Re: 3DFX Banshee issue

Posted on 2022-05-24, 22:26

by

by rasz_pl

in Marvin \ Video

in Marvin \ Video

you can boot computer with two cards, one agp and pci, then in windows look into device manager for the banshee/unknown device - will tell you if the card is totally dead or only problem with the output

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Re: Fixing a 3DFx Voodoo 3000

Posted on 2022-05-24, 22:23

by

by rasz_pl

in Marvin \ Video

in Marvin \ Video

You can test broken traces by squeezing individual memory chips with your fingers and then starting up computer, or running something rendering graphics on whole screen and squeezing ram chips one by one. Order of operations is important because just reconnecting broken trace wont show up on the …

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Re: Best 128gb compact flash card

Posted on 2022-05-22, 23:28

by

by rasz_pl

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

as mentioned CF were tuned for single stream storage, fastest IO would be sata/mpcie ssd + sata/mpcie-to-PATA converter

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Re: 386 Motherboard Repair

Posted on 2022-05-21, 21:24

by

by rasz_pl

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

am hopefully closer to getting the board working. you arent :( >Over the last year and a half I have been watching board repair videos posted by Necroware yet you didnt even clean the corrosion properly :(. This board requires desoldering a shitton of components and fixing broken traces/vias. This …

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Re: 386 Motherboard Repair

Posted on 2022-05-20, 02:09

by

by rasz_pl

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

green 8bit isa slot means corrosion is all the way under SIMM sockets. Either traces of vias are eaten away there

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Re: General ISA Bus Mastering musings/questions.

Posted on 2022-05-15, 09:57

by

by rasz_pl

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The Adaptec 154x cards can perform bus master DMA to ANY memory address in the first 16MB. This included video RAM and any other RAM mapped to the UMA on peripheral cards. Thats the theory, the nitty gritty details is where I cant find any information The might be stuff in the fine print spoiling …

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General ISA Bus Mastering musings/questions.

Posted on 2022-05-14, 03:47

by

by rasz_pl

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Plenty of EISA Bus Masters, but why bother when 3rd party DMA controller on EISA bus was apparently full speed with no stupid ISA 3MHz 2 cycles per byte 8237 limitations? A ton of PCI chips supported Bus Mastering (for example S3 ViRGE) but a lot of CPU chipsets didnt (sis/via/amd athlon ones?) so …

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Re: GA-5AX prices on Ebay are outrageous; why?

Posted on 2022-05-13, 01:34

by

by rasz_pl

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A lot of poor people suffering SS7 25 years ago = lot of potential clients. Not to mention some genius sat on a money printer ON button for two years and shat $5 trillion into the economy. Ebay 'sold listings' shows there are people willing to pay >$200, and most listings are Chinese recyclers, they …

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Re: Tomb Raider 1 voodoo 5500 1024x768 resolution??

Posted on 2022-05-12, 23:05

by

by rasz_pl

in Marvin \ Software

in Marvin \ Software

Meatball wrote on 2022-05-09, 18:04: Other options for the original Tomb Raider for 1024x768 include: Power VR (practically unplayable at this resolution, DOS/Win9X) another video showing 20-30 fps https://www.youtube.com/watch?v=5GMesT4WKzI

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Re: AGP video card blanks in and out, possible causes?

Posted on 2022-05-12, 02:44

by

by rasz_pl

in Marvin \ Video

in Marvin \ Video

You might have problem with power on the Voodoo, ripped/leaky capacitors? All the L are filters (together with capacitors near them), they cut out high frequencies (harmonics). You would not have a proper picture at all if one of them was damaged (open). Instead of guessing its best to slap an …

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Re: What vintage CPU socket saw the biggest increase in CPU horsepower from release to retirement?

Posted on 2022-05-11, 12:53

by

by rasz_pl

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Con 2 botones wrote on 2022-05-10, 12:55: Just considering the socket alone is a bit tricky to me. Take socket A for instance, a board from the the KT133 chipset era would not let you go above Palomino. my Asus A7V worked fine with Thoroughbred 2200+ @ 2GHz (20.0x100fsb). There were even people …

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Re: I bought a DOM 64gb so you don’t have to. (Or do you?)

Posted on 2022-05-11, 12:17

by

by rasz_pl

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My first guess would be ATA IDENTIFY https://wiki.osdev.org/ATA_PIO_Mode#IDENTIFY_command returns something BIOS doesnt like and gets confused. Someone would have to slap a logic analyzer on the IDE bus to get to the bottom of the problem. I wouldnt call flash storage reliable and sturdy per se, but …

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Re: SY-5EMA+ writing cache becomes disabled

Posted on 2022-05-11, 12:10

by

by rasz_pl

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

in the bios look for write-back write-thru switch, it looks like putting unsupported amount of ram disables WB

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Re: Retro PC freezes while gaming, repeats last audio.

Posted on 2022-05-10, 20:30

by

by rasz_pl

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

you have too much ram for pentium any way you slice it, just pull 2x32 out and recheck audio looping after freeze is "normal", software crashed but last programmed auto DMA cycle is still running

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Re: Graphics card for Windows 3.11 and Nt3.51 in high resolutions (1600x1200 and higher)

Posted on 2022-05-10, 14:48

by

by rasz_pl

in Marvin \ Video

in Marvin \ Video

Jo22 you could pump 16-24bit to external DACs in two-three clocks (similar/same as https://www.vogons.org/viewtopic.php?p=957494#p957494) probably source of some early SVGAs funny resolution limits in higher color depth despite not being ram speed limited. One of my favorite finds: InfoWorld Oct 20, …

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Re: Just how bad is the 5:4 stretch with DOS Games

Posted on 2022-05-10, 14:18

by

by rasz_pl

in Marvin \ Video

in Marvin \ Video

afaik all 19 inch LCDs are 5:4

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Re: Voodoo 1 Missing transparency in POD

Posted on 2022-05-09, 14:05

by

by rasz_pl

in Marvin \ Video

in Marvin \ Video

no bios/firmware on voodoo 1/2 why not underclock the cpu, and then the card itself, for sanity check? FBI (the lower one) chip is responsible for blending, probably soldering on it needs refreshing

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Re: Sound Blaster 16 question

Posted on 2022-05-09, 07:42

by

by rasz_pl

in Marvin \ Sound

in Marvin \ Sound

The CT1741 is the DSP. Creative traditionally used 8051 microcontroller here https://en.wikipedia.org/wiki/Intel_8051 https://www.os2museum.com/wp/sound-blaster-the-french-connection/ The CT1748A is the so called ASP / CSP chip. It may be used for decoding and encoding simple audio algorithms like …

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Re: Cirrius logic cl-gd5428 ram upgrade.

Posted on 2022-05-08, 14:31

by

by rasz_pl

in Marvin \ Video

in Marvin \ Video

Cuttoon wrote on 2022-05-08, 11:19: As has been mentioned, more RAM won't make the VGA faster. But, you still totally should upgrade that card, it will be a very rewarding thing to do. the only reward will be availability of two additional interlaced modes

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Re: What 386 motherboard does this ram card use

Posted on 2022-05-07, 18:25

by

by rasz_pl

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

breath slowly 😀 the way you phrased first post ("8bit portion of the ISA bus") it sure sounded like you tried booting it in all of your 386 boards

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