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Type: Posts; User: twistedpneumatic

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    Well now the formatted drive from XUB2 cannot be...

    Well now the formatted drive from XUB2 cannot be read by Windows XP. How can I get XUB1.1.5 back on there :/
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    XT-IDE Rev2 floppy booting issue

    I upgraded my card to XT-IDE to XUB2 beta3 and selected HI-SPEED mode. It will boot fine with no card, it will boot fine in compatibility mode, it will boot fine with a freshly wiped CF card, but the...
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    I'm starting to be suspicious that its the CF...

    I'm starting to be suspicious that its the CF adapter. I tested it in glitch's XT and it came back okay so I think it may be fine.
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    Reflowing solder did not help.

    Reflowing solder did not help.
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    XT-IDE keyboard issues

    I tried formatting my CF-card and it worked, the drive is visible, can be copied to, etc. The only issue is it keeps beeping, and once its done with its task it shows it was typing garbage...
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    Also what should I set for the DMA channel?

    Also what should I set for the DMA channel?
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    Lol I have no interest the modem functionality,...

    Lol I have no interest the modem functionality, there's a jumper to flip it off. CD-ROM is a much smaller(proprietary?) port in the upper right of the card. I can take a look at the chip under the...
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    16-bit generic sound card in XT?

    Hi guys,

    I want to run 8088 domination on my IBM 5155. Can I use this generic looking sound card in it. Seems that it only needs 16 for the CD-ROM drive, and there aren't a lot of connections to...
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    False alarm....I just accidentally pushed switch...

    False alarm....I just accidentally pushed switch 5 so it was looking for an MDA card. Flipped 3/4 back again and its posting 256K.
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    Changed the dipswitches to 3/4 to off. Now it...

    Changed the dipswitches to 3/4 to off. Now it wont boot :( . Changed them back to no avail.
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    IBM 5155 64kb detected.

    Hi guys,

    My 5155 only counts up to 64KB. I just swapped RAM from bank 1 and bank 3. Still no change. Granted both banks could have a faulty chip...but where do I go that isn't buying 36 ICs?
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    Okay, I will make a reset switch for it. Do I...

    Okay, I will make a reset switch for it. Do I need anything more than two header wires and a button? Capacitor/Pulldown resistor?
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    I can definitely do a resistance check. The...

    I can definitely do a resistance check. The results are sporadic when I seat and reseat the ROM chip. For the V-height of the image, I didnt show a picture of that but I did readjust it. I think the...
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    Based on that pattern, I can see that the high...

    Based on that pattern, I can see that the high part of the address is not working. The characters are all the B0-BF chars. Would that be the even RAM chip complete failure? I have new 2114's here.
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    Well I tried the Char ROM chip...it showed a...

    Well I tried the Char ROM chip...it showed a mostly same pattern though a few definitions were different. I put in the original and some lines were missing. Did it again and it was kinda flickery.
    ...
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    PETTEST2.BIN shows these two screens. Not sure...

    PETTEST2.BIN shows these two screens. Not sure what it means but something is working :D .

    6008960090

    Is this bad V-RAM?
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    Replaced ud2----we have video!!

    Replaced ud2----we have video!!
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    two broken pins on UD2. Pins 10/11 are open.

    two broken pins on UD2. Pins 10/11 are open.
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    Pin 12, UD3...source of clock 1 is good. No...

    Pin 12, UD3...source of clock 1 is good.

    No continuity between Pin 12 of UD3 or any of the other ICs connected to it.
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    Pin 7(Clock) is dead on shift reg. Starts at...

    Pin 7(Clock) is dead on shift reg.
    Starts at 1.7V, then falls to 0 once the CRTC init.

    Pin 15(serial load) shows pulsing both before and after CRTC init.

    I checked the data inputs before and...
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    Arduino was polling a signal until the CRTC...

    Arduino was polling a signal until the CRTC started, at which point it stopped finding any pulses. I know VSYNC was at 15 something KHz before the CRTC started when it dropped to 60Hz.

    The inputs...
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    The brightness was at its max, yes, but it didn't...

    The brightness was at its max, yes, but it didn't seem too high. Just about as bright as other tubes turned all the way up. It was just to see if I could see a raster from it being up but nope. Video...
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    I did check and even after it flashes and "dies",...

    I did check and even after it flashes and "dies", there is still an HYOKE and VYOKE present, so it's scanning alright, even if there is nothing displaying.

    Wait ... Why wouldn't it being stuck at...
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    3.45V steady on load. Doesn't change when the...

    3.45V steady on load. Doesn't change when the CRTC initalizes.

    Datasheet for 74166 shows that its high unless it loads...this should be normal? I'm starting to wonder if the shift register is...
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    Arduino as a Freq. Counter, HSYNC is 20kHz, VSYNC...

    Arduino as a Freq. Counter, HSYNC is 20kHz, VSYNC is 60Hz
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