Re: Looking for IBM Music Feature Card owners

Posted on 2024-04-15, 15:23

by

by rkurbatov

in Marvin \ Sound

in Marvin \ Sound

florian3 wrote on 2024-04-13, 01:09: I'm almost done with my build Thanks a lot @SCG for sharing the project! Cool, cool. I am still waiting for the tester as I'm using mostly components from AliExpress. The logic chips are all good but I need to check more complex ones and especially memory.

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-04-15, 15:21

by

by rkurbatov

in Marvin \ Sound

in Marvin \ Sound

florian3 wrote on 2024-04-14, 13:01: dionb wrote on 2024-04-14, 11:53: Maybe I'm a bit slow, but has the design been finalized/known-good? I don't know if the current design is final. It is. Scg's goal was to make the exact replica - that's it. As exact as possbile.

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-03-21, 09:26

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by rkurbatov

in Marvin \ Sound

in Marvin \ Sound

PicoGUS is an interesting project, but everybody defines the level of emulation he wants. On one hand, having the real THING, technically the exactly same thing as it was back then, and more of that, created by yourself from scratch (or at least soldered) - is a neat part of the new experience. An …

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Re: Oak Technology VGA-16 (OTI-037C based mda/cga/ega/vga) video card schematics?

Posted on 2024-03-20, 17:35

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by rkurbatov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you. Will try.

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Re: Oak Technology VGA-16 (OTI-037C based mda/cga/ega/vga) video card schematics?

Posted on 2024-03-20, 13:35

by

by rkurbatov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Unfortunately I can't help you. The dead PAL replacement was my guesswork based on observed traces, and can't be taken as the true answer without validating it first. And the other MMI-branded PAL16L8 seems not readable in my T48 XGecu. I can't tell if it's dead, or it can't be directly read as is …

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Re: Oak Technology VGA-16 (OTI-037C based mda/cga/ega/vga) video card schematics?

Posted on 2024-03-19, 19:25

by

by rkurbatov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

PS: I know the card is garbage, it has only 8-bit data path to the video memory. I'm just kinda enjoying diving deeper in old hw, brings up memories :) Hi. I've found this beauty on Violity and bought it just because of this topic. It's exactly your card model (there are few of them) but in worse …

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Re: Orpheus II soundcard thread *** LT board now available ***

Posted on 2024-03-19, 08:04

by

by rkurbatov

in Marvin \ Sound

in Marvin \ Sound

Is there a foolproof DOS game you folks use for testing your GUS sound configuration? By "foolproof", I mean it works out of the box without any patching, manual configuration, etc. You just enter the game's SETUP program, pick "Gravis Ultrasound", and go. Thanks. Impulse Tracker is an excellent …

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Re: Tube Time: Announcing The Snark Barker, a 100% Compatible SB 1.0 Replica!

Posted on 2024-03-14, 11:14

by

by rkurbatov

in Marvin \ Sound

in Marvin \ Sound

Lol, sorry, I'm buying components on AliExpress, they have magical attachment to number 5 😀 So I got all components to build 5 boards and already found friends for remaining ones.

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-03-12, 00:27

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by rkurbatov

in Marvin \ Sound

in Marvin \ Sound

florian3 wrote on 2024-03-12, 00:02: I ordered the YM2164 from a supplier in China that has sold me some authentic Yamaha chips before. Fingers crossed… The same thing. Lake Store or something like that. But that was YM3812 with strange label on them, though perfectly working.

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-03-11, 22:55

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by rkurbatov

in Marvin \ Sound

in Marvin \ Sound

I will order most of the standard parts from Mouser and they have 720 Ohm resistors. The Kemet 40uH coil is backorderd there with ETA June. Not sure if I will wait or maybe just use the 60uH part. I ordered most of the NOS parts from utsource and some on ebay. Mouser is not only expensive, but …

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Re: Tube Time: Announcing The Snark Barker, a 100% Compatible SB 1.0 Replica!

Posted on 2024-03-11, 21:37

by

by rkurbatov

in Marvin \ Sound

in Marvin \ Sound

I thought about making it green but eventually went black, Audigy like. Not really happy with plastic backplate but it's better than nothing. Will see how it looks assembled.

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-03-11, 21:25

by

by rkurbatov

in Marvin \ Sound

in Marvin \ Sound

I also ordered parts to build this. Only 11.8MHz crystal I found was on ebay but it’s a different package. Unless I find an alternative I will probably change the footprint before ordering PCBs. Tronix claims it works without problems with 12MHz. He was quite deliberate with this board :) Replaced …

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Re: ISA I/O Interface

Posted on 2024-03-10, 02:16

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by rkurbatov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've just bought early ISA 486 Motherboard and 486 DX-50 and was searching for a proper Multi I/O card for it. I have two 2.88 floppy drives and was thinking about putting one of that drives into this build. One is PS/2 style and requires special power through the data cable and seems like this …

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-03-10, 01:21

by

by rkurbatov

in Marvin \ Sound

in Marvin \ Sound

Boards and most of the components have arrived. I'm still waiting for Chip Tester from Back Bit to test the complex chips like CPUs and memory, but logic ICs seems ok - earlier I had problems even with them. So spent whole evening on testing everything with my TL48 :) Will try OpApm mod (4556 with …

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Re: Orpheus II soundcard thread *** LT board now available ***

Posted on 2024-03-05, 23:42

by

by rkurbatov

in Marvin \ Sound

in Marvin \ Sound

Btw, it works REALLY well playing tracker music on 386DX, even the most complex one.

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Soyo SY-020C memory connector

Posted on 2024-03-01, 10:54

by

by rkurbatov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've bought this board recently. I suppose it's Soyo SY-020C, it looks just so, will tell definitely when it arrives. I have a question about proprietary memory connector - have somebody seen such expansion boards? Is it something like SIMM30 to SIMM72 with 8-16 additional simm sockets on it or some …

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Re: Bought these (retro) hardware today

Posted on 2024-02-26, 07:51

by

by rkurbatov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have an old CAD system, has Asus ISA-486 motherboard and Diamond Stealth VRAM ISA, it only had a DX33, but I am thinking of putting my DX50 in it. That's so interesting. Like for 1992 such a system was not a bleeding edge, but pretty top. But if I bought DX2-66 VLB a year later it would have …

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Re: Tube Time: Announcing The Snark Barker, a 100% Compatible SB 1.0 Replica!

Posted on 2024-02-25, 22:39

by

by rkurbatov

in Marvin \ Sound

in Marvin \ Sound

I have a firmware question. It seems like the latest one for SB1 was DSP 2.00 adding some specific DMA modes, while SB2 had DPS 2.01+ allowing additional sample rates (up to 44.1 kHz mono if memory serves, even more on BlasterBoard clone). On the other hand, SB2.0 has almost the same schematics and …

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Re: Bought these (retro) hardware today

Posted on 2024-02-25, 22:07

by

by rkurbatov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I don't know why, but I bought that strange 486 early board with ISA ports only. Soyo SY 020C. And 486 DX-50 in pair to it. Typical 486 is DX2-66 with VLB - that is quite interesting per se, but it's PC of year 1994, that transition between Win3.11 and Win95. But finding something of the early high …

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Re: Bought these (retro) hardware today

Posted on 2024-02-22, 18:28

by

by rkurbatov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

much as is the intention of the DOSbox main fork, for similar reasons. I think that reason is self defense... I always treated DOSBox as something for retrogaming, that's the cheapest way to do so. And seems like GoG now uses it officially as a DOS container for games they bought - that's ok. But, …

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