Re: Do the 3.3V Pentiums work on 3.4V?

Posted on 2024-01-22, 17:18

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

[...] Sounds like I really need to get a 3.5 V CPU in there sooner than later because 3.3V and split voltage seems to be unsupported. There's a huge difference between running 3.3V spec CPU at 3.4V (no problem, in spec and actually done quite frequently to improve stability) and running 2.8V spec …

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Re: Do the 3.3V Pentiums work on 3.4V?

Posted on 2024-01-21, 10:39

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This board doesn't support split voltage, so that 3.4V/3.5V is fed to the core too. The only Pentium MMX that supports that is the Overdrive. If this is a non-overdrive MMC it's being overvolted by at least 0.6V, which is over 20% and so and way out of spec. The P55C core is so robust it (pretty …

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Re: Unpack the blind box

Posted on 2024-01-20, 12:44

by

by dionb

in Marvin \ Sound

in Marvin \ Sound

[...] Just wish it had an OPL3 in it. Yesterday I found two OPL2s under my bed. Does that count? Not in a sock but in a static protection thingy, fortunately. I'd been soldering a bit earlier this week and tipped my spare chip box. I thought I'd found everything but clearly I missed those OPLs :P …

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Re: Roland sc-55 on 486 or Pentium?

Posted on 2024-01-20, 12:37

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

[...] very interesting, it's almost the opposite of what some people told me, at this point I imagine that either your system is not very compatible or this card needs to be moved from one system to another as needed. It's not the computer but the longevity of the SC-55 as the most used synth for …

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Re: WDM hardware complient for Windows 98SE

Posted on 2024-01-20, 12:21

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just take a look in the driver files themselves. If you see .VXD, they're VXD drivers. If not, they're WDM. But... WDM enhances stability by giving drivers less privileged access to hardware. Sounds great but means some functionality doesn't work. For starters devices with WDM drivers aren't …

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Re: Why does Half Life 1 barely work on my a22e?

Posted on 2024-01-19, 15:33

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I don't think any Pentium 3 era laptop had more than 8MB VRAM. Toshiba Satellite 1800's (Celeron 800) had a Trident CyberBlade 8MB GPU, Compaq Armada M700 (Pentium 3) had an ATI Mobility PRO 8MB GPU... This was after the VRAM era in any case, the Toshiba Satellite 1800 had an ALi Cyberblade Aladdin …

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Re: Old ISA 8bit LAN Card help!!!

Posted on 2024-01-19, 15:07

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That also, is not a NIC. This, however, is. https://www.ebay.com/itm/325848775649?hash=item4bde19bbe1:g:O14AAOSwKYFlKy0a&amdata=enc%3AAQAIAAAA4E12K9NrFrSTytkoDxjRasHuULF67YyZoxfbS1e3yZTw9gJScMnQkJTIRAzZp41o99uPQTMT1x9TNsbgMNq6BxhgnqfdE407o6PkZMHj2% …

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Re: Old ISA 8bit LAN Card help!!!

Posted on 2024-01-19, 15:01

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks a lot for repling.....I though it was a LAN card for PC....sorry It is a LAN card, just not an Ethernet LAN card. When you go to stuff this old, it's not safe to assume everything conforms to the same standards everything uses today - even if the connector looks familiar. Back in the 1980s, …

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Re: Vesa Local Bus Video card VRAM

Posted on 2024-01-18, 22:42

by

by dionb

in Marvin \ Video

in Marvin \ Video

[...] I just want to put something together with the NOS MoBo and this card, they were found together in a storage closet so figured I might as well make something of them, a DOS 6.22/Win3.1 machine would be just fine I think? I lasted from 1995-early 1999 with a 1MB card in my Pentium 60 system, …

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Re: Vesa Local Bus Video card VRAM

Posted on 2024-01-18, 21:51

by

by dionb

in Marvin \ Video

in Marvin \ Video

[...] So it's good as is for a 1mb card? Yes. VESA compatibility is as near perfect as you're going to get, performance is within 1% of highest you can have in DOS, and generally the build quality - and so image sharpness -was at least decent. They're not hugely loved or sought-after cards, but if …

