Re: I've got the OPL3 synth from a CMI8738 working in Windows 7 x64

Posted on 2014-08-27, 19:03

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by socram8888

in Marvin \ Sound

in Marvin \ Sound

Sorry for bumping this but I want to clarify something: The file on the first post does NOT have virus. Google Drive reports that is infected because I'm using a programming language often used by script kiddies to make keyloggers and the like. I would like to upload the original source code so you …

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Re: Anyone ever considered a liquid-cooled retro box?

Posted on 2013-09-18, 19:59

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by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I don't see the point of this project. This stuff will be unstable way before it reaches a critical temperature, mostly due to slow peripherals and bit-skewing.

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Re: I've got the OPL3 synth from a CMI8738 working in Windows 7 x64

Posted on 2013-09-15, 09:33

by

by socram8888

in Marvin \ Sound

in Marvin \ Sound

This is my board: http://www.pccomponentes.com/gigabyte_ga_h61m … s2pv_2xpci.html

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Re: So what's the deal with MIDI devices?

Posted on 2013-09-11, 21:49

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by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As a side note, the reason the Amiga could play .MOD more effectively than PCs is that its APU chip, the so-called Paula, could fetch samples directly from main memory (having virtually no speed penalty), and each of the four different PCM units can have a different sampling frequency, to increase …

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Re: HDMI cable audio issue

Posted on 2013-09-11, 12:23

by

by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

HDMI cables use the same wires for audio and video, so it has to be a configuration issue.

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Re: Old CD-ROM Drives

Posted on 2013-09-11, 12:21

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by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Why don't you get a standard DVD burner? They're cheap and totally compatible. IMHO when it comes to storage, using old hardware isn't the way to go.

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Re: How many Retro PCs do you got in your house?

Posted on 2013-09-10, 06:11

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by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I only have a single retro PC matching the description in the first post: a Dell Latitude laptop with an Intel Pentium 3 (Coppermine) at ~800MHz, 256MB DDR RAM, 10GB HDD IDE, with floppy disk drive and parallel and serial ports. Surprisingly for a 12-year-old laptop, its battery still charges and …

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Re: A query to those with Amigas

Posted on 2013-09-09, 19:50

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by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If the A1200 is too expensive, you may try looking for a A600 instead, which last time I looked at eBay were cheaper.

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Re: Isn't the last sentence on this page incorrect?

Posted on 2013-08-26, 21:06

by

by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

F2bnp wrote: At least you can use your daughterboard in Win7 x86 😀. If it doesn't even anything but the basic audio subsystem, I doubt it will support the embedded MPU401 port.

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Re: Keyboard not detected on AT board

Posted on 2013-08-21, 18:37

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by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Have you tried measuring the voltage in the AT socket?

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Re: Found a desktop style Baby AT case, future P1 build

Posted on 2013-08-17, 08:33

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by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Does that keyboard have mechanical keys and a XT/AT switch on the back? I've got it one a month ago that looks exactly like that except for the brand sticker: http://i.imgur.com/j6G4Eew.jpg I've got it new in box (yes, a twenty-years-old keyboard still NIB, I don't know where they guys who sold it …

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Re: Today's haul :D

Posted on 2013-08-16, 14:06

by

by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hydrogen peroxide does a good job at decoloring those brownish plastics from the 5 1/4 floppy drives. About the leaky battery, isopropylic alcohol evaporates faster than others and don't leave any kind of residue, so it is usually used in cameras to clean the CCDs, but here any kind of alcohol …

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Re: Yamaha OPL3SA, NEC XR385 and Roland MT-32 co-existance?? (NEC XR385 apparently dead)

Posted on 2013-08-16, 13:53

by

by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

AFAIK that NEC boards is a XG synthesizer, so if you want a MIDI synthesizer that sounds exactly like that, why don't you use a software emulated one? The S-YXG50 for example (a software XG MIDI synthesizer) sounds very nice. If you want a hardware one, I'll recommend you getting a sound card from …

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Re: Yamaha OPL3SA, NEC XR385 and Roland MT-32 co-existance??

Posted on 2013-08-15, 08:59

by

by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

RESET is not +RESET but /RESET. It's an active-low input. In these inputs, 0V is a logical one and VCC (5V for this case) is a logical zero. Therefore when it's at 5V it's not being resetted. The MIDI is an UART, and those inputs are high when the bus is idle. The UART pulls the wire to GND when it …

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Re: Can anyone explain how to dump floppy card bios rom

Posted on 2013-08-11, 21:12

by

by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If the said ROM is inside the floppy unit, he's not going to be able to dump it without using a Willem reader or something like that. That ROM stores the program that the CPU inside the disk drive (the Commodore 1541 for example uses a 6502, and Iomega ZIP drives use 8051-based ASICs) uses to parse …

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Re: I've got the OPL3 synth from a CMI8738 working in Windows 7 x64

Posted on 2013-08-11, 20:59

by

by socram8888

in Marvin \ Sound

in Marvin \ Sound

I'll get you the latest version tomorrow, 8.17.40

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Re: Sound card.. overheating?

Posted on 2013-08-10, 21:14

by

by socram8888

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

When something that shouldn't get hots overheats, the culprit is usually the VCC rail. Try measuring the voltage in the +5V rail coming from the power supply. If the PSU is old, replacing the caps inside it will reduce the ripple. DC components can do nasty things when they have to deal with the AC …

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Re: I've got the OPL3 synth from a CMI8738 working in Windows 7 x64

Posted on 2013-08-10, 20:57

by

by socram8888

in Marvin \ Sound

in Marvin \ Sound

Well, try this: Poke "00" to C01A. Peek "388". Should return "FF" (open bus, as OPL3 is not enabled) Poke "08" to C01A. Peek "388". Should return 00. Neither AutoIt nor my program do not rely on any obscure feature or hidden Windows call, so it should work under any Windows (from 2000 onwards, it …

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Re: I've got the OPL3 synth from a CMI8738 working in Windows 7 x64

Posted on 2013-08-10, 07:59

by

by socram8888

in Marvin \ Sound

in Marvin \ Sound

I installed cmi-8738 in my main PC and did what you means, but I found errors. My card is 8738-sx, and tried it with installed and uninstalled "porttalk". Nothing different. Run Peekpoke as Admin. See attached pic if I mistake something. Or I have a 8738 that didnt have OPL? Did you use address …

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Re: I've got the OPL3 synth from a CMI8738 working in Windows 7 x64

Posted on 2013-08-03, 07:41

by

by socram8888

in Marvin \ Sound

in Marvin \ Sound

Well, there's no forum dedicated to hardware, and as I've got it running in Windows, this was the forums that IMHO matched the contents better. But well, you've a mod, feel free to move it anywhere if you think this is not the right place. Well, here's how to get the CMI's OPL3 synth working: Grab …

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