Re: ideal ISA video setup 386/486-era motherboard setup

Posted on 2020-05-11, 19:56

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Experience: These clone luggables use oddball video card LCD controller that drives LCD is always specific to LCD panel. Keep it paired and keyboard also are made to fit together with their luggable chassis if you have missing one, use a AT or PS/2 with adapter keyboard anyway. Also I had issues …

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Re: Bought these (retro) hardware today

Posted on 2020-05-11, 19:46

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Look for pentium cpu with retail intel heatsink attached? Cheers,

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Re: Dead motherboard Intel MU440EX, any advise to fix it?

Posted on 2020-05-11, 18:55

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Careful. Look for the Dell part number first. The dallas battery backed modules needs to be modified with external battery first as some oddball boards refuses to boot with exhausted battery in them. Cheers,

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Re: Socket 604 cooler on socket 423

Posted on 2020-05-11, 18:52

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Does the case standoff lines up with your socket 423 holes? If not, and if the weight of the socket 604 heatsink is similar to consumer heat pipe heatsinks. Just figure out to mount 604 heatsink anyway. Cheers,

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Re: Not recognized MCA Ethernet on an IBM PS/2 57 SLC2

Posted on 2020-05-11, 18:36

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

PS/2 MCA bus requires working setup in different way. I have one model 70 and had 85 and knew what to to. Model 57 SLC2 is all 16 bit MCA slots due to 386SX-like CPU means has to be 16 bit MCA cards. Second, you need a diagnostic and setup disk with needed ADF files (that takes much doing to find …

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Re: Model M keyboard with PC/AT instead of (stock) Model F: strange issue

Posted on 2020-05-11, 18:16

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Do a pull up resistors mod on the clock and data line inside the keyboard. Cheers,

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Re: Having problem registering at http://www.vcfed.org.

Posted on 2020-05-11, 01:48

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Currently as of now these days from long searches, there is currently no available PSU for compaq deskpro M series. I need that pinout so others can build adapter to use ATX PSU on it. If I have a PSU for deskpro M series, this will be a golden time even loaned one in semi-working, broken state or …

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Re: Having problem registering at http://www.vcfed.org.

Posted on 2020-05-10, 20:35

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have special place for compaq as I can actually use these compaq especially with audio cards where one cannot do with PS/2 which far more easier document for power supply pinout than compaq's. I used to have PS/2 at first but no longer active with it. Therefore, must document the power supply …

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Re: Bought these (retro) hardware today

Posted on 2020-05-10, 02:16

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Miniscribe, oh the memories, nasty model, keep this on your museum shelf. 100% failure rate. Cheers,

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Re: 1 vs 2 SDRAM sticks -- which is better

Posted on 2020-05-10, 02:03

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

440BX no. (cannot use 8 chip 256MB). 815 or any newer chipsets that supports 8 chips memory works fine. Cheers,

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Re: Having problem registering at http://www.vcfed.org.

Posted on 2020-05-10, 01:59

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The way the question of this is worded and it had a "C" in the field when I got there for first time before all this goof up. No where in that question said anywhere and is not related to the anwser. Basically english mashup. Anyway, I'm in! Cheers,

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Re: Having problem registering at http://www.vcfed.org.

Posted on 2020-05-10, 01:28

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today's u1pdate: Going no where. I keep getting this error after entered "Computers". What am I supposed to do it correctly to get correct "value" it asks for? You did not enter the correct format for the What is this forum all about? field. Please read the field description for the expected format. …

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Re: Having problem registering at http://www.vcfed.org.

Posted on 2020-05-10, 00:43

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Wow. Was asking to confirm, not to show my lapse of mind, I did enter "Computers" once, still get error during trying to register few days ago. I'll try again and let you know. That week was hectic at work shoveling series of cellphones and occasional game consoles fixing them for customers. Cheers,

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Re: Bottom line missing at DOS command prompt with one VGA card and only on CRTs

Posted on 2020-05-09, 19:50

by

by pentiumspeed

in Marvin \ Video

in Marvin \ Video

No problem! This is the reason why I test several resolutions when calibrating the CRT monitors, My previous job was Samsung authorized along with few brands authorized us to fix theirs in warranty and able to repair out of warranty as well, meant I had special jig tools that allowed me to access …

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Re: I accidentally bought a PC Chips M919

Posted on 2020-05-09, 16:44

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

386 and 486 single 72pin dimm is one bank. FPM only. 80ns to 60ns Pentium and later used 64 bit data path and requires two 72pin matched set is one bank. EDO or FPM 60ns or less. Cheers,

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Re: Bottom line missing at DOS command prompt with one VGA card and only on CRTs

Posted on 2020-05-09, 16:39

by

by pentiumspeed

in Marvin \ Video

in Marvin \ Video

Your monitor is not adjusted properly or capacitor failing in the CRT. Get a alignment lines with colors grid up. https://www.youtube.com/watch?v=ONUCwXyUu9g When I had former job repairing CRT and TV I use this similar to this. Important to check out each CRT monitors so they are set to standards. …

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Re: Chinon Fz-502 5.25" floppy drive

Posted on 2020-05-09, 14:24

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Cannot do that. 1.22MB drive; you can only write and read only to 1.22MB disks. 360K drive; ditto only to write and read to 360K disks but only read by 1.22MB drive. The differences are: track width of the 1.22MB is narrower by 50% than 360K head's track And second difference is write amplification …

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Re: Having problem registering at http://www.vcfed.org.

Posted on 2020-05-08, 14:27

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm hoping for anyone who already is a VCF member, could respond. Cheers,

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Re: Compaq Deskpro M and XL models.

Posted on 2020-05-08, 03:24

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

*Important request to make*: Anyone with Deskpro M series can you do this? Hi good to see you pop up with your 386/33m and XL. Can you measure voltage when 386/33M computer is off and powered on for pin 1 (rearmost and is on pin 1 right side row (on the motherboard's power connector pin 1 is marked …

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Having problem registering at http://www.vcfed.org.

Posted on 2020-05-08, 02:36

by

by pentiumspeed

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Need to register there since one poster has same issue with power supply for the compaq deskpro M that I'm trying to fill in my questions. Need to register to see rest of his posts. vintage computer forum registeration form asks: "Additional Required Information (profile) What is this forum all …

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