Problems with Pro Audio Spectrum 16 and PC MIDI clone card

Posted on 2022-02-01, 18:54

by

by lemonlime

in Marvin \ Sound

in Marvin \ Sound

Hi All, Is anyone using one of the PC MIDI clone cards with a Pro Audio Spectrum 16 by chance? Both cards work together fine, but only sometimes . There appears to be about a 50/50 chance that the PC MIDI card is functional once I boot up and get to the command prompt. In the situations where it …

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Re: Music Quest MPU clone cards, anyone interested in them?

Posted on 2022-01-24, 18:40

by

by lemonlime

in Marvin \ Sound

in Marvin \ Sound

oh yes , this is definitely a bad jack :o I can send you a replacement if you want on the plus side at least this damage is not a crippling one... it sucks for sure but there is always the DB9 way - maybe even wire the 2xOUT ports so you make it the "ultimate" version if I can help somehow please …

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Re: Music Quest MPU clone cards, anyone interested in them?

Posted on 2022-01-24, 17:55

by

by lemonlime

in Marvin \ Sound

in Marvin \ Sound

Hi! sorry to hear about your problems - please try the DB9 cable and if the same issues persist then please send me an email ( http://pcmidi.eu/contact.html ) so we can work this out directly :) You don't need a slow system for PCMIDI as it's not a speed-sensitive card - the ones you tried already …

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Re: Music Quest MPU clone cards, anyone interested in them?

Posted on 2022-01-24, 15:25

by

by lemonlime

in Marvin \ Sound

in Marvin \ Sound

Hi Keropi, Thanks again for putting these awesome cards together! I seem to be having some weird problems with my card and was hoping you could help. It seemed to be working perfectly the first few times I used it, but I’d occasionally get no MIDI signal being received by my SC-55ST (no red flashing …

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Re: Any hope for this damaged 3dfx Voodoo 2 (Creative CT6670 8MB)

Posted on 2020-09-01, 13:48

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

Thanks Vaudane and Justin1091! Yeah, no oscilloscope here unfortunately. If I had to guess, I'd say it was probably sitting unprotected in a box with a bunch of other stuff and got knocked about repeatedly. Reflowing might be interesting to try, but I'd have to find some way to do that (I doubt a …

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Re: Help identify this Socket 4 motherboard - Opti Premium

Posted on 2020-08-28, 13:56

by

by lemonlime

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

On a whole other note - is that battery going to leak? I was planning to remove it as soon as I get the board, but looking more closely at the pictures it seems to be a Lithium cell and not one of the usual NiCAD barrel batteries. I don't think Lithium batteries are prone to leaking like other …

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Help identify this Socket 4 motherboard - Opti Premium

Posted on 2020-08-27, 21:33

by

by lemonlime

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi All, Bought this somewhat unique board on eBay on a whim, but having trouble identifying it and finding a manual. Any ideas? It's socket 4 with Opti Premium 82C596/82C597 chipset. (including 82c822 VLB/PCI bridge)

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Re: Any hope for this damaged 3dfx Voodoo 2 (Creative CT6670 8MB)

Posted on 2020-08-27, 13:18

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

I checked and rechecked all of the legs on the component chips without any luck. I found a few other spots on the front of the card with minor trace damage where copper was exposed, but continuity checks out okay with a multimeter. I think whatever is wrong with this card isn't visible on the …

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Any hope for this damaged 3dfx Voodoo 2 (Creative CT6670 8MB)

Posted on 2020-08-22, 18:56

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

Hi All, I picked up a cheap ‘untested, as-is' CT6670 8MB Voodoo 2 on eBay from a local seller recently. I could see a few issues in the eBay listing, but the damage was more extensive when I received it and did a more thorough inspection. Top/bottom images before replacing components: https:// …

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Re: Voodoo 2 component map

Posted on 2020-08-13, 15:08

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

Is C48 (component side, lower right) also missing? Can't really make it out on the photo. The trace damage near the VGA connector should be checked with a multimeter. It looks quite severe. Yep, it is broken right off. sdz spotted it an provided the correct value for it (1nF 25V 0603). For the …

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Re: Voodoo 2 component map

Posted on 2020-08-13, 15:04

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

Hoping wrote on 2020-08-13, 14:23: Hi, C108 is on the values chart as 1nf 25v Ah, I missed that. Thanks. It is in a different location on the CT6670 compared to board layout in the original post. It is a bit further down.

