Re: Are CF cards my problem or...?

Posted on 2024-03-03, 21:54

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In my case, the following applies: 1. All CF cards were purchased new between 2014 and 2022, most from Amazon (store, not third-party vendors), a couple from Mouser and few from other retail stores that I picked up directly from shelves. 2. Some were written to, others just opened from their …

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Re: UDMA 5 with DOM's & CF's

Posted on 2024-03-03, 18:46

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

p.s. those DOMs have a similar controller to the 32MB Transcend-PSD330. The Doms had SM223TF-AC While the Transcend-PSD330 had SM2236G-AC Filename Transcend-PSD330.jpg File size 1.42 MiB Views 90 views

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Re: Are CF cards my problem or...?

Posted on 2024-03-03, 18:16

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just wanted to add that my experience with CF cards have been exactly those as described by OP. I have purchased brand new compact flash cards from Amazon, multiple brands such as Kingston, Sandisk and Verbatim, with sizes ranging from 512Mb to 32Gb. Some of these cards were used just once, others …

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Re: Are CF cards my problem or...?

Posted on 2024-03-03, 18:13

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I also forgot to mention that some motherboards detect the adapter as always being a 40-pin cable and throw a warning at the BIOS screen on boot. That's because you have a device capable of UDMA 4 or faster plugged with pin 34 connected ( AKA you don't have an 80 wire cable ) If you short pin 34 to …

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Re: Are CF cards my problem or...?

Posted on 2024-03-03, 15:35

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The adapters seem to be entirely passive and foolproof but some machines don't like certain adapters. I've discovered some differences in the past 2 years for the 40 pin pata to 50 pin pata adapaters-- Some have voltage regulators of various quality for cards that require 3.3V but the cheaper ones …

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Re: Are CF cards my problem or...?

Posted on 2024-03-03, 13:53

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I’m in the group that has not had compact flash devices spontaneously die, but I have had bad luck with some micro SD cards over the years, especially ones that I move between sockets/devices. Not to underestimate your frustration or ability, because maybe you got really unlucky, but Occam’s razor …

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Re: How to get and validate DMA mode for disks in Windows 3.1?

Posted on 2024-03-02, 19:10

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Jo22 wrote on 2024-03-02, 18:50: That's why I'm so glad about that MicroHouse driver, which works with generic IDE ports, too. …. That standard esdi_506.pdr wasn't the only one around. Is this the driver that you are talking about? http://vogonsdrivers.com/getfile.php?fileid=2070

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Re: How to get and validate DMA mode for disks in Windows 3.1?

Posted on 2024-03-02, 18:39

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, I'm sure it works perfectly for you in the artificial environment of three things plus a benchmark installed. Perfect? You over estimate my success immensely! "This card fits in that slot but not this slot because it hits the CPU" "That card fits in this slot but not in that slot because it …

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Re: How to get and validate DMA mode for disks in Windows 3.1?

Posted on 2024-03-02, 17:37

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Seems like the Promise 20630c VLB controller must have some sort of DMA controller in it that lets it do 32 bit DMA over VLB and it can do DMA in real mode and protected mode. hehe we already talked about this one https://www.vogons.org/viewtopic.php?p=1157548#p1157548 https://www.vogons.org/ …

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Re: How to get and validate DMA mode for disks in Windows 3.1?

Posted on 2024-03-01, 21:56

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Seems like in order to get an IDE drive is working in multi word DMA mode, you would have to have VLB or PCI controller, yes? https://en.wikipedia.org/wiki/WDMA_(computer) While it looks like "DMA 0" could be implemented on an ISA bus, seems unlikely that you can get multi word DMA 0 working through …

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Re: How to get and validate DMA mode for disks in Windows 3.1?

Posted on 2024-03-01, 13:25

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you for info on MFM controllers. So after all there were three legitimate user of ISA DMA - floppy, MFM until AT, and sound cards because Creative lazy :). ... Intel was, and is again with Gelsinger back, famously run by engineers. Cant play ignorance with Andy Grove at the wheel :) This guy …

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Re: How to get and validate DMA mode for disks in Windows 3.1?

Posted on 2024-03-01, 03:43

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

kingcake wrote on 2024-03-01, 03:40: What does "transfer the image" mean? I would read/write the image with DD then resize the partition to the new card size. I made a *.VHD file of the 256MB CF from win image and then wrote the VHD image to the 512MB CF as a 512MB volume.

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Re: How to get and validate DMA mode for disks in Windows 3.1?

Posted on 2024-03-01, 03:36

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I thought I'd set up a nice 256MB DOS622/Win311 image that I could use for testing this. Got it all built and I can use 32 bit disk access and such, but while the 256MB CF will do PIO3 and PIO3 w/ IORDY, it doesn't do multi-word DMA. So I tried to transfer the image to a 512MB CF that does do DMA …

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Re: Booting from SSD with a pre-UEFI bios

Posted on 2024-02-28, 22:11

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello, I've got a Biostar p4m900-m7 se motherboard, a curious one that supports all the way from dual floppies (including 5,25'') to SATA. It appears to have that old, DOS-interface BIOS which doesn't really let you select boot mode. I've got Windows 8 on one SSD drive, installed and ready to …

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Re: How to get and validate DMA mode for disks in Windows 3.1?

Posted on 2024-02-28, 19:46

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

However, since the AT added 16-bit ISA bus mastering support (e.g., as used by SCSI cards), it's interesting as to why PIO was used for the AT disk controller instead of that. Anyone know? I think it might be because the SCSI cards were adding a relatively small amount of circuitry to an already …

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Re: How to get and validate DMA mode for disks in Windows 3.1?

Posted on 2024-02-28, 15:53

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I’m no expert, but I think what you are describing is the way busmaster DMA worked for PCI. and VLB, and ISA like Adaptec AHA-1540/42. Basically any third party device capable of taking over role of 'master of the bus' :-) Like I said, I'm not an expert on this and I'm trying to figure out out, so …

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Re: How to get and validate DMA mode for disks in Windows 3.1?

Posted on 2024-02-27, 05:36

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by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

you need hardware that supports it, has own DMA engine so intel 430 or higher, and appropriate driver. There is this https://www.vogonsdrivers.com/getfile.php?fileid=398 claiming windows 3.1 support so apparently I was wrong :) There was never official Microsoft busmastering drivers nor official …

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Re: How to get and validate DMA mode for disks in Windows 3.1?

Posted on 2024-02-26, 18:57

by

by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My experience is that you need to have a vendor provided driver for your storage controller and you need a storage device that likes your driver and your controller. The Promise drivers from that era let you specify the transfer modes as passed parameters and would let you know if they worked or not …

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Re: Batman’s Revenge Build

Posted on 2024-02-25, 01:46

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by douglar

in Marvin \ System Specs

in Marvin \ System Specs

if you had a period correct case, you would not even have it. I see no need for a NIC. The thing is that it’s a gateway OEM motherboard that has an AT form factor with ps/2 mouse and keyboard mounted on the board, so I cant just stick it in any AT case. Not that I’m complaining. I like having the …

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Re: Win98 PC to Windows 11 PC Internet Connection Sharing

Posted on 2024-02-25, 01:15

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by douglar

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You can get a WiFi bridge on eBay <$25 if using the pc as a router doesn’t work out

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