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Re: 486 SX 16 & 20 MHz

Posted on 2021-03-08, 19:48

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Doom just loves the 486 architecture. The SX-16 is very close to the DX-40 in Doom, but quite behind in the rest of the benchmarks. Interesting results though, as I was competing with my friend's SX-25 when I was young (I had a DX-40). Mine had 128kb of external cache, and his didn't have any, so …

Re: 486 SX 16 & 20 MHz

Posted on 2021-03-08, 16:12

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Doom just loves the 486 architecture. The SX-16 is very close to the DX-40 in Doom, but quite behind in the rest of the benchmarks. Interesting results though, as I was competing with my friend's SX-25 when I was young (I had a DX-40). Mine had 128kb of external cache, and his didn't have any, so …

Re: Socket A: Nvidia vs Via - battle of the platforms!

Posted on 2021-03-08, 16:06

in Marvin \ System Specs

in Marvin \ System Specs

Yes, but at the time there was another factor that played a part in the decision, price! Nvidia was always more expensive, so it was interesting to compare Nvidia with SoundStorm vs Via + dedicated sound card. Maybe the money you saved by going the VIA route could be spent on a better sound card …

Re: Socket A: Nvidia vs Via - battle of the platforms!

Posted on 2021-03-08, 03:04

in Marvin \ System Specs

in Marvin \ System Specs

It's very interesting seeing SoundStorm making that big of an impact vs the onboard sound on the KT880, even with a kind of overpowered cpu (for the time). I wonder how things would look if you use an Audigy 2 or X-Fi on the KT880...

Re: ET4000AX variants

Posted on 2021-03-06, 22:11

in Marvin \ Video

in Marvin \ Video

ET4000C, interesting!!! Found this here on Vogons about it: Tseng ET4000C

Re: ET4000AX variants

Posted on 2021-03-06, 12:34

in Marvin \ Video

in Marvin \ Video

Grzyb wrote on 2021-03-06, 08:33: I would like to know if there's any difference between all those ET4000AX variants... Yeah, me too. Does the "plain" ET4000 even exist, or are all of them ET4000AX?

Re: ET4000AX variants

Posted on 2021-03-04, 22:36

in Marvin \ Video

in Marvin \ Video

Can't find the datasheet for ATT20C490 (can anybody help?), but I guess it latches 24 bits from 3 cycles. ATT20C490: https://datasheetspdf.com/pdf-file/530532/AgereSystems/ATT20C490/1 ATT20C491: https://datasheetspdf.com/pdf-file/530534/AgereSystems/ATT20C491/1 I have a really nice Genoa …

Re: Intel and AMD 486 subtle differences

Posted on 2021-02-08, 19:34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would point my fingers to the BIOS. The 486 cpus from intel and AMD are _identical_ in every respect, except as you correctly said, the microcode in the "N" AMD chips. What happens if you "cheat" your motherboard and setup your AMD processor as if it was an Intel one? Do the jumpers differ or the …

Re: Fastest socket 7 build on a 430tx chipset

Posted on 2021-02-05, 17:05

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This is awesome. I wonder how it will compare to the traditional MVP3 and Aladdin V chipsets at those speeds...

Re: 486DX PC running really slow. Thoughts?

Posted on 2021-02-04, 18:08

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

rmay635703 wrote on 2021-01-18, 23:49: 58B9B76C-4F42-4774-BE1C-204B6928ABF2.pngEven the original 486-20 had a DX in the long string on the bottom of the chip (from what I can remember) Cant find a pic of a survivor from 1989 Here

Re: 80386 BIOS image collection

Posted on 2021-02-01, 16:15

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

#88 Manufacturer/Identifier: PCCHIPS M326 V5.2 Chipset: SARC RC4018A4 + SARC RC4019A4 // (UMC UM82C491 + UMC UM 82C493F (according to this thread)) BIOS: AMIBIOS 10/01/93 ID string: 40-0100-001437-00101111-080893-4386-0

Re: 80286 BIOS image collection

Posted on 2021-02-01, 16:01

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

#59 Manufacturer/Identifier: PC CHIPS M209 Chipset: UMC UM82C206L BIOS/Version: VERSION 2.32 BIOS-ID: S286-6181-101590-K0 Note: photo of the motherboard courtesy of AmoRetro.de

Re: 80386 BIOS image collection

Posted on 2021-02-01, 15:35

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

#87 Manufacturer/Identifier: Morse M3 V3.00 Chipset: Morse 4L04F1282 + 4L04F1666 + 92A206S // (OPTi 82C391 (according to this thread)) BIOS: AMI ID string: 30-0201-ZZ1216-00101111-050591-386DX-0 Note: picture is from V3.10 motherboard, but they are almost exactly the same.

Re: 80386 BIOS image collection

Posted on 2021-02-01, 15:19

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

#86 Manufacturer/Identifier: Octek Jaguar V rev 1.4 Chipset: Macronix MX83C305FC + MX83C306FC BIOS: AMI ID string: 31-0100-426069-00101111-121291-MXIC-0 Note: this is the same motherboard as #36, but his BIOS doesn't match mine. Different SHA1. I dumped the rom with a GQ4X eeprom burner and I know …

Re: Please help identify this 386 motherboard

Posted on 2021-01-30, 22:57

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sorry to bump this thread, but I have the exact same motherboard (great performer btw!) and I'm having problems using it with an FPU. I've already tried 2 of them (both of them are IIT 4C87DLC-40) and it hangs at boot time. I've tried EVERYTHING with no positive results. Can any of you guys check …

Re: 80386 BIOS image collection

Posted on 2021-01-30, 20:53

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

#85 Manufacturer/Identifier: PC CHIPS M321 REV 2.7 Chipset: OPTi 82C391 (according to this thread ) Notes: * photo of the motherboard courtesy of AmoRetro.de * I have 2 of these motherboards (physically identical, same revision, etc), and none of them work. One has been affected by A LOT of …

Re: Are all IIT 387 FPUs the same? 3C87 =/= 4C87DLC after all?

Posted on 2021-01-28, 16:05

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So I ran HWiNFO for DOS and it recognizes the FPU as IIT 3C87 at 37.3 MHz. I would attach a screenshot, but for some reason all text in HWiNFO is blinking for me (using an STB Systems ET4000AX), which my crappy phone camera can't deal with and refuses to focus on the monitor picture at all. Yep, …

Re: Are all IIT 387 FPUs the same? 3C87 =/= 4C87DLC after all?

Posted on 2021-01-28, 13:04

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Mumak wrote on 2021-01-28, 06:49: Would be interesting to know if the 1002FC is recognized as Intel or IIT in HWiNFO: Re: HWiNFO support of vintage hardware It's probably the exact same core, but yes, would be interesting to know if there is consistency.

Re: Are all IIT 387 FPUs the same? 3C87 =/= 4C87DLC after all?

Posted on 2021-01-27, 21:59

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here it is, you can find IEEETEST in Disk2.zip

Re: Are all IIT 387 FPUs the same? 3C87 =/= 4C87DLC after all?

Posted on 2021-01-27, 21:55

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'd be happy to test my 1002FC chip, but where could I download this IEEETEST program? Searching for it has proven completely fruitless. If I remember correctly, it's part of the Cyrix Fasmath software suit that came with the Cyrix FPUs. A big selling point for them were "100% IEEE754 compliant". …

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