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Re: Voodoo 2 component map

Posted on 2020-08-13, 13:26

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

C9 on your card is a 3.3-4.7uF, minimum 6.3V, 1206 cap. You're also missing C48 (top side, bottom right corner), this is a 1nF 25V 0603 cap. Awesome! Thanks so much sdz. Good catch on C48, I totally missed that one. Now that I'm looking more closely, I see a few more: 1. C128 is missing from the …

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Re: Voodoo 2 component map

Posted on 2020-08-12, 20:26

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

I just got a banged up Creative CT6670 Voodoo 2 on eBay. I had to straighten quite a few legs on all three chips, but all appear to be good now. There is also some trace damage it seems near the VGA connector. I fixed some of the solder damage there. From what I can see, only one surface mount …

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Re: Looking for a fast vesa local bus card for DOS gaming

Posted on 2020-02-07, 19:23

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

Well, I couldn't leave well enough alone :D I found a VLB Powergraph C33 (Western Digital WD90C33 w/1MB) for a great deal on eBay. Seems like a great card, but as others suspected earlier, I'm very CPU bottlenecked and the difference is minimal. I see only a 1 fps improvement between the two cards. …

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Re: 486 Multimedia dream build ( 1993/94 )

Posted on 2020-01-23, 21:36

by

by lemonlime

in Marvin \ System Specs

in Marvin \ System Specs

Very nice build! I've been keeping an eye out for one of those DX4-100 overdrive chips for a long time. My board only takes 5V CPUs and that has a built-in VRM for 5V-3V down-stepping, which is great.

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Re: Looking for a fast vesa local bus card for DOS gaming

Posted on 2020-01-16, 15:53

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

Thanks everyone for the information. In the end, I decided to just keep the Trident card. I found some cheap DRAM on eBay and upgraded it to 2MB successfully. https://pbs.twimg.com/media/EOP0HIuWkAE3DNc?format=jpg&name=4096x4096 https://pbs.twimg.com/media/EOP0HItXUAgFNKT?format=jpg&name=4096x4096 …

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Re: Looking for a fast vesa local bus card for DOS gaming

Posted on 2019-12-30, 20:45

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

Thanks for the info about the ET4000, SirNickity. That's good to know. I may try with the Trident card to see how it goes. I've never run it with a CPU as fast as a DX2/80 so I'm hoping the extra CPU power may help too. I found some 70ns DRAM DIP-20 ICs on eBay for a good price as well so will try …

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Re: Looking for a fast vesa local bus card for DOS gaming

Posted on 2019-12-27, 16:17

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

Not sure you will really notice much of a difference for DOS stuff with a higher end VLB card. Yeah, that's my dilemma. I don't have another VLB card to really compare it with, unfortunately. The Trident TGUI9400CXi isn't supposed to be a very good VLB card, but it is way better than the ISA cards …

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Re: Looking for a fast vesa local bus card for DOS gaming

Posted on 2019-12-27, 15:59

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

Actually, looks like I may be mistaken about the Oak Technologies OTI086 chip. It isn't a VGA core like the ones used with Weitek based cards, Seems it is a "Dot Clock Generator" .. "capable of generating up to 16 video clock frequencies and 4 memory clock frequenies" .. "used to replace multiple …

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Looking for a fast vesa local bus card for DOS gaming

Posted on 2019-12-27, 15:40

by

by lemonlime

in Marvin \ Video

in Marvin \ Video

Hi All, I'm working on a 486 build at the moment. It will be an AMD 486 DX2/80 that will be used mainly for DOS gaming. Right now, I've got a combination VGA and I/O VLB card based on the Trident 9400CXi chipset. It also has an OAK OTI086 chip on the card as well, which I assume may be for basic VGA …

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