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

Posted on 2022-12-25, 17:32

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 …

Re: GPU Suggestions?

Posted on 2022-12-20, 16:26

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.

Re: GPU Suggestions?

Posted on 2022-12-17, 21:40

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.

Re: Sound Blaster 16 Clones

Posted on 2022-12-11, 01:05

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 …

Re: Sound Blaster 16 Clones

Posted on 2022-12-10, 02:05

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 …

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

Posted on 2022-10-10, 22:39

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 …

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

Posted on 2022-10-10, 05:37

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 …

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

Posted on 2022-10-10, 02:49

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 …

Re: Sound Blaster 16 Clones

Posted on 2022-10-10, 02:39

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 …

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

Posted on 2022-10-10, 02:33

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 …

Re: Socket 7 build, which direction should I go?

Posted on 2022-09-20, 00:13

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I actually don't have any great data on that -- mostly on FSB manipulation. I should take my P55 time machine off the shelf and do some testing with multipliers.

Re: Trying to build a DOS gaming system, and I'm having a hard time with sound. Can I get some advice?

Posted on 2022-09-17, 01:24

in Marvin \ Sound

in Marvin \ Sound

I've done quite a bit of looking into all-in-one DOS machines. There are machines which cover an amazing range of performance, but they're rare unicorns indeed. https://www.vogons.org/viewtopic.php?t=53479 K6-2+ based systems can be tuned down to fast 386 speeds. PMMX based systems clock down to …

Re: Socket 7 build, which direction should I go?

Posted on 2022-09-08, 22:45

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A nice modification is two switches for FSB/multi reclocking. One toggle on JP5B to go from 50 to 66 mhz FSB (switches to 1-2 common from 3-2 common), another toggle on JP7A to switch 3-2 common to 1-2 common again. This gives you 100 mhz, 133 mhz, 175 mhz, and 233 mhz. On top of that, you get all …

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

Posted on 2022-08-26, 01:14

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I think it was from the 1.9 series on Freedos. Can't tell you for sure which game version it was.

Re: Upgrading to ATX power supply, how much 5v amperage will I need?

Posted on 2022-08-24, 02:17

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I made this post in the "AMD K6 3DMARK, aiming for stars" thread about my Super 7 system - when overclocking one and using a GeForce 3 Ti200, my five volt line began to falter. My Epox board is one of a very small number of Super 7 motherboards that has hardware monitoring sensors that allow you to …

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

Posted on 2022-08-24, 01:29

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

CTMOUSE is great, but I ran into problems loading Overlord with it. https://www.mobygames.com/game/overlord-

Re: Retro OSes for retro computers

Posted on 2022-08-23, 00:11

in Marvin \ Software

in Marvin \ Software

I think it's a shame a mega corp like Microsoft can't actually finish porting their Windows control panel functionality over to the new UI after 10 years.

Re: SB Live! not working in FreeDOS

Posted on 2022-08-23, 00:08

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

SB Live and earlier Audigy cards use EMM386 port trapping to emulate the ISA sound blaster interface. FreeDOS EMM386 and JEMM don't use the same interface as the versions from MS-DOS and PC-DOS (DR-DOS compatibility unknown). MPXPlay supports SB Live hardware natively. If that works, try using a …

Re: SB Live! not working in FreeDOS

Posted on 2022-08-22, 02:36

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

SB Live and earlier Audigy cards use EMM386 port trapping to emulate the ISA sound blaster interface. FreeDOS EMM386 and JEMM don't use the same interface as the versions from MS-DOS and PC-DOS (DR-DOS compatibility unknown). MPXPlay supports SB Live hardware natively. If that works, try using a …

Re: Capacitor replacement rules?

Posted on 2022-08-22, 01:41

in Milliways

in Milliways

I already explained it can throw off a control loop, like a switching power supply regulator feedback loop. Some switching power supply chips have a limit how large (or small) a capacitance you can put at the regulator output or the output voltage won´t be stable, it could start to oscillate or …

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