Re: Your game suggestions for an OPL2/OPL3 test suite?

Posted on 2019-04-01, 14:41

by

by root42

in Marvin \ Sound

in Marvin \ Sound

Why not both? IIRC the MODs in Pinball Fantasies were a bit more polished, but my memory might betray me. Haven't played Dreams in a long time. Fantasies was always my favorite. It indeed used the discrete volume levels of the Adlib channels to make some crude pulse code modulation, IIRC. It's a …

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Re: very slow drawing with DJGPP

Posted on 2019-04-01, 14:28

by

by root42

in DOSBox Development

in DOSBox Development

If you give me a binary, I can test it on my 386 with an ET4000 on ISA bus. That should probably take longer than 1ms...

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

Posted on 2019-04-01, 14:14

by

by root42

in Marvin \ Sound

in Marvin \ Sound

Dubinius wrote: Damn 😁 I had a lot of empty and unsoldered "other" Projects like the Micro8088 from Sergey and now that Sound Card Clone, ... Where did you get the Micro8088 PCB? I do have a couple of V20s and Faraday ICs, but wouldn't want to order 10 PCBs again.

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Re: Your game suggestions for an OPL2/OPL3 test suite?

Posted on 2019-04-01, 13:02

by

by root42

in Marvin \ Sound

in Marvin \ Sound

Tyrian has great FM sound. You can use the setup program's built in Jukebox to do tests. Also Adlib Tracker II and Reality Tracker come with demo tunes you can use to test.

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Re: very slow drawing with DJGPP

Posted on 2019-03-30, 22:30

by

by root42

in DOSBox Development

in DOSBox Development

First, I think you should add edx to the clobber list ofmthe asm part. Second, instead of &backBuffer[0], simply backBuffer should be enough. Second, did you try to fill edx with a static value, e.g. 0xffffffff to see if it sets four pixels? Start by making your code simpler, then adding …

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Re: How does this ATX to AT adapter work?

Posted on 2019-03-30, 17:07

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

oeuvre wrote: you can find them on ebay that also come with power switches What? The smart one? Never seen it. Only the passive converters

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Re: How does this ATX to AT adapter work?

Posted on 2019-03-29, 11:55

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The PSU is not the only problem. Tantalum caps can fail short, and will fry traces and ICs. This device will prevent that by triggering its fuses.

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Re: How does this ATX to AT adapter work?

Posted on 2019-03-28, 23:09

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I do personally use that model, more expensive, but more convenient (it includes a power switch) and more secure (no risk to fry a 486 inserted in the wrong way). https://x86.fr/atx2at-smart-converter/ What? Is this available now? I wanted one already a year ago! :) I once emailed the author, and …

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

Posted on 2019-03-28, 15:16

by

by root42

in Marvin \ Sound

in Marvin \ Sound

Almost the right one: http://www.bracket.com/downloads/brackets/pdf/93590001B.pdf But yeah, there are a couple of companies that could make the exact bracket. Cost will probably in the order of 10 EUR per bracket for a small batch (you probably won't find any company doing batches less than 100).

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

Posted on 2019-03-28, 14:07

by

by root42

in Marvin \ Sound

in Marvin \ Sound

Yes that one will fit. I took one with a conical head, but the flat head should be fine. Concerning the bracket: We really need someone to make some professionally, I think... I tried to mod a Keystone bracket, but the DB15 and the volume wheel hole are really a pain... Maybe for the meantime I will …

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

Posted on 2019-03-28, 10:09

by

by root42

in Marvin \ Sound

in Marvin \ Sound

https://www.microscrews-shop.nl/

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

Posted on 2019-03-27, 21:17

by

by root42

in Marvin \ Sound

in Marvin \ Sound

They look good! I think the extra ridges are a good idea. I have the standard STL, and it is quite slippery.

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Re: Old KEnitec 286 Plus (suntac) Rescue, will need help.

Posted on 2019-03-27, 19:24

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Do you have a CMOS battery attached? If not, you will always get these errors. Do you have any alternative FDC?

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Re: Old KEnitec 286 Plus (suntac) Rescue, will need help.

Posted on 2019-03-27, 18:55

by

by root42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Wow, this was an impressive rollercoaster of a thread. Happy it worked out in the end! I also have one or two wonky 286 boards, which I want to fix at some point in the future. This gives me a little hope that it will actually be possible.

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Re: very slow drawing with DJGPP

Posted on 2019-03-26, 20:36

by

by root42

in DOSBox Development

in DOSBox Development

Untested, but this is a more generic Makefile. Note that it will compile too often, since the source files depend on ALL header files. But you can add a bit more to compute all header dependencies automatically. I leave that up for practice. If you want to add a new source file, just add it to the …

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Re: very slow drawing with DJGPP

Posted on 2019-03-26, 17:20

by

by root42

in DOSBox Development

in DOSBox Development

For that djgpp has movdatal, which does 32 bit transfers: http://www.delorie.com/djgpp/doc/libc/libc_585.html Beware this is not portable, and restricted to djgpp.

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2019-03-26, 16:38

by

by root42

in Marvin \ Sound

in Marvin \ Sound

Sure, sourcing parts is no problem! PCB plus Interwave is fine.

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

Posted on 2019-03-26, 16:37

by

by root42

in Marvin \ Sound

in Marvin \ Sound

You also need the Yamaha DAC. Or else there is no FM sound...

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Re: very slow drawing with DJGPP

Posted on 2019-03-26, 16:36

by

by root42

in DOSBox Development

in DOSBox Development

Try replacing -Os with -O3. The first optimizes for code size, the latter more for speed. Also you need to put that in every compile target. During linking where you are using it, it's worthless. Also get some documentation on make. You should use generic targets, so you can easily add and compile …

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2019-03-26, 14:27

by

by root42

in Marvin \ Sound

in Marvin \ Sound

Same here. Would love a kit, since I like soldering, if possible.

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