Re: Help! Trying to connect LED frequency display to new AT Power Supply

Posted on 2021-01-02, 16:43

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes it should be a 5 volt line, you should open the dead PSU to be sure. Thank you! Yes, that LED frequency cable hooked directly into the old PSU at a +5V terminal, same place as a bunch of other red cables (picture attached). So is it as simple as splicing together one of the red / black unused …

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Help! Trying to connect LED frequency display to new AT Power Supply

Posted on 2021-01-02, 15:22

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi! Need expert help. I’m trying to connect the LED frequency display on my retro AT case to a new AT PSU. The old PSU is fried and had a direct red/black cable going to the frequency display LED, which is now cut so I could remove the fried PSU. The new AT PSU does not have a dedicated wire like …

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Re: Need help from the experts! Turbo button causing AMIBIOS 10 beep post code (CMOS shutdown register read/write error)

Posted on 2020-10-14, 21:07

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by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, Thanks for your thoughts. I dug up the motherboard manual and it actually says that some VLB expansion cards won’t run with turbo OFF during boot up because of a reduced FSB speed. The manual recommends always booting up with turbo ON and then turning it off if desired once up and running. My …

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Need help from the experts! Turbo button causing AMIBIOS 10 beep post code (CMOS shutdown register read/write error)??

Posted on 2020-10-12, 17:41

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, Was hoping for a little help debugging this. Every time I push the turbo button to “OFF” and cold reset my retro 486 machine, I get a blank screen at boot with a 10 beep post code error (AMIBIOS). This is listed as the “CMOS shutdown register read/write error.” If I hit the turbo button again to …

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Re: CDROM not recognized in DOS after a SOFT reset but works fine after a HARD POWER OFF reset. Any ideas?

Posted on 2020-08-03, 13:24

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by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Awesome ideas guys. I would just operate it as master / slave but the IDE ribbon cord won’t reach so I really wanted to use the CDROM on the secondary controller. I did get it to work! I tried every idea you guys listed and what finally did it was loading the DTC controller card driver and setting …

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Re: CDROM not recognized in DOS after a SOFT reset but works fine after a HARD POWER OFF reset. Any ideas?

Posted on 2020-08-02, 18:59

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Pentiumspeed — thank you so much for your help. The plot thickens — everything works fine if the CDROM is on the primary IDE controller as SLAVE. I can push the reset button and it loads fine on DOS. If it is on the secondary IDE controller as a master, it will NOT work after a RESET button reset. I …

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Re: CDROM not recognized in DOS after a SOFT reset but works fine after a HARD POWER OFF reset. Any ideas?

Posted on 2020-08-02, 11:55

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

IDE/PATA, ATA has reset line as well. This means it is not asserted properly. Cable, controller card please try them. Cheers, Hi, CD-ROM is NEC Multspin 6V CDR-1350A EIDE Controller card is DTC 2278D IDE I have it connected to the second IDE controller on the card using a 40-pin (80 wire) cable. …

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CDROM not recognized in DOS after a SOFT reset but works fine after a HARD POWER OFF reset. Any ideas?

Posted on 2020-08-01, 15:53

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, Building my 486 retro PC. My NEC multisync 6V CDROM works fine after a COLD HARD POWER OFF reset and is recognized in DOS . However, after a soft reset (CTRL-ALT-DEL or reset button), the dos driver gives the error: CD-ROM drive not ready. A(Abort) or R(Retry) Will work fine if I hard power off …

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Re: Setting up ROLAND MPU-401 and MT-32 - PLEASE HELP!

Posted on 2020-08-01, 01:51

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Update: Space Quest 3 works fine. The DOS midi players have no sound output. Strange!

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Re: Setting up ROLAND MPU-401 and MT-32 - PLEASE HELP!

Posted on 2020-07-31, 23:26

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello all! You guys have been awesome so far. I need help setting up my Roland MPU-401 and MT-32. I’m using a Low-Tech MIF IPC RevB interface card to connect to my retro 486 DOS PC. I’m trying to test the hardware to make sure everything works. The MT-32 passes its “test mode” but when I hook the …

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Setting up ROLAND MPU-401 and MT-32 - PLEASE HELP!

Posted on 2020-07-31, 22:52

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello all! You guys have been awesome so far. I need help setting up my Roland MPU-401 and MT-32. I’m using a Low-Tech MIF IPC RevB interface card to connect to my retro 486 DOS PC. I’m trying to test the hardware to make sure everything works. The MT-32 passes its “test mode” but when I hook up the …

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Re: Need HELP with 486 DX2 cooling - what to buy?

Posted on 2020-07-20, 19:45

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Done! Thank you!!!!!!

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Need HELP with 486 DX2 cooling - what to buy?

Posted on 2020-07-20, 17:43

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, You guys have saved me before and I need some more help. Fairly new at this but I’m building a 486DX266 DOS machine. I need to get some sort of cooling for the CPU. I will be replacing the Cyrix with an Intel. This may seem like a really basic question but could someone direct me as to what …

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Re: Motherboard mounting - PLEASE HELP!

Posted on 2020-07-18, 20:43

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, Thanks for the response. Here are pictures of the case and the motherboard. There are no holes on the entire other side of the board with the metal rings, only on that one side. Thank you!

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Motherboard mounting - PLEASE HELP!

Posted on 2020-07-18, 20:23

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I’m trying to mount my motherboard to my case. I’ve noticed that two of the mounting holes on the motherboard do NOT have a metal ring around them like the others do (see pictures). These holes are needed to mount it securely and line up perfectly with the case. Can I screw a metal MB screw in …

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Will these power supplies work?

Posted on 2020-07-16, 23:59

by

by brettp11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, Building a DOS retro PC and it’s been a minute since I’ve messed with computer hardware. I purchased two retro cases and they have two different power supplies (pictured). I was just wondering if both PSU’s will be fine to hookup to my motherboard (QDI v4p895grn)? They seem to have different …

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Re: Advice on finding Asus VL/I 486SV2GX4 motherboard

Posted on 2020-06-08, 17:00

by

by brettp11

in Milliways

in Milliways

cyclone3d wrote on 2020-06-06, 23:16: Why do you want this specific motherboard so much? Nostalgia of course! 😀

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Re: Advice on finding Asus VL/I 486SV2GX4 motherboard

Posted on 2020-06-06, 22:45

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by brettp11

in Milliways

in Milliways

I’ve looked everywhere but I guess I’ll just keep looking. I’m willing to go up to $500 for a working one if someone has any leads. Thanks guys!

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Advice on finding Asus VL/I 486SV2GX4 motherboard

Posted on 2020-06-06, 19:22

by

by brettp11

in Milliways

in Milliways

Hi, I know this isn’t a marketplace but I’m looking for a Asus VL/I 486SV2GX4 motherboard. Any advice other than eBay on where to find one of these things? I’m willing to pay top dollar but I’m having difficulty finding a single one for sale on the entire planet. Thanks.

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