Re: BIOS Flashing on a Compaq Presario 5284

Posted on 2020-04-20, 00:59

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Have a few old Compaq boards from about the same era and they are very OEM specific. Not just the BIOS but the boards themself are made to Compaq specs (one requires a straight floppy cable, not one with a twist like standard as an example) so electrically very different from most retail boards. …

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Re: What retro activity did you get up to today?

Posted on 2020-04-19, 23:19

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have 2 - XT's, 2-486's, 2 Pentiums, two P4's as complete machines plus a few newer (i5, i7) completes. Lots of boards, vid cards, etc but they do not take up the space of finished bunch of "beige towers" as you said. Yes I am in that boat ! with a handful of cases in the shed that will probably …

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Re: What 386 motherboard do I have ?

Posted on 2020-04-19, 22:56

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

mpe wrote on 2020-04-19, 22:29: Manufacturer is TMC Research Corporation Model PAT3XPL I think this model will be similar enough for wiring https://stason.org/TULARC/pc/motherboards/T/T … 6-PAT38XPL.html I think you are correct !

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Re: What 386 motherboard do I have ?

Posted on 2020-04-19, 21:51

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Uhh ...I cannot see the panel connectors that are probably on the bottom left side of the first photo which your camera cut off... From Google get this dual 10pin connector, is that the same ? edit: removed bad link

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Re: What retro activity did you get up to today?

Posted on 2020-04-19, 04:54

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The solder sucker is Engineer SS-02 (made in Japan) and it's very nice, much nicer than the cheap junk that is common on eBay. My soldering iron (not shown) is A-BF GS90D: this is a thermostatic soldering iron, very well made, I've been using it for the past 5 years without any trouble. Thanks ! …

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Re: Unknown Coppermine CPU

Posted on 2020-04-19, 02:15

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

How to read Intel data matrix: https://www.intel.com/content/www/us/en/suppo … processors.html

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Re: Commodore PC 40-3 Dallas RTC chip

Posted on 2020-04-19, 01:48

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If your board has a CMOS clear jumper you want a 12887A or 12C887A, if your board does not have a CMOS clear jumper then a non- A variant will work just fine. RAM Clear Function (DS12885, DS12887A, andDS12C887A)

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Re: Does anybody have a BIOS image for an IWILL SIDE IDE/SCSI VLB controller?

Posted on 2020-04-19, 01:32

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The aic-6360 Adaptec chip can work without a BIOS but only if there are jumpers to set the IRQ, Port, etc. I attached the AIC-6360 util to check it's settings from within DOS, you might want to see if it recog's the scsi part.

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Re: Help identify two 486 VLB motherboards

Posted on 2020-04-19, 01:05

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Try this site - https://arvutimuuseum.ee/th99/#1 Look for something unique in the layout of your boards and start comparing to the images under "Socket 2,3. 486 " I have the MH TH99 library on my HD and looked thru all the pics, none matched. A few were close but the jumpers were off. I think the …

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Re: Help identify two 486 VLB motherboards

Posted on 2020-04-18, 17:51

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Top one looks sorta like a Biostar / Bioteq motherboard. Can you pull the ROM and save an image of it ? Even using a bootable NIC and uniflash to get it would be a help to hex edit and read the Award BIOS string. The bottom board has no ROM so that won't help with it....

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Re: Apple Mac Quadra 700 laborious to repair

Posted on 2020-04-18, 17:14

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It would be nice if you would post that with pictures in the "System Specs" section instead of just generating traffic for your YouTube channel. Same with your IBM 5162 thing, etc. Yeah ! or even a quick description with a few pictures under "What retro activity did you get up to today?" would be …

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Re: VTech / Laser computers history

Posted on 2020-04-18, 17:01

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

After doing some research think I found that the board 35-2527-01 only truly supports 128k of cache and it must be 15nS (20nS hangs the POST). The manual for board 35-2528-11 states 128k cache and the jumper settings are identical (except for location on the board) compared to 35-2527-01. I only …

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Re: VTech / Laser computers history

Posted on 2020-04-17, 03:41

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I see your's came with a Trident 8900 ISA video card same as mine. Curious if yours had a SX or DX cpu. Mine had DX but also the Mathco socket was soldered where on your board it was missing. Just curious. Mine has the original ST3283A Seagate HD which still works ok. Most of the directories are …

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Re: VTech / Laser computers history

Posted on 2020-04-16, 13:40

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I was looking for jumper settings, upgradeability, cache info etc. Dionb, you hit the nail on the head with the 35-xxxx-xx idea. I had to take out my 3.5 floppy drive but I found it. It's 35-2527-01. Thanks ! That does appear to be same board as mine but will have to strip the computer down a bit …

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Re: VTech / Laser computers history

Posted on 2020-04-16, 04:36

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My Leading Tech PC Partner EQ. Has extended AT backpanel includes two serial and parallel. 12 -30 pin SIMM slots, a riser with 5 ISA, onboard HD and floppy. edit: will try to get better pics tomorrow. All the Vtech serial tags are on everything but the sound card an modem so is mostly stock.

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Re: VTech / Laser computers history

Posted on 2020-04-16, 04:10

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Unfortunately that is not the same board I have. Mine has long version backpanel AT with I/O (serial, parallel etc) . Mine also has 12 - 30 pin SIMM slots and onboard HD and floppy controllers/ports and no PCI. I have looked for years and never found an exact match. Will post some pics after I dig …

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Re: Advanced Computer Technology 35-7024-00-00 + Harris CS80C286-25

Posted on 2020-04-16, 03:54

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

just because the IIT has the 387 core doesn't necessarily mean that it behaves the same as the 287xl with respect to clocking Well, according to "coproc.txt" it does behave like 287XL Also, I have the datasheet from IIT, which states: "the IIT-2C87 can operate on the same clock as the 80286" ... …

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Re: Adapter for old CHS ("small") IDE drives

Posted on 2020-04-16, 00:35

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Another option to consider is using an old PCI IDE controller through a PCI to PCI Express adapter . In that case, make sur to get a PCI IDE controller that has drivers for you OS of choice or use it under plain DOS . Good choice ! Just make sure the PCI IDE card does not require the dongle to an …

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Re: BIOS image collection - requests, discussion etc

Posted on 2020-04-16, 00:30

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

HanJammer wrote on 2020-04-15, 17:14: #60 Board ID : Generic 386SX board (sometimes called HT18 Rev. 2.0) Chipset : Headland HT21A BIOS : Phoenix 07/28/91, on a 27C5 […] Show full quote #60 Board ID : Generic 386SX board (sometimes called HT18 Rev. 2.0) Chipset : Headland HT21A BIOS : Phoenix 07/28 …

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Re: Advanced Computer Technology 35-7024-00-00 + Harris CS80C286-25

Posted on 2020-04-16, 00:07

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

just because the IIT has the 387 core doesn't necessarily mean that it behaves the same as the 287xl with respect to clocking True. Intel did license IIT as the first for clones of the 80287 iirc (or maybe they were just the first to make a replacement that Intel did not object too) but then it …

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