...
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    Yes. 640k Led (loading) stays on for...

    Yes. 640k


    Led (loading) stays on for ever.Yes it does boot on another system


    I will give it a try

    I saw the video of the test you did -- I have a new theory: Your system might be...
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    Thank yoy for taking this to my attention ...

    Thank yoy for taking this to my attention


    Unfortunately it does not run under DOS2.1 (DOS 3.1 gives boot error on my MBC775 -maybe due to BIOS version)


    Checkit does not run maybe due to...
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    this evening on the lab: hooked up the...

    this evening on the lab:

    hooked up the internal MBC-775 CGA color monitor and did some test using ms-dos 2.11 debug (2.11 is the max dos MBC supports!)
    In order (of typing) as they appear on...
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    Well , CGA Compatibility Tester it gives me...

    Well ,

    CGA Compatibility Tester it gives me "Runtime error 215 at 14BA:0a55"
    According to readme it runs on dos 3.1 . MBC-775 runs 2.1 dos only (I didn't manage to run newer DOS then this)
    ...
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    *UPDATE* Hi Trixter! I tried on the pc XT...

    *UPDATE*

    Hi Trixter!

    I tried on the pc XT emulator with mbc-775.td0 image from here.
    using debug I issued the following commands as you can see:

    53033 53034

    As you can notice i write...
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    Hi Trixter and really thank you deeply helping me...

    Hi Trixter and really thank you deeply helping me to revive my MB-775!
    I am very intersted in maiking this machine fully working and I was really dissapointed as the machine was previously working...
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    some thoughts I have: According to what I see...

    some thoughts I have:

    According to what I see I believe that 6845 (cga chip) maybe cannot proccess hires mode properly- as Trixter also pointed out

    What I mean is although the command to turn...
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    @Anonymous Freak Hi my friend Any luck with...

    @Anonymous Freak

    Hi my friend
    Any luck with your MBC-775 Have you managed to boot it?

    I also repaired my recently aquirred mbc-775 and noticed that floppies had some times difficulties...
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    Still trying to find a solution for 3 months now...

    Still trying to find a solution for 3 months now without a positive result!!

    In the weekend I finally burnt an XT diagnostic eprom according to VCF excellent Ruud's post

    The result I got is in...
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    Two things - I don't think the memory add on card...

    Two things - I don't think the memory add on card is original although I have the same one. Get rid of that battery if i't the original.
    >>Ι know this and I have already replaced with a fresh...
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    @lanmanager Really thank you for your infos my...

    @lanmanager

    Really thank you for your infos my friend.
    As there are NO documents ib the nets your info is very usefull.
    I checked and verified the correct posiotion of the DIP switches.

    51318...
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    A little udate: I installed used an 8bit cga...

    A little udate:

    I installed used an 8bit cga card in one of the 2 spare isa slot . The problem is the same. I get the same corrupted image with external card ,too!

    My system has also an add-on...
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    Hello to all oute there and Merry Christmass! ...

    Hello to all oute there and Merry Christmass!

    As I said in my first post . This is an MB-775 with onboard (kind of) CGA .

    I had run this demo before and run properly.All of a sudden weird...
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    Sanyo mbc-775 corrupted graphics (CGA)

    Here it is a long story trying to describe it in a few words:

    About 6 months ago I got a non-working Sanyo mbc-775 luggable pc clone xt!

    After a lot of (hard ) work finally it became alive.
    ...
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    I would also apriciate if a 775 owner could...

    I would also apriciate if a 775 owner could measure psu output pinout voltage.
    46821
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    Sanyo mbc-775 PSU repair problem

    Hi guys!

    As there are not enough infos on the net regarding the mbc-775 I would like to ask for your help/infos:
    I have recently been an owner of a Sanyo mbc-775 .

    46811

    It does not get any...
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