Re: Chips & Technologies two chipset F84021 and F84025 for 486 and 386 boards.

Posted on Today, 11:09

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Update, this is best I could find after going thru a bunch. The cs4021 and cs4025 pinout and descriptions are in this: https://www.datasheetarchive.com/pdf/download … 6DX%2520chipset

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Re: Chips & Technologies two chipset F84021 and F84025 for 486 and 386 boards.

Posted on Today, 04:03

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well AFAIK some of the C&T chipsets the datasheets were kept in house.. Only thing I found was a "Prelim" mentioning 4021 and 4025 as part of the C&T CS4000 "WinChips" chipset and 84021 Bus/Dram controller and 84025 Data buffer.. https://www.datasheetarchive.com/pdf/download.php?id= …

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Re: Best approaches to install baby AT motherboard in ATX case?

Posted on Yesterday, 03:14

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

BitWrangler wrote on Yesterday, 02:41: Yah, I've usually found 3 holes lining up and for all the rest the plastic spacers with the latching button shaved. Yes have done that many times, cut the nub off the button of the plastic "slide in" spacers 😀

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Re: Acculogic RAMpAT! - Anybody with a working card here?

Posted on Yesterday, 03:07

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This is how i use the RAM controller. The config.com can be run from regular DOS prompt, you don't need a bootable diskette. It works well with 4Mb of installed system memory (in the motherboard slots). With 16Mb of installed system memory the RAMPath config utility shows 0Mb capacity. May test …

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Re: Acculogic RAMpAT! - Anybody with a working card here?

Posted on 2023-02-05, 20:46

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Right, it does a bunch.

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Re: Adlib Gold and VLB FDC conflict

Posted on 2023-02-05, 20:18

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Has anyone tried masking the DACK2 ISA pin B26 just to see what happens ? Does the card require 2 DMA's ? sorry didn't search about it.

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Re: Acculogic RAMpAT! - Anybody with a working card here?

Posted on 2023-02-05, 20:13

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I noticed that there is a good number of programmable logic chips on the PCB. I read somewhere that these don't normally hold their data for more than 30 years. Is this true? And if so, good chance that the three of us on here with bad cards are out of luck. The datasheet says 10 years on the …

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Re: Acculogic RAMpAT! - Anybody with a working card here?

Posted on 2023-02-05, 14:45

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Does anyone have a Winimage bootable diskette image for this card (non-Plus)? Do have a few diff versions (1.1, 1.2 and 1.3 iirc) of the RampAT standard driver/setup archives. Here they are in .IMA format so should be able to Winimage them to 720k or 1.44m if needed. The IMD image you posted is …

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Re: ISA Bus expansion to secondary case

Posted on 2023-02-04, 12:38

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

They have lots of .pdf's on their website but only found this for the PTRC https://www.accesio.com/MANUALS/PTRC-AT%20THI … 0TO%20CHECK.PDF added: also found this: http://analoginput.com/MANUALS/PTRC-AT%20INST … INSTRUCTION.PDF

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Re: Help! Micronics/Gateway 2000 486 Motherboard Mysteriously Dies!

Posted on 2023-02-04, 03:36

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Probably bad caps, and being SMT that makes it harder to figure out which ones. Are you sure the PSU is also not failing ? added: did the batteries die ? I see it uses an external battery and may not boot up if they are dead....

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Re: Bought these (retro) hardware today

Posted on 2023-02-04, 02:15

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Bought a SiiG brand metal HD USB enclosure for cheap ($5) claiming to be PATA/SATA compatible but is not, only SATA and exactly like this: https://www.siig.com/superspeed-usb-3-0-to-sata-3-5-enclosure-pro.html?gclid=CjwKCAiA_vKeBhAdEiwAFb_nraRI31ECfWX7gyhzTI-hx_ …

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Re: ISA Bus expansion to secondary case

Posted on 2023-02-04, 01:56

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Nice ! Never played with them but had seen them before a few times. This link may give some info: http://web.archive.org/web/20020822223849/http://accesio.com/go.cgi?p=../bus_exp/ptrc_at.htm If you look close they are the same adapters.... added: looks like 2011 was last time on their website with …

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Re: Modula Tech 386 AT-mainboard, no video, no speaker sound

Posted on 2023-02-03, 23:19

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Actually the "rabbit" on the ASUS ISA-386c MH doc says 64Mb using 8x4mb simms on board and 8x4mb simms on the mem expansion card. Some of the others at TRW show max of 16Mb and some show 32Mb.... Very few show using 4mb simms at all...

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Re: $8 PCI-E PATA controller

Posted on 2023-02-03, 03:58

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If it were an "active" DVI-HDMI adapter be worth keeping but my guess is a generic cheap passive type, not like the better Startech active ones (have one some where and actually works great, hmmm where did I put it 🤣)

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Re: $8 PCI-E PATA controller

Posted on 2023-02-03, 01:29

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

douglar wrote on 2023-02-03, 00:51: Ha! What I got in the mail was an DVI-HDMI adapter. Did not expect that at all. 🤣 nice seller. Guess the one review with 1 star out of 5, was correct ;p

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Re: An IDE disk initialized on an older machine is inaccessible on my late model pc

Posted on 2023-02-03, 01:26

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Are you sure it got formatted with FAT32 ? Only Win95 OSR2 and above can format FAT32. Original Win95 and Win95a only does FAT16. What size hard drive ? What exact type of USB-IDE adater ? WIn10 and 11 recognize Fat32, NTFS and ExFat internal and external USB devices.

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Re: Ericcson MFM HDD CHS settings?

Posted on 2023-02-02, 19:38

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yeah the MN # gives it away.. Cylinders 989 Heads 5 Sector/track 17 Write Precompensation 128

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Re: Math Coprocessor speed question....

Posted on 2023-02-01, 23:37

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

never mind you found it. There is some good info and "it" here: Re: Are all IIT 387 FPUs the same? 3C87 =/= 4C87DLC after all?

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Re: Help me to identify this MB

Posted on 2023-02-01, 23:09

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Have not had time to track down the exact board BUT In your picture the 66.6667Mhz black rectangle (in red highlight below) should be the main CPU/BUS crystal. That would support a 33Mhz CPU. The Y2 missing crystal is for Async operation of the Math-co (goes in the W 3167 socket). The green …

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Re: Adlib Gold and VLB FDC conflict

Posted on 2023-02-01, 03:05

by

by Horun

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is it real Adlib Gold (like the 1000) or some clone card ? I like 486 VLB with good VLB IDE and video and never had an issue with Media Vision PAS 16, though not an Adlib Gold, MV is my preferred 486 ISA card ;p

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