Re: mTCP hangs..

Posted on 2022-03-28, 20:38

by

by mkarcher

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just to be very clear, mTCP doesn't care if your card is full duplex or half duplex. But it is totally dependent on the packet driver. And just to support mbbrutman: The issues with the 3c905 packet driver and mTCP are clearly rooted in multiple bugs in the packet driver. mTCP would work perfectly …

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Re: mTCP hangs..

Posted on 2022-03-27, 22:12

by

by mkarcher

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a 3Com 3C905, and the packet driver (3C90XPD.COM) loads successfully at boot. This is my CFG for running with a STATIC IP: PACKETINT 0x60 IPADDR 192.168.1.23 NETMASK 255.255.255.0 GATEWAY 192.168.1.1 NAMESERVER 192.168.1.35 MTU 1500 Regardless of whatever mTCP software I call, the computer …

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Re: Cache memory

Posted on 2022-03-27, 10:55

by

by mkarcher

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you very much for your answer, it could be worth these that I have found: https://es.aliexpress.com/item/4000490415083.html?spm=a2g0o.productlist.0.0.41762527dCgjWT&algo_pvid=e11a374b-f1ae-4c0f-81b5-6edac37e8b15&algo_exp_id=e11a374b-f1ae-4c0f-81b5-6edac37e8b15-0&pdp_ext_f=%7B%22sku_id%22%3A% …

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Re: Cache memory

Posted on 2022-03-26, 20:45

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by mkarcher

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, where can I get cache modules PC 330-486, PC 350-486 board. It has to connect 8 memory banks up to 256kb. Here are the specifications of my board: https://stason.org/TULARC/pc/motherboards/I/IBM-CORPORATION-486-PC-330-486-PC-350-486.html That board requires nine standard fast CMOS SRAM chips, …

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Re: CT3670 2x16MB RAM only detecting 512kb

Posted on 2022-03-26, 08:59

by

by mkarcher

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks mkarcher for pointing me in the right direction. :) You're welcome! Main takeaway for you: Always describe your issues with as much detail as you did here. The information that 2* bog standard 1MB modules were recognized as 512KB instead of 2MB, but passed the test was the key point that …

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Re: Matrox G450 (with DVI outout) working on a HOT433 main board (UMC 8881)

Posted on 2022-03-24, 23:03

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by mkarcher

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

During investigation of those problems, I was annoyed to not have tools like setpci and dd with access to /dev/mem, as I am used to from linux machines, in DOS. My experience with DOS ports of pciutils has been quite poor, so I just rolled my own (intentionally minimal, like no support for PCI …

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Re: My 486 UMC8886/8881 Project (Version 2.0)

Posted on 2022-03-24, 22:50

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by mkarcher

in Marvin \ System Specs

in Marvin \ System Specs

Well, it did run fine with 33 MHz FSB. But the G450 did NOT boot at 40 MHz FSB. The reason was that the early BIOS code has divided the PCI clock to 20 MHz, but the Matrox did not like such a low PCI clock. That's not something you can't fix using a BIOS patch, so here we go: https://www.vogons.org …

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Matrox G450 (with DVI outout) working on a HOT433 main board (UMC 8881)

Posted on 2022-03-24, 22:48

by

by mkarcher

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Running a modern graphics card with those old PCI chipsets proved to be a challenge. The Matrox G450 main chip is built for the AGP, so it can not be directly connected to the 5V PCI bus in older mainboards. So Matrox decided to put a bridge chip on the G450 PCI. The BIOS I'm currently running on …

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Re: CT3670 2x16MB RAM only detecting 512kb

Posted on 2022-03-23, 23:15

by

by mkarcher

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Same issue with all sticks, card only detects 512kb. So this means that 1M sticks are detected as 256K sticks. The only difference between these sticks is that 256K sticks use address bits A0-A8, whereas 1M sticks use A0-A9. So if RAM sound fonts are working fine up to 512KB, you should inspect A9 …

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AWARD BIOS modding hint: possible misflash by AWDFLASH

Posted on 2022-03-17, 18:43

by

by mkarcher

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Trying some tricks on the Shuttle HOT433 with a (probably unofficial / homebrew modified) BIOS, I encountered the problem, that different AWDFLASH versions I tried resulted in the situation that the BIOS enters the boot block recovery mode - although the image I tried to flash created by modbin (or …

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Re: The "best" S3 Virge cards to buy?

