Re: Possibly crazy idea : using a Raspberry with Jack and something like JackMix to have "create" a software S/PDIF mixe

Posted on 2021-02-19, 08:22

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

In the amateur radio VHF/UHF repeater community, the Pi 4 is known to have issues with multiple C-Media dongles connected via USB. Pi 3 has no such problems beyond previously known raw performance limits.

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Re: HardMPU, anyone?

Posted on 2021-01-30, 08:54

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

For MIDI synths, it would require an audio circuit, but that's about it. Ideally, it would be available in a nice handy form factor that plugs into a standard pin header. Ideally, most sound card models would have this standard pin header.

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Re: New PS/2 compatible mouse options?

Posted on 2021-01-30, 08:48

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a full size Kensington Pro Fit. It's PS/2 compatible via an adapter.

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Re: Sound Blaster 16 Bugs and Deficiencies Summary

Posted on 2021-01-17, 04:12

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

Well, darn. It looks like Creative's bad habits started before the Sound Blaster 16. :| I found that the upper half of the quad amp at U11 on a CT1600 Sound Blaster Pro 2 was floating too. https://www.vogons.org/download/file.php?mode=view&id=100390 It's hard to tell but pins 8-10 and 12-14 are …

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Re: Any opration system which runs on an i860 CPU in a 486 system?

Posted on 2021-01-09, 04:23

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Does the x86 CPU transfer control to the i860 then halt until control is handed back?

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Re: Differences between CMI8330A, CMI8330C, and HT1869V?

Posted on 2021-01-08, 15:09

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

Well, as far as I know its SPDIF In/Out is 5V and not directly compatible with most audio gear, no? It does not matter. Both TTL and COAX are full-fledged proper S/PDIF. They differ in signal amplitude only. If you have TTL (2-3+ V, often 4-5V) and need COAX you can just use this: https://i.ebayimg …

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Re: MT-32 wavetable daughterboard exist

Posted on 2021-01-05, 03:44

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

... a DIY waveblaster daughterboard which seeems to be fully compatible with MT-32 ... See: http://members.home.nl/c.kersten/ It says "And just today two more, very special new boards arrived from the same source: LAPC on a MIDI daughterboard! It must have been especially difficult sourcing those …

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Re: MT-32 wavetable daughterboard exist

Posted on 2020-12-31, 06:08

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

Well, I have checked again the video and he is using SoftMPU. Makes sense since Legend of Kyrandia doesn't work with UART mode. Nice to see it works great with 386 SX25. Is MT-32 emulation on GM cards capable of producing proper sound effects? Not completely, although it can be okay when titles …

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Re: MT-32 wavetable daughterboard exist

Posted on 2020-12-30, 19:31

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

Yeah, this could be the same thing. I know for sure it's just plain ISA sound card with MIDI daughterboard only but I have no idea how it looks like or how it works. I just know (thanks to the video) that compatibility is great and that it sounds excellent. Wish I knew more about this product! I'm …

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Re: "DOS Subsystem for Linux"?

Posted on 2020-12-30, 19:27

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by gdjacobs

in Milliways

in Milliways

If memory servers, Linux from the distant past also had the ability (1990s? linload? loadlin?). LOADLIN. Very useful for those with sound cards that needed initialization by some DOS-only utility. LOADLIN works to this day. Reclocking a C3 CPU via SETMUL also persists into the Linux session if you …

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Re: Custom build ARM machine...

Posted on 2020-12-28, 21:32

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by gdjacobs

in Milliways

in Milliways

BSD support looks good: FreeBSD requires an appropriate bootloader[1] layered into the generic ARMv7 flash image[2]. [1] https://wiki.freebsd.org/arm/Allwinner/booting [2] https://download.freebsd.org/ftp/releases/arm/armv7/ISO-IMAGES/12.2/FreeBSD-12.2-RELEASE-arm-armv7-GENERICSD.img.xz OpenBSD …

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Re: Do I need a crosslink UTP cable to connect my IP camera directly to the computer?

Posted on 2020-12-28, 21:31

by

by gdjacobs

in Milliways

in Milliways

Correct me if wrong, but I seem to remember it being part of the spec, but optional to implement . Though, AFAICR, practically everything NIC ASIC vendor ended up implementing it . You're correct, although 1000baseT requires a full transceiver on each pin so I can't see any cost savings in …

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Re: Rarest CPUs?

Posted on 2020-12-27, 22:36

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Quick question... Do exotics like vector supercomputer processors or space rated CPUs count?

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Re: Custom build ARM machine...

Posted on 2020-12-27, 22:02

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by gdjacobs

in Milliways

in Milliways

Looking at riscosopen.org, it doesn't seem to be possible. Which is a bit of a shame.

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Re: MT-32 wavetable daughterboard exist

Posted on 2020-12-27, 21:44

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

Kyrandia doesn't use much in the way of custom instruments. SoftMPU and a Roland compatible wavetable card with MT-32 emulation will sound decently close to the real thing. Not saying that's what's going on as I'm not as knowledgeable as Hierophant or NewRisingSun, but Kyrandia isn't the high bar …

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Re: Custom build ARM machine...

Posted on 2020-12-27, 21:16

by

by gdjacobs

in Milliways

in Milliways

Does the Orange Pi have a RiscOS port available?

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Re: Do I need a crosslink UTP cable to connect my IP camera directly to the computer?

Posted on 2020-12-27, 21:14

by

by gdjacobs

in Milliways

in Milliways

For future reference, most modern network cards have a feature called auto MDI-X which negotiates physical link by switching rx and tx pins as necessary. It's only required on one side of a two way link to function. Indeed, practically all Gigabit and faster cards have auto MDI-X , so even cards …

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Re: Windows NT Build

Posted on 2020-12-25, 22:41

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a dual slot P3 build with 1gb of ram which I've used for NT 3.51, NT 4, and Solaris x86. I remember using NT on severely overtaxed systems at the time, and I enjoy the contrast provided by a system with specifications so ridiculous it would have seemed out of a sci fi movie at the time.

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Re: Do I need a crosslink UTP cable to connect my IP camera directly to the computer?

Posted on 2020-12-25, 22:33

by

by gdjacobs

in Milliways

in Milliways

For future reference, most modern network cards have a feature called auto MDI-X which negotiates physical link by switching rx and tx pins as necessary. It's only required on one side of a two way link to function.

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Re: Advice about retro speakers

Posted on 2020-12-24, 02:20

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

Even in my very small city, the local scrap shops have no shortage of old small-bookshelf speakers (15 to 25cm high) from fair quality Japanese brands like Sony, Panasonic, Akai, Sanyo et al which are perfectly retro (from the same eras as our computers) and are sonically far superior to 99% of the …

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