Re: Video RAM chips for a UMC TK-85C408VGA ISA Video Card?

Posted on 2024-04-10, 00:25

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by dJOS

in Marvin \ Video

in Marvin \ Video

As promised, the pictures of my card. It's a bit dirty but I'll try to clean it as soon as I can. It uses the same chip model as suggested by @pshipkov, but with a different speed. Does anyone know what the JP5 jumper does? It seems to be related to installed ram size, my card didnt work until I …

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Re: Video RAM chips for a UMC TK-85C408VGA ISA Video Card?

Posted on 2024-04-08, 23:27

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by dJOS

in Marvin \ Video

in Marvin \ Video

Cheers, some pics would be helpful. As promised, the pictures of my card. It's a bit dirty but I'll try to clean it as soon as I can. It uses the same chip model as suggested by @pshipkov, but with a different speed. Cheers, your cards PCB is identical to mine, even down to the footprint labels.

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Re: Video RAM chips for a UMC TK-85C408VGA ISA Video Card?

Posted on 2024-04-08, 23:22

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by dJOS

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in Marvin \ Video

rasz_pl wrote on 2024-04-08, 15:17: really curious now if adding 512KB translates into any performance gains It shouldnt make any difference, unless adding more ram also increases the memory bus width.

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Re: Video RAM chips for a UMC TK-85C408VGA ISA Video Card?

Posted on 2024-04-07, 07:46

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by dJOS

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in Marvin \ Video

Cheers, I’ll check my footprints against yours.

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Re: Video RAM chips for a UMC TK-85C408VGA ISA Video Card?

Posted on 2024-04-06, 22:24

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by dJOS

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in Marvin \ Video

Cheers, some pics would be helpful.

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Re: Video RAM chips for a UMC TK-85C408VGA ISA Video Card?

Posted on 2024-01-29, 04:05

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by dJOS

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I’d be surprised if it was compatible, VLB is very different from plain ISA.

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Re: Video RAM chips for a UMC TK-85C408VGA ISA Video Card?

Posted on 2024-01-28, 22:12

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by dJOS

in Marvin \ Video

in Marvin \ Video

Mine has the footprints for dip sockets too, but I suspect I would need to fill in the bank with the SMD footprints first or the card won’t work.

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Re: Video RAM chips for a UMC TK-85C408VGA ISA Video Card?

Posted on 2024-01-21, 10:03

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by dJOS

in Marvin \ Video

in Marvin \ Video

Well that is interesting, I put the card into my Pentium II and nothing. So I removed the jumper at JP5 and it fired right up!

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Re: Video RAM chips for a UMC TK-85C408VGA ISA Video Card?

Posted on 2024-01-21, 08:49

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by dJOS

in Marvin \ Video

in Marvin \ Video

Hmm, I wonder if I need to change a jumper on my board to get it working with less ram. I guess it’s possible mine didn’t work to start with and that is why ram was pinched from it.

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Re: Video RAM chips for a UMC TK-85C408VGA ISA Video Card?

Posted on 2024-01-21, 08:01

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by dJOS

in Marvin \ Video

in Marvin \ Video

DerBaum wrote on 2024-01-21, 07:23: i found another card that uses 26pin memory ics. http://www.amoretro.de/2012/09/trident-tvga90 … -768kb-isa.html The part numbers exist but seem to be rare too. Darn it, I can’t find much about that one either! 😩

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Re: Video RAM chips for a UMC TK-85C408VGA ISA Video Card?

Posted on 2024-01-21, 07:39

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by dJOS

in Marvin \ Video

in Marvin \ Video

i found another card that uses 26pin memory ics. http://www.amoretro.de/2012/09/trident-tvga9000b-grafikkarte-768kb-isa.html The part numbers exist but seem to be rare too. Nice, I found a couple of similar video cards too, but the ram part numbers and brand were lost to history. I’ll do some …

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Video RAM chips for a UMC TK-85C408VGA ISA Video Card?

