Re: Germicidial UV-C lamp for Retrobright

Posted on Today, 06:48

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I bought a cheap 6W germicidal lamp from china (which arrived in 1 week somehow lol) and it surely produces a lot of ozone. I have used it for its intended purpose only so far but I might try it in a box with a piss colored Dreamcast shell (taht changed color hidden away in a closet) to see what …

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Re: What soundsolutions (speakers/soundbars etc.) are you using on your machines?

Posted on Yesterday, 14:02

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

http://www.tmeeco.eu/BitShit/PCschit/BattleStation.jpg (seems vogons won't let non-HTTPS sources to be used for images, and I will not be wasting my server CPU cycles on that) I have an EQ, small amp and pair of small speakers (compared to what's in the livingroom) for computer use. Speakers in the …

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Re: Help - FM music played at slow speed on DOS games.

Posted on 2020-02-19, 03:56

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

The sound issues are likely due to conflict between what is set by BIOS and what other programs want to set. I had some headache with my Toshiba laptop also and it took some fiddling to finally get sound. As far as slowdown goes, it most probably is due to 60Hz operation of the LCD. There definitely …

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Re: Sticker relocation without damaging it.

Posted on 2020-02-19, 03:13

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You set that heatgun to 100, maximize airflow, put your finger on the sticker and move the gun to a distance where you'll have hard time keeping your finger in place. Now you will not damage the plastics and sticker and can start sliding razor knife under one corner to peel the sticker up.

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Re: Sticker relocation without damaging it.

Posted on 2020-02-18, 16:43

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The heatgun is an industrial paint removal thing with only 350 and 600ºC settings, which is why I said "healthy distance". I don't use any nozzle on it as it would make a heat laser which I don't. Heat cannot be much above 60 or you risk damaging any plastics etc.

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Re: Sticker relocation without damaging it.

Posted on 2020-02-18, 15:39

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I use a heatgun at a healthy distance that I know won't melt any plastic or brown/char paper and then use a razor knife to lift the sticker up, sometimes adding more heat.

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Re: Need help with broken AWE64 Gold CT4540

Posted on 2020-02-16, 05:36

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

It looks like there's solt of what looks like moisture damage on the board, this will have to be thoroughly cleaned off. it also is most likely under some of the chips too and will have to be cleaned off there aswell.

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Re: Any ISA sound card sound as good as the Gravis Ultrasound ?

Posted on 2020-02-16, 04:28

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

IC376, IC404, IC405/EMU8000 ARE IDENTICAL CHIPS. IC376 is fabbed by AMI, IC404 is fabbed by OKI. IC405 has creative branding. They are the same chip!. EMU8000 is definitely not same as IC404, the pinouts are very different and some functionality is also different. IC404 has native 68K CPU interface …

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Re: Intel AN430TX motherboard with two Yamaha IC YMF 719-S and YMF704 on board.

Posted on 2020-02-16, 04:12

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OPL4-ML, not just OPL4. It is a single chip General MIDI synth for music over MPU401 without need for a WB card or some external MIDI module like SC55.

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Re: MCA Adlib card -- just need pictures

Posted on 2020-02-13, 03:17

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

That card looks really nice ~

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Re: Need help with broken AWE64 Gold CT4540

Posted on 2020-02-12, 20:49

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

Capacitance is 10µF or higher (higher is better), voltage is 16V or higher.

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Re: Testing of SRAM cache chips

Posted on 2020-02-11, 16:12

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

FPGA based memory tester is in my todo list, but that list is fairly big and I lack money for the time being. SRAM and SIMM testing are the primary goals.

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Re: Memtest86+: does it also test cache memory?

Posted on 2020-02-04, 14:31

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Most/all chipsets when off CPU caches were a thing actually have methods to force access to go exclusively into the cache, without touching RAM, essentially turning it into the RAM itself. Other methods assume that whatever you do in one spot remains in caches but you are still at the mercy of …

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Re: Memtest86+: does it also test cache memory?

Posted on 2020-02-04, 11:49

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Testing cache specifically requires chipset programming that BIOSes use to determine how much cache is there etc. Memtest86 has no such functionality and I'm not aware of any software that can do it.

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Re: Internal OPL3 ISA 8 bits (PCXT)

Posted on 2020-02-03, 13:15

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

There's 3 ranges used by SB cards. 2x0...2x3 for OPL3/SAA, 2x8...2x9 for OPL2 and 388...389/38B for OPL2/3.

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Re: Upgrading Socket 4 L2 cache to 2048k (ECS SI5PI MB)

Posted on 2020-02-03, 08:39

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

JP12 needs to be added and connected and you probably need the largest TAG that you can have there for 2MB. Without JP12 half the cache goes nowhere and you get the crashes you observe.

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Re: Can't get YMF71x to work in DOS mode

Posted on 2020-02-02, 18:15

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

That's great, enjoy the game ~

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Re: Can't get YMF71x to work in DOS mode

Posted on 2020-02-02, 16:18

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

BIOS startup shows assignments given by the BIOS, SETYMF will override those with whatever you have chosen and can also update SET BLASTER if you make it (it is an option in the program). Try setting PnP OS installed to YES in the BIOS, I have had to do this on one motherboard to get the card work. …

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Re: Can't get YMF71x to work in DOS mode

Posted on 2020-02-02, 14:36

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

Do sound tests work in SETYMF ? If there is sound but IRQ count stays zero you likely have an IRQ conflict but if no sound happens at all then the problem is DMA related if there are no other error messages shown during program startup. Are there error messages shown by SETYMF ? You definitely …

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Re: Control exclusive access to audio hardware under Windows 98?

Posted on 2020-02-02, 11:57

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

WDM drivers will mix as many sound streams as wanted, VXD are at the mercy of what driver allows and on most cards there's only one stream possible.

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