Re: Some questions about a Hercules card

Posted on 2020-10-24, 16:35

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

EXT C G = EXTernal Character Generator You can install there a 2764 ROM chip with some font, eg. one with national characters. Thanks ! I have one MDA/CGA card with a ROM chip and a few with empty socket and never really figured out why only the one has one... Should remove it and see what …

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Re: Some questions about a Hercules card

Posted on 2020-10-24, 15:23

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Edit: Have a look at this card: https://arvutimuuseum.ee/th99/v/P-R/50414.htm Yes very close to the card and settings should be similar The sockets are for a BIOS chip and Octal latch. Those would add CGA capability if not included in the motherboard iirc. The jumpers are for setting the video Mono …

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Re: Bought these (retro) hardware today

Posted on 2020-10-24, 15:09

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by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I spurged today. I bought this all for $60. I haven't identified some of it yet. I'm kinda curious about this weird Creative video card. And I found an extremely early Creative card. Game Blaster? If I'm not mistaken. CT7230 is just MPEG2 decoder (PC-DVD Encore). CT1350B - that's Sound Blaster 2.0 …

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Re: # Transistors in the DRx2 & Ti-486SXL ?

Posted on 2020-10-24, 01:09

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by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This guy wrote a fair write up of the Cx486Dr2 and states it has a 1K L1 cache but does not mention the transistor numbers...it appears to be a clock doubled Cx DLC from his description http://ps-2.kev009.com/ohlandl/8570_Tim_OConnor/cyrx.htm Cannot find anything specific about the Ti SXL series... …

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Re: external l2 cache issue - 486 socket 3 mobo

Posted on 2020-10-24, 00:42

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Couple things: Your cache cannot go bad just because you flashed the BIOS. It looks correct for 256K using 4 chip+TAG. TRY: Set the L2 Cache Update Scheme to WR-Through like L1 is and see what happens. ( I can see that is the other choice in the new BIOS) Ok I cannot extract the "original.tmp" from …

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Re: My first Real-Time Clock chip mod

Posted on 2020-10-22, 20:26

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by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well it is not pretty but if it works then you did good ! I always just dremel to find the battery pins, severe the GND one and solder the new battery holder (or wires) to the "now" exposed pins. There is really no need to remove the old battery if you use an epoxy or black silicon to cover up the …

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Re: I recently found this hardware, AKA the Dumpster find thread.

Posted on 2020-10-21, 23:52

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by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

...and last pics - other stuff isn't really worth showing, some random cables, peripherals, electronic boards from some devices (with some nice sockets and logic chips I will desolder)... Anyway, can't wait to check if these things still work or not. Nice ! I always get a laugh at the old Mono / …

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Re: Bought these (retro) hardware today

Posted on 2020-10-21, 22:34

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by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Bought a MS Sidewinder 3D Pro in original box with docs, software etc from local thrift store. Looks like it was never used. Can't take a picture until my phone gets a charge. Somewhere in the garage I have a few Logitech and MS joysticks stored but did not label the storage boxes so not sure if I …

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

Posted on 2020-10-20, 22:58

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by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I already installed the board in a case, so here is a mixture of pictures I took before without paying attention to specific details and some images I could take after opening the case (with the board installed). I hope, Horum, that everything you need is visible... Yes that is great ! Thanks ! …

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Re: Anyone went nuclear and replaced all AT PSUs with ATXs?

Posted on 2020-10-20, 02:14

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by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I came across it recently, sorry it took so long to post photos. Maybe I should have just replied with a PM but the forum only lets me attach 1 picture if I do it that way. This is from a Proliant 800 with an LPX dual Pentium Pro 440FX motherboard. Since the "P5" connector might be something …

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Re: A few newbie questions about a Tandy 1000SX

Posted on 2020-10-20, 01:16

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by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hmm ..Some Tandy 1000's used IBM DOS and all the plain versions of Mode.com for IBM DOS v 3.2 were about 18Kb except for one Tandy special one that about 40Kb in size. Technically if you upgrade to 3.3 from 3.2 and keep the original Mode.com it should work fine (is not like going from DOS 3 to DOS …

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

Posted on 2020-10-19, 23:23

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

For anyone with the same problem: The board I was looking for information for is the Octek HIPPO COM Rev. 1.2. The zip archive contains the manuals for the board versions 1.0 and 1.1. The description of the 1.0 version in the respective manual differs a lot from what the 1.2 version actually looks …

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Re: Dumping KM23C1010 mask ROM

Posted on 2020-10-18, 21:07

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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

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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

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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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