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  1. Why in the world does this forum not allow...

    Why in the world does this forum not allow editing of my own posts beyond a few minutes? So very annoying. I don't like not being able to correct errors.
  2. Screen shots attached. 61567

    Screen shots attached.

    61567
  3. I did a little more poking on this. ...

    I did a little more poking on this. Interestingly enough the VGA feature connector on this card has a jumper wire soldered to pin Z13, which should be unused/key so perhaps this is a slightly...
  4. Eudimorphodon, this is exactly the sort of...

    Eudimorphodon, this is exactly the sort of technical and information rich reply I was hoping to receive. It gives me a good bit of information to start with and various leads to follow. Thank you.
  5. VGA card with decent palette grayscaling for Gas-Plasma panel?

    I have a gas-plasma panel being driven off the VESA feature connector of an Orchid Fahrenheit 1280 (1mb ISA card). The panel itself is capable of 16 shades but I am unhappy with the palette...
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    I found a connector and will make a cable but am...

    I found a connector and will make a cable but am still on the lookout for originals if anyone has something. Same for the keyboard cable.
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    Grid Palmpad cables

    Does anyone have a spare palmpad power/serial cable they can part with. I really don't care to 'get creative' with this one. Thanks.
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    Was there a GRiD MS-DOS 3.31?

    Lately I've been having a great time messing with ROMs for the GridCase 1500 series. The customized io.sys in 'GRiD MS-DOS 3.3' implements some pretty slick ROM integration features. The MS-DOS 3.3...
  9. GRiD V.32bis 14400 Bps Modem Specifications ...

    GRiD V.32bis 14400 Bps Modem Specifications

    Communication Modes
    Asynchronous, Autosync, Group III FAX
    Communication Rates and Communication Standards Supported

    Data
    300 bps Bell 103
    300 bps...
  10. Is the 1755 a regular consumer grade laptop...

    Is the 1755 a regular consumer grade laptop branded as GRiD? My notes (probably from online reading, so take it for what that's worth) indicate the following machines listed below may be the same...
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    Hey Kylball, taking a closer look at your photos...

    Hey Kylball, taking a closer look at your photos I've not seen that particular ATA backplane. Would it be possible to see a picture of the front and back of it?
  12. There is a lot of info out there but it does seem...

    There is a lot of info out there but it does seem like some of it, such as certain schematics and software, have vaporized with time. I haven't encountered any major mysteries, what information do...
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    I yanked the two EPROM's and dumped them with my...

    I yanked the two EPROM's and dumped them with my programmer but I have found software dumps usually work just fine too on 286 and 386 machines so you might use Navratil to dump the BIOS the easy way....
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    Also, you should have to change the computer's...

    Also, you should have to change the computer's internal DC-DC power supply too. 15XX models fitted with plasma screens have a PSU that outputs 33VDC for the display. LCD equipped models output...
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    Qbus, that looks really nice.

    Qbus, that looks really nice.
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    Grid 1450sx power issues

    I've been tinkering with a dead Grid 1450sx for a while now. I recapped the power supply and am now getting my 5v, +12, -12, etc. but the computer still refuses to come to life. There are a few...
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    The complexity depends on if you're swapping out...

    The complexity depends on if you're swapping out the entire lid or just the display panel within. The Gas Plasma lids have physically different brightness adjustment than the other display types,...
  18. After sleeping on it I concluded that...

    After sleeping on it I concluded that uninitialized bytes of the new CMOS chip might be 0xFF (default new values, like a blank EPROM). I dumped the CMOS values to confirm was the case. I then...
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    Yep, same deal. I would be interested to find a...

    Yep, same deal. I would be interested to find a newer version of the BIOS. When I examined CONF1520.EXE one thing that it does is get the BIOS date and sets a flag if it's older than 10/24/89 (Mine...
  20. Gridcase 1520 hardware password after RTC clock replacement

    Interesting thing happened today. I finally bought a brand new Dallas RTC and installed it in my GridCase 1520. Everything went fine until I went to power it on... Time/Date not set, Press F1,...
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    Good job, it isn't easy! I modded my 1520 for a...

    Good job, it isn't easy! I modded my 1520 for a CF card awhile back and it took me several days to nuke the fingerprinting and brute force the HDD type and desired geometry. I'm now revisiting it...
  22. I read somewhere that in PC's the Drive Ready...

    I read somewhere that in PC's the Drive Ready signal often isn't used and should be tied low... unless you have a machine that actually uses that signal. I tried to quickly verify this information...
  23. I only skimmed this thread so I apologize if this...

    I only skimmed this thread so I apologize if this has been touched on...

    If I were you I would replace the Dallas RTC/CMOS chip and see what happens. You may already know that this is the...
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    From searching that model I guess it might be a...

    From searching that model I guess it might be a Phoenix BIOS which I presume has a checksum feature. Personally without a known good BIOS to compare against I would calculate the checksum, then...
  25. Oh, that's all? I'll get started on that then. ...

    Oh, that's all? I'll get started on that then. :cool:
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