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Re: Vesa Local Bus Video card VRAM

Posted on 2024-01-18, 20:59

by

by dionb

in Marvin \ Video

in Marvin \ Video

Problem is the integrated DAC. It can only offer those higher modes interlaced, which is eye-melting. This is one of the best 1MB cards, but pretty pointless with 2MB. For 2MB, look for S3 chips (any), Cirrus Logic GD-5434 and Trident TGUI9440 for higher modes, or Tseng ET4000/W32P for interlacing …

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Re: UMC UM85C418F RAM - 2MB possible + desirable?

Posted on 2024-01-18, 20:56

by

by dionb

in Marvin \ Video

in Marvin \ Video

It's probably only for an obscure interlaced mode like 1280x1024@8b interlaced, like with Cirrus Logic GD-542x chips. Bad news here - my 74HCT245N chips have arrived, I've removed the dead chip from my burnt-out card and soldered in the new one. It does now let the system boot - no more shorts - and …

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Re: Why does Half Life 1 barely work on my a22e?

Posted on 2024-01-18, 11:48

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I also suspect the GPU. That's a business GPU, not intended for gaming. I recall playing Half Life acceptably (not well) back in the day on office systems with Celeron 466 and i810 integrated VGA using software rendering under NT4. If it will work on shared memory UMA, any dedicated VGA will work …

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Re: AMD K5 compatible socket5 motherboard list.

Posted on 2024-01-17, 21:57

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A lot of boards support it but not all, just check the manual of any board you are considering. Intel is notorious for not letting non-Intel CPUs work on their OEM motherboards (BIOS limitation), so no surprise that this CPU won't work on Zappa.

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Re: Exposing the ISA bus on late 90s/early 00s machine

Posted on 2024-01-17, 11:49

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It all depends on the chipset. Intel was pretty rigorous in dumping legacy from 1999 onwards, so there is no full ISA bus present on the 800-series chipsets. Only way to get an ISA bus there is with a bridge chip. Other chipset vendors such as Via kept an integrated PCI-ISA bridge in their …

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Re: 486UL-P101 486 board works with 30 pin 256Kx4 edorams but not working with 72 pin 4MB-8Mb EDORAMS or mixed configs.

Posted on 2024-01-16, 22:02

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

30 pin EDO RAM does not exist. OK, so what? Does it help me? If you want us to help you, it helps if we know exactly what components your are trying to combine. More specifically: very few 486 chipsets (and so motherboards) support EDO. So if you are trying to run 72p EDO SIMMs on them, that …

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Re: Unknown board Pentium

Posted on 2024-01-16, 17:46

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

[...] It has an S3 Trio64 V+ with 2Mb. Yes, it would mainly be for DOS, although I have installed Windows 98. I have a few games from that time that I was never able to play... haha. But they don't require much graphics (from the time, of course) That's perfect for DOS, best compatibility and …

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Re: First post about sound cards

Posted on 2024-01-16, 10:47

by

by dionb

in Marvin \ Sound

in Marvin \ Sound

That is one really nice card. Yamaha YMF724 cards are pretty common, but too often the cards are cheaply made. This one is clearly a quality product and the Toslink digital output is an outstanding feature. Cards with this chip are good early Windows 95/98 options as they have a very nice MIDI synth …

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Re: Bought these (retro) hardware today

Posted on 2024-01-16, 09:15

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Another Compaq AP550 with dual 1Ghz PIII processors and an HP Kayak XAs. How I wish for the decadent luxury of sounding almost bored with finding a system with i840 chipset in what looks like pristine condition ;) Can't complain too much, I have the internals of one as well, including the foghorn. …

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Re: Pentium 4 machines with small form factor but AGP and PCI slot? (re: compact pentium 4 machine)

Posted on 2024-01-16, 01:57

by

by dionb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Look on theretroweb.com, filter for Socket 478, 1x universal AGP and form factor MicroATX (139 options) or FlexATX (1 option) If you want something smaller than that it might be worth looking into (uATX) desktop cases with AGP+PCI risers.

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