Re: Does anyone have a Fujitsu M2243AS MFM hard drive?

Posted on 2023-05-04, 18:15

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I literally was given one of these drives, so I was able to find the location of the missing resistor and it looks to be Red, Orange, Green, Brown (2.3M 1%). My drive also apparently has a short (one of the rails measures 37 ohms but the DMM says shorted?). My PCB board revision is a little …

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Does anyone have a Fujitsu M2243AS MFM hard drive?

Posted on 2022-10-10, 21:07

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I recently acquired one of these old full-height voice coil MFM drives, but the faceplate was completely missing, and one of the resistors that normally sits behind the faceplate has been destroyed by whatever it was that impacted the faceplate. The repair manual scan on bitsavers is nearly useless …

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Re: Anyone have experience with an M845EG motherboard?

Posted on 2022-07-01, 20:47

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Update because I forgot this thread exists: the BIOS has no support for manually controlling DMA channels for ISA.

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Re: 20th Anniversary of Vogons

Posted on 2022-07-01, 00:20

by

by themajortechie

in Milliways

in Milliways

😳

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Re: Socket 5/7/SS7 (Multiplier Mini) Tweaker (Beta)

Posted on 2022-06-19, 04:40

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

👀

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Re: Socket 479 (Pentium M) Motherboard with DMA enabled ISA. Models?

Posted on 2022-05-27, 04:23

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Look for something with an ITE 8888 PCI to ISA bridge chip. Something like this should work: Diebold MBATX 845E G2B REV 3-2 3ISA motherboard TT2 (Apologies for necro-ing) I have just confirmed the hard way that the BIOS does not support manual DMA configuration, making it incredibly hard to get a …

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Is it possible to add controls for DMA resource configuration to an AwardBIOS rom?

Posted on 2022-05-27, 04:17

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I recently bought an Adlink M-845EG motherboard, which, in having an ICH4 southbridge and an ITE8888 PCI to ISA bridge chip, should for all intents and purposes have support for ISA DMA. It appears to be almost identical to the Diebold MBATX 845E G2B. The problem with this board is that despite …

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Re: Pentium 4 industrial motherboard ? Portwell PEB-7702G2A with ISA slots!

Posted on 2022-05-01, 04:32

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by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

yup lmao there's a reason why i'm not getting that board. yet.

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Re: Pentium 4 industrial motherboard ? Portwell PEB-7702G2A with ISA slots!

Posted on 2022-05-01, 04:18

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sphere478 wrote on 2022-05-01, 04:17: I think Tonkus recently came across a isa socket 775 mobo. Lemme tag him and see if he can share. No, the board I got is a 478 board. For now the 775 is either unobtanium or far too expensive for me to afford. 😜

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Re: Pentium 4 industrial motherboard ? Portwell PEB-7702G2A with ISA slots!

Posted on 2022-05-01, 03:42

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

After 4 years, I'm just now coming back to this system. I've built up quite a collection of other hardware I've been playing with in the interim. Since y'all have some interest again, I'll work with this system a little more. Right now I only have WinXP installed. I need to try 98, DOS, and an ISA …

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Re: Anyone have experience with an M845EG motherboard?

Posted on 2022-05-01, 03:40

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've found another post here mentioning that the Diebold board is identical to a Portwell motherboard. The person who got that particular board never reported on whether or not ISA DMA was confirmed working... Pentium 4 industrial motherboard ? Portwell PEB-7702G2A with ISA slots!

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Anyone have experience with an M845EG motherboard?

Posted on 2022-04-30, 07:52

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've been looking for a good socket 478 board with decent ISA DMA support, and I came across this board: https://m.aliexpress.com/item/32900248400.html It has an ite8888 bridge chip, which is known to have good sound card compatibility, and a pre-ICH6 Southbridge, which means that the DMA signals …

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Does anyone have a BIOS dump for a GSI Model 21 (1533-21-03-6) dual FDC + IDE card?

Posted on 2022-03-28, 22:19

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I recently bought this card for the ability to run four floppy drives at once, and I was able to enter its configuration setup screen. However, the BIOS failed to save the settings and instead hung the system indefinitely, forcing me to have to shut down the computer. As a result, the BIOS on the …

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Re: Dual amd K6 computer

Posted on 2022-03-06, 07:26

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Recently a few others and I have been digging into what exactly all those resistors and capacitors under the lids of k6 cpus are. https://www.vogons.org/viewtopic.php?f=46&t=85071 Which led to a wonderful discovery^ Today I was examining more of fritz’s pics And, This one was of particular interest …

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Re: Huge number of K6-2E+/570ACZ CPUs for sale on eBay

Posted on 2022-02-21, 06:00

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sphere478 wrote on 2022-02-21, 05:14: guys, you're gonna love this... everyone needs to see this (256k cache enable mod) SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod Mod the cache, crank the voltage to 2.1v for a stable 630MHz, and go crazy.

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Re: Upgrade CPU Gateway P5-75?

Posted on 2022-02-13, 23:03

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I can confirm that you can put a K6-233ANR into a socket 5 board. My AP53-1, despite being Socket 7, isn't split-voltage, and electrically is more or less identical to Socket 5, and I have run that exact CPU in it in the past.

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Re: AOpen AP53 not POSTing?

Posted on 2022-01-22, 22:01

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've tried with 8MB SIMMs instead, and an ISA VGA card. Still nothing happens, and it doesn't complain about RAM when none is installed either. I already got my refund and the board is now in my parts box. 😜

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Re: XT-FDC errors (no XT-IDE in use)

Posted on 2022-01-21, 23:49

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just in case as well, I disabled the onboard FDC of my Asus P5A in BIOS and in the Multi-Floppy BIOS configuration. I'm using this board at the moment because I already have it set up on my testbench. The XT-FDC is currently configured to be the primary FDC.

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XT-FDC errors (no XT-IDE in use)

Posted on 2022-01-21, 23:45

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I recently assembled an XT-FDC using files from the Retrobrew wiki. The card works, and is able to seek the floppy disk when the computer starts up, but when actually attempting to boot, it rapidly seeks the floppy disk before throwing a "Boot failed, error 80" message. I know that the disks are …

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Re: AOpen AP53 not POSTing?

Posted on 2021-12-21, 08:24

by

by themajortechie

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Voltages read fine, and no beeps ever come up.

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