Posted on 2024-01-21, 04:40

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by dJOS

in Marvin \ Video

in Marvin \ Video

Hi All, a very long time ago I came across a UMC TK-85C408VGA-2J-D08F ISA VGA card - someone had pinched 2 of the ram chips from it. Anyway, I actually need an ISA VGA card to test a 386DX-40 MB that I've just finished restoring and without the full complement of chips, it's useless. Anyhoo, the …

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Re: *START HERE* SoftMPU 1.91 - Software Intelligent MPU-401 Emulator

Posted on 2023-11-23, 02:20

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by dJOS

in SoftMPU

in SoftMPU

Pierre32 wrote on 2023-11-23, 02:03: Well except the PC MIDI card doesn't need SoftMPU. Buy it 😁 I don’t recall needing SoftMPU on the Yamaha cards as they are MPU401 Compliant. But to be honest it’s been a while since I used mine for MIDI. https://youtu.be/2_L_1tvH1Ew

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Re: *START HERE* SoftMPU 1.91 - Software Intelligent MPU-401 Emulator

Posted on 2023-11-23, 02:00

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by dJOS

in SoftMPU

in SoftMPU

danyetman wrote on 2023-11-22, 23:50: ...and of course, NOW I get a notification that the PCMIDI is in stock. Oh irony. 🤣, I have one and there’s no noticeable difference between the midi capabilities of it and the Yamaha card.

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Re: *START HERE* SoftMPU 1.91 - Software Intelligent MPU-401 Emulator

Posted on 2023-11-22, 09:10

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by dJOS

in SoftMPU

in SoftMPU

Yeah it’s not my first choice either. The main reason for using it in my case is it gives you Adlib sound and CMS / GameBlaster on an XT class machine. The Tandy sound is great, but Adlib has better support.

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Re: *START HERE* SoftMPU 1.91 - Software Intelligent MPU-401 Emulator

Posted on 2023-11-22, 06:58

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by dJOS

in SoftMPU

in SoftMPU

Nice, I’m currently adapting the picoGUS design for the Tandy 1000 EX/HX computers and adding in multi-IO functionality while I’m at it.

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Re: *START HERE* SoftMPU 1.91 - Software Intelligent MPU-401 Emulator

Posted on 2023-11-22, 05:33

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by dJOS

in SoftMPU

in SoftMPU

IIRC, the software doesnt fire up a bunch of bloated TSR's either - it just runs a config util at boot.

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Re: *START HERE* SoftMPU 1.91 - Software Intelligent MPU-401 Emulator

Posted on 2023-11-22, 04:44

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by dJOS

in SoftMPU

in SoftMPU

Just bought a YMF718 from ebay. I'm tired of screwing with the Audigy. https://www.ebay.com/itm/126192277090?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=0gZtjFOGRPe&sssrc=4429486&ssuid=emSuPrl8TC2&var=&widget_ver=artemis&media=COPY Nice, that has the same chip as the Audician 32 Plus that I have …

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Re: *START HERE* SoftMPU 1.91 - Software Intelligent MPU-401 Emulator

Posted on 2023-11-22, 03:28

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by dJOS

in SoftMPU

in SoftMPU

Eugh. I've been waiting for a PCMIDI in stock notification for a while. Supposedly, the Audigy 2 ZS IS compatible with SoftMPU, according to the Github wiki. I'm at the point that I might just grab a cheap CT4520 or something...I just didn't want to eat up my only ISA slot in the motherboard with …

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Re: *START HERE* SoftMPU 1.91 - Software Intelligent MPU-401 Emulator

Posted on 2023-11-22, 02:39

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by dJOS

in SoftMPU

in SoftMPU

I have a nice Win98SE machine: P3B-F with latest firmware to allow 1.4GHz Celeron on Slot-1 Adapter 512MB RAM Audigy 2 ZS (real SB0350) with the Control Unit and MIDI/Gameport bracket Now, I built a few MT-32PI units utilizing the BulkyMIDI-32 project, and under windows, they work a treat. I've got …

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