Re: Dumping KM23C1010 mask ROM

Posted on 2020-10-18, 21:07

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Can't find a lot of info on this rom, and it's not in my minipro chip supported list. Any suggestions as to what I can use to read this chip? It's the ROM of a fairly rare system it seems, I'd like to archive it for posterity. It is a Samsung 128KX8, CMOS, DIP32 and the datasheet is out there but …

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Re: Toshiba external floppy drive compatibility

Posted on 2020-10-18, 20:50

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In few days I get a Toshiba Satellite 210CS to my laptop collection. My laptop goes with CD-ROM, but with no FDD. I find some variants. One of them is seems to be a PA2652U floppy drive. Original one is PA2611U. At first sight (as I can see it on photos) they have similar connector, but maybe any …

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Re: Mysterious XT keyboard issue with extended keyset

Posted on 2020-10-18, 20:38

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It smells like a buggy or incompatible keyboard bios routines. Late reply, other projects getting in the way, but his might be it. If I use a BIOS ROM that I flashed with a later date Phoenix BIOS, it works just fine to load the charset via KEYB. Weird thing is the machine was sold in Sweden back …

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Re: Unisys CWP4663 - 486 DX2 system - Phoenix BIOS

Posted on 2020-10-18, 20:04

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I found it! Buried in the wayback machine. This is an update for the Tulip TC40 1996-10-21. I flashed it on my CWP4663. You need a clean boot floppy formatted with format a: /s, copy the content of this archive and use update.bat. What I observed: - it fixed the large disks in DOS - it correctly …

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Re: Need info about 486 board [Octec EP40085R12 Rev. 1.2]

Posted on 2020-10-18, 19:02

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That is a "Octek HIPPO COM" 486 board. There is an odd doc set here: https://www.elhvb.com/mobokive/archive/octek/486/Hippo%20COM/index.html added: OK.... converted the old Word Pefect 1993 formated files to newer MS Word .DOC and Adobe .PDF. Not that great of a conversion but they are readable.... …

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Re: Upgrading an old Phoenix BIOS

Posted on 2020-10-18, 14:20

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sorry my choice of words was not very good, having the best quality image is important for many reasons.

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Re: Pentium 1 motherboard questions.

Posted on 2020-10-18, 04:23

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Do you mean that with intel chipset even if I would set the dip switches for 133Mhz it would still be running at 120Mhz? NO it would run at 133Mhz, Pentiums are not clock locked, just multiplier locked. The P120 runs 4x at 30Mhz, if you increase clock to 33Mhz it will run at 133Mhz....hope that …

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Re: Upgrading an old Phoenix BIOS

Posted on 2020-10-18, 02:51

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oh uh this image is useless for me, I need a image of the whole board without anything coming over it (cards, cable, disk bay ...) Please do not take this wrong but think you are being a bit too picky and using the words "Oh uh this image is useless for me" is a bit extreme as any photo is better …

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Re: Pentium 1 motherboard questions.

Posted on 2020-10-18, 02:28

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Do you mean that with intel chipset even if I would set the dip switches for 133Mhz it would still be running at 120Mhz? NO it would run at 133Mhz, Pentiums are not clock locked, just multiplier locked. The P120 runs 4x at 30Mhz, if you increase clock to 33Mhz it will run at 133Mhz....hope that …

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Re: 486 PSU questions

Posted on 2020-10-18, 00:48

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have one of the same boards the OP is using and I remember running into an issue where it didn't beep when no RAM was in. Of course, I could have had something else messed up at the same time. Also, it seems sometimes those who didn't grow up with this stuff refer to all 72-pin SIMMs as EDO, so …

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Re: Help identify 486 VLB motherboard

Posted on 2020-10-17, 23:43

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I do not think it is a GXA486 variant (but could be) due to most GXA486 variants had PCI slots near the memory slots which this does not. It could be a very early version of the GXA486 but finding any docs will be hard, Unfortunately most of the Epox 486 board docs are long gone.

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Re: Pentium 1 motherboard questions.

Posted on 2020-10-17, 23:38

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The P120 with Intel chipset will run PCI at 30 MHz which isn't a big loss. However, I am yet to see a P120 that wouldn't run at 133 MHz... Agree ! Most all P120 will run fine at 133 Mhz (33mHz bus) as long as the heatsink and fan are of good quality. The more metal on the heatsink the better if …

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Re: Pentium 1 motherboard questions.

Posted on 2020-10-17, 22:55

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

More than 256k Cache does not help most games in my experience, as long as all the memory is cached you are in the sweet spot. You will gain some going to a P120 from a P100 (but not as much as going to a P133) due to the P120 PCI bus will run at 30Mhz versus 33Mhz for P100 or P133. So you gain …

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Re: Every PC XT power supply busted?

Posted on 2020-10-17, 22:19

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is the VGA card a true 8 bit card ? I have one old VGA 8 bit that gives odd noisy video but my Oak OTI037c works great on XT's. Also have some Oak 67 and 87 based ISA VGA that work perfect in 286/386 boards. Added: have a few 16bit ISA VGA that have a jumper for 8bit mode and they work fine on XT's …

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Re: Pentium 1 motherboard questions.

Posted on 2020-10-17, 19:56

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks. I found that earlier and I also found a manual at https://www.elhvb.com/mobokive/archive/Tmc%20-%20MyComp%20-%20Mynix/manual/AI5TV13D.PDF even though both are for different version of the motherboard since mine doesn't have usb headers and mine only has 4 memory slots. It doesn't really …

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Re: ASUS PVI-486AP4 motherboard fsb jumpers?

Posted on 2020-10-17, 17:15

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Finished scanning the manual, took awhile, 94 pages!! lot of excercise running up and down stairs to the scanner and trying not to damage the manual. I have attached it to this post, front inside page of manual states it is manual revision 1.2, dated August 1994, and for mainboard Rev 1.6 and up. …

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Re: MS5129 PS/2 header

Posted on 2020-10-17, 16:44

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Good work !

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Re: What game are you playing now?

Posted on 2020-10-17, 14:50

by

by Horun

in Milliways

in Milliways

Am still playing AOE 2 the HD version. Have tried some of the old add-on campaigns from original AOE 2 and they do work, some have minor glitches but good fun !

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Re: Alltronics has vintage computer parts cheap:

Posted on 2020-10-17, 14:47

by

by Horun

in Milliways

in Milliways

Thought I should update that those particular TOPMOTOR heatsinks and fans are 2" and for Pentiums not 486....

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Re: CD-rom drive and no brand.

Posted on 2020-10-17, 14:18

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have some mid 1990's cdrom with Apple labels that are actually Sony and Matshushita. Also a DVD with a Office Depot 2006 label (a rebranded Lite-On) so yes as Jo22 says.... there are OEM and BULK drives that can be a bit hard to figure out who made them. Nero Infotool or other hardware CDROM diag …

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