Posted on 2022-03-17, 16:32

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by mkarcher

in Marvin \ Video

in Marvin \ Video

I dispute that VBE 2.0 is not quite common though, seemed to be on all the s3s my buddies had, even the trio models back in the day. I think what's happening is that the bottom of the barrel cards that nobody wants without it, are most commonly for sale and cheapest. Get into some "virgin" junk …

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Re: Mediatek SY1816 -- how to get started?

Posted on 2022-03-14, 21:36

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by mkarcher

in Marvin \ Sound

in Marvin \ Sound

So, your AD1816-based card is a PnP card that needs initializing. Once you do that, it supports AdLib (Yamaha OPL) but does not sound good doing it, it also supports Sound Blaster and Sound Blaster Pro digital audio (with some compatibility issues) but mainly it's a hardware implementation of the …

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Re: 8-bit VRAM write on a 16-bit ISA graphics card, fast or slow?

Posted on 2022-03-14, 17:59

by

by mkarcher

in Marvin \ Video

in Marvin \ Video

There are no penalties, but the bandwith doing 8-bit MOVs instead of 16-bit is just half. It's not that easy. A 16 bit graphics card need not accept a 16-bit cycle under all circumstances. If the card feels like doing 8-bit access only in a certain video mode, it is free to do so. A lot of non-FIFO …

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Re: Tests/Info welcome: Reverse engineering the SB16 ASP/CSP

Posted on 2022-03-12, 08:24

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by mkarcher

in Marvin \ Sound

in Marvin \ Sound

I had a SB16 ASP back in the day (still got the box, manuals and software, but not the actual card), and I've often wondered about this little-used feature. It's surprising how limited the chip is. 512 words of memory is tiny. The 512 words of "external RAM" is supported by two banks of internal …

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Re: Tests/Info welcome: Reverse engineering the SB16 ASP/CSP

Posted on 2022-03-11, 06:29

by

by mkarcher

in Marvin \ Sound

in Marvin \ Sound

Wow, this is insane. I have some SB cards with the CSP, and can provide testing if required. My idea is to accelerate the sound engine in FastDoom, mainly the stereo separation and volume calculations. Maybe this is the first time an ISA card could be used as an accelerator on old systems. Don't …

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Re: Tests/Info welcome: Reverse engineering the SB16 ASP/CSP

Posted on 2022-03-10, 19:55

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by mkarcher

in Marvin \ Sound

in Marvin \ Sound

I'm also very interested on this topic, wonder if it's possible to program directly the CSP and use it as a coprocessor. Saw some days ago someone selling a ISA devkit card for the ST18932, but not very cheap. Yes, that's possible. You are quite limited by the program space of just 512 (32-bit) …

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Re: Tests/Info welcome: Reverse engineering the SB16 ASP/CSP

Posted on 2022-03-09, 22:20

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by mkarcher

in Marvin \ Sound

in Marvin \ Sound

The CT2760 with CSP arrived. As I already expected, CTADPCM playback works out-of-the-box on that card, both with the original CSP program by Creative Labs as well as with my patched program. The programs differ slightly in how they time data transfer from the PC to the CSP. On the CT2830 I used …

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Re: Snark barker troubleshooting

Posted on 2022-03-09, 21:57

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by mkarcher

in Marvin \ Sound

in Marvin \ Sound

"DSP Write Test" is where things seem to fail. I can't see anything there. All I see is the signal being stuck to high. However I can hear in the audio output that something is happening. (A very slight noise when the test runs) Is my 20MHz oscilloscope too slow to view the signal ? Is there a …

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Re: Compaq ProLiant 5000 pci video card makes the SCSI card not detect drives

Posted on 2022-03-07, 19:57

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by mkarcher

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is there any way to fix that? And would a rage 128 have that issue? If the SCSI controller uses normal PCI procedures to set up the BIOS, the base address will be chosen automatically, and my idea is wrong. On the other hand, if the mainboard BIOS installs the SCSI BIOS at a fixed address, you …

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Re: Tests/Info welcome: Reverse engineering the SB16 ASP/CSP

Posted on 2022-03-07, 17:20

by

by mkarcher

in Marvin \ Sound

in Marvin \ Sound

I always knew my digging up the ASP's identity out of USENET archives (and probably QuestStudios Forums archives too) would come in handy one day! EDIT: Let's give credit for digging it up out of USENET archives to Cloudshatze: https://web.archive.org/web/20140909172843/http://queststudios.com/smf/ …

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