Re: Cheap Sound Card for DOS --- ALS4000 PCI

Posted on 2023-05-17, 03:25

by

by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

yep, which is such a shame as would be awesome card otherwise. Honestly, I would _love_ if those cards had a full HW XG synth onboard. Still wonderful devices, though. I guess the wording wasn't overly clear, how about "True OPL for Dos and that XG Midi chip basically gives you a MU-10 external …

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Re: Cheap Sound Card for DOS --- ALS4000 PCI

Posted on 2023-05-11, 00:02

by

by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

chinny22 wrote on 2023-05-09, 12:40: that XG Midi chip basically gives you a MU-10 external Midi module The Yamaha MIDI support on these cards requires Windows.

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Re: PC/PCI or SB-LINK cable. How to make?

Posted on 2023-04-15, 21:00

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The CT4810 doesn't support either sideband option for DOS audio emulation. The driver uses EMM386 to intercept hardware calls and route them to the card. Ironically, Creative Labs only produced one family of cards which support SBLink -- AWE64 PCI or AWE64D sounds cards.

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Re: where to find AT power connector? I need to convert ATX to AT

Posted on 2023-04-15, 20:48

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Inverting regulators are also very common and work nicely, although you need to take a bit more care in filtering.

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Re: Which is the best and most memory efficient CD-driver?

Posted on 2023-04-15, 20:45

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

For CD audio usually you need the cable directly from DVD to sound card. At least is waht i use in older systems. It depends on CD player program. In late 90's I had used a player that works via IDE interface and doesn't requite analog cable between drive and sound card even under DOS. BTW it's a …

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Re: Crystal CS9233 Wavetable synthesizer experiments

Posted on 2023-03-30, 02:24

by

by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

Build this "latest latest & final" rev C. I really hope it will be the final revision. This time I used SAM8905-1 because it looks badass and I need to verify it's functionality. According to Dream datasheet it should be the second revision issue, 64MHz. Same as Crystal CS8905A, but in different …

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Re: Can Munt act as a standalone MT-32 emulator for external midi sources?

Posted on 2023-03-19, 23:19

by

by gdjacobs

in MT-32 General

in MT-32 General

I'm not a Mac user, but this (or something similar) will be what you need. https://github.com/notahat/midi_patchbay

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Re: Recapping motherboards - no non-low-ESR caps existing (anymore?)

Posted on 2023-03-14, 12:02

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The range of viable cap esr value depends on the design of the regulator feedback loop and the response characteristics of the regulator itself. https://www.ti.com/lit/an/slva115a/slva115a.pdf https://www.vogons.org/viewtopic.php?p=1147493#p1147493 https://www.vogons.org/download/file.php?id=159502 …

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Re: Recapping motherboards - no non-low-ESR caps existing (anymore?)

Posted on 2023-03-14, 01:34

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The range of viable cap esr value depends on the design of the regulator feedback loop and the response characteristics of the regulator itself. https://www.ti.com/lit/an/slva115a/slva115a.pdf High current pwm regulators will require ultra low esr caps (realistically polymers these days as ultra low …

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Re: Any love for AM2?

Posted on 2023-02-27, 01:30

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The worst thing about AMD chipsets for AM2, I think it was the south bridge, the SATA interface always seemed slower to me than Intel chipsets, making the whole system seem slower, at the time the only solution I found was to use RAID 0 until SSDs became common and "affordable". But it didn't …

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Re: SATA HARD Disk in 286/386 Mobo: Is it possible?

Posted on 2022-12-25, 17:32

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I succeed to make a simple IOCS16# decoder using 2 log. gates IOs 7432 and 7403 (simple grounding of IOCS16# is no go as only data register requires 16-bit access and other regs. needs 8-bit). Now the SSD is identified properly and works fine on that ancient 386 with XTIDE BIOS. I plan to make …

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Re: GPU Suggestions?

Posted on 2022-12-20, 16:26

by

by gdjacobs

in Marvin \ Video

in Marvin \ Video

Alistar1776 wrote on 2022-12-18, 02:20: Is that a rare feature? It's not common. I've found the odd mATX board with a 12V connector as well. Some of the dual S462 machines had one CPU on 12V and one on the ATX connector.

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Re: GPU Suggestions?

Posted on 2022-12-17, 21:40

by

by gdjacobs

in Marvin \ Video

in Marvin \ Video

Alistar1776 wrote on 2022-05-06, 18:43: I have another psu thats a 420W unit, I can swap out when I get time. Should be fine. Even better if it's ATX 12V compliant as this is one of a handful of Socket 462 boards supplying CPU VID from the aux connector.

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Re: Sound Blaster 16 Clones

Posted on 2022-12-11, 01:05

by

by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

Unpowering a chip never works, it will then start powering itself up through all the other connected pins and this will lead to excess distortion etc. You really do need to remove a chip or utilize some actual disable feature when present. Even worse, I bet the behaviour is quite difficult to …

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Re: Sound Blaster 16 Clones

Posted on 2022-12-10, 02:05

by

by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

This card has few issues : * no way to bypass the speaker amp so it will be too loud and also quite noisy because of it * no proper voltage regulator for analog side, only a zener based shunt so expect digital noises etc. in the output. There is a spot for a 7805 and this can fix at least this …

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Re: RetroNAS - open source server software for your retro machines

Posted on 2022-10-10, 22:39

by

by gdjacobs

in Release Announcements

in Release Announcements

Yep, everything works fine with VLANs. I've had a "retro zone" as elvis explains for many years now, historically with a physical Windows Server 2003 R2 machine hosting everything, and now virtual on a TrueNAS SCALE host. I've been kicking the tires though on RetroNAS, and EtherDFS is definitely …

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Re: Pentium 200 MMX vs Pentium III 500 MHz - Any reason to NOT use the faster hardware?

Posted on 2022-10-10, 05:37

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oh, I just realized that it's an overdrive. Not sure about all the test registers in that case. Clueless1 has (or had) a P55 based POD. Full TR12 register support. I think we tried to say the same thing but you misinterpreted me. Definitely possible. In general, I've found PMMX CPUs to be capable …

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Re: Pentium 200 MMX vs Pentium III 500 MHz - Any reason to NOT use the faster hardware?

Posted on 2022-10-10, 02:49

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Early games aren’t throttled but pentoum 200 is probably already too fast for those. There is a lot that a p3 500 can do. Not much that a 200 can do that it can’t (other than being cooler. ;) Disagree. Katmai has a massive performance gap when disabling caches. Games like Commanche and U7 really …

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Re: Sound Blaster 16 Clones

Posted on 2022-10-10, 02:39

by

by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

This card has few issues : * no way to bypass the speaker amp so it will be too loud and also quite noisy because of it * no proper voltage regulator for analog side, only a zener based shunt so expect digital noises etc. in the output. There is a spot for a 7805 and this can fix at least this …

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Re: RetroNAS - open source server software for your retro machines

Posted on 2022-10-10, 02:33

by

by gdjacobs

in Release Announcements

in Release Announcements

D'oh! I mean, asking for a friend : what does managing old computers inside modern networks involve? Future plans are to use RetroNAS as a firewall of sorts. The current idea is: RetroNAS will run dnsmasq (small DNS/DHCP tool) on the device itself, to configure all IP level stuff into a separate …

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