Re: T-04YBSC-A, new YMF71x based sound card + SETYMF utility

Posted on 2020-10-22, 22:08

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

Yeah, AWE32/64 will not work properly with that board, since not enough IO ranges can be passed to the ISA slot. I now actually finally have all the parts necessary to make the new sound cards, but it sort of is a busy time right now, Orpheus just got released and I'm not intent on stealing or …

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Re: An AdLib-Compatible Card (1986) Older than AdLib (1987)

Posted on 2020-10-21, 20:06

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

Very retro looking, cool find ~

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Re: CT2230 "French Version"?

Posted on 2020-10-21, 12:19

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Creative had many manufacturers make the chips for them. That particular mixer chip probably was made by ST, it is the only french manfacturer I know of.

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Re: Large PATA hard drives in retro PCs.

Posted on 2020-10-19, 21:13

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

For windows you need LBA48 patched HDD driver or things beyond 128GB get corrupted when written to, many BIOSes also have LBA48 limits and it will cause corruption the same way. I don't know if EZ-Drive is LBA48 capable or not, XTIDE is though. Without LBA48 support you just make a partition that …

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Re: Aztech Waverider 32+ Problem

Posted on 2020-10-19, 11:53

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

The problem is most probably dried up capacitors, there are a bunch of 1µF ones that don't take much to degrade beyond usefulness compared to a 10µF one.

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Re: SB Live CD-DA/Redbook in DOS

Posted on 2020-10-18, 09:32

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

WDM drivers business only applies to physical CD drives, emulation software can simply open a WaveOut stream and play the data as if you started a music file on the computer.

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Re: 4DPS BIOS problems? All 3 UV-EPROM chips suddenly got bad?

Posted on 2020-10-12, 04:02

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It is worth to reseat all the socketed parts, sometimes it makes a difference. Two of the boards have an OTP EPROM and those shouldn't suffer from bitrot right now at all, nor the UV one since the orginal label is still intact. Is the CPU jumpered right ? It might be running out of spec. There's …

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Re: Cyrix 5x86 at 16.6Mhz with 8.3Mhz fsb.

Posted on 2020-10-10, 08:32

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A lot of boards have PLLs with settings available for really low speeds, meant for laptop power save scenarios. Usually only 3 or 4 settings are ever documented (25, 33, 40, 50) but there's often 4 more settings that have various slow speeds. I have one board that had 4MHz available but at that …

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Re: Modifying Socket 7 motherboards for 1.9v (Tillamook) CPU voltage

Posted on 2020-10-09, 20:35

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Basically you desolder one of the resistors and install a potentiometer instead, with value that is in not far from the range seem on board already. You can then set an arbitrary voltage that you can set with just turn of the pot. This way is possible with most voltage regulators prior to …

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Re: Replacement for AMI- KEY 2 bios chip

Posted on 2020-10-09, 00:30

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Such things usually are protected so that cloning them would require physical access to the ROM inside the chip. The companies who made them are not gonna make it easy for you 🤣.

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Re: What is the current carrying capacity of a wire in 40-pin IDE (ATA) and 44-pin IDE (ATA) cables ?

Posted on 2020-10-08, 23:04

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

1A is about max for a pin in the connector, and seems cable itself is less capable. There will be some level of heating, depending on (contact) resistance but in general it isn't gonna be a problem unless you try to do something overkill 🤣.

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Re: Replacement for AMI- KEY 2 bios chip

Posted on 2020-10-08, 22:46

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In theory they are generic 8041/8042 type MCUs with mask ROM and any programmable variation should be workable.

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Re: General Midi/emulation problems on SB32 CT3670 (AWE)

Posted on 2020-10-07, 20:34

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

The MIDI emulation TSR is only supposed to work properly with real-mode games, any protected mode games are probably not going to work unless they have native AWE support.

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Re: Using a vintage multi-track recorder as a mixer, namely the Roland VS-880EX - might apply to other Roland VS- units

Posted on 2020-10-05, 01:43

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

I am very very slowly working on an ISA+VLB IO card that can definitely use SATA, USB mass storage and probably SD cards too (and drive emulation), with bus mastering for maximum performance, it would put the end to this sort of storage problem. Alas time and money are low, other commitments must …

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Re: My DIY ISA Audio Interface

Posted on 2020-10-02, 19:23

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

4580 is sort of japanese version of NE5532, with very similar performance (except 4580 has much higher output current capability). 2100 is a toy compared to those and the MC33078 is inferior to 4580 and 5532 also. What are the 5534 used for ? It isn't normal to use single section opamp unless you …

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Re: 4Mx9 70ns 30-pin SIMM

Posted on 2020-10-02, 19:04

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I made 4MB ones not so long ago. 16MB ones are not gonna any more difficult than 4MB ones, except locating the chips since they aren't so easy to find, or at least not in good cost anyway...

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Re: My DIY ISA Audio Interface

Posted on 2020-10-02, 14:58

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

The effects usually aren't gonna be audible but certainly are measurable. But ok, very good. It is very nice to see new hardware being made ~ For opamps I suggest getting NJM4580 or equivalents from other companies, very high performance, lot of current capability and also cheap parts (not RRIO …

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Re: My DIY ISA Audio Interface

Posted on 2020-10-02, 14:36

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

Very cool ! I do have some concerns about part choice. I see film caps that are in sound path, suggesting striving for superior sound quality, but at the same time everything is made with noisy carbon resistors and not metal film ones, and I think I'm seeing tantalums in audio path also which …

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Re: Fixing/cleaning skipping optical drives

Posted on 2020-10-01, 19:26

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Dust gets under the lens and on the mirrors in the laser assembly. Some air compressor method is probably necessary to get the dust out from inside the assembly or at least get disturbed enough that readback becomes possible. Sometimes the lasers have simply burned out...

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Re: OPL2 vs. OPL3 Audible differences, digital recording comparison

Posted on 2020-10-01, 17:24

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

I appreciate the lack of sample rate conversion ~

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