Re: Graphics adapter suggestion for a 486 DOS PC

Posted on 2024-09-12, 13:13

by

by florian3

in Marvin \ Video

in Marvin \ Video

The part in the bottom left of "current cpu front.jpg" looks like a voltage regulator with heatsink. But before trying to use a 3.3V CPU you would definitely have to find out what JP12 does and measure the voltage. JP10 which is right next to JP12 in "photo_2024-09-10_14-45-38.jpg File size" is …

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Re: Graphics adapter suggestion for a 486 DOS PC

Posted on 2024-09-08, 22:08

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by florian3

in Marvin \ Video

in Marvin \ Video

nimruil wrote on 2024-09-08, 18:33: About VRM, manual says pc is DX4 compatible, would i still need a VRM in this case? If the board is compatible then you should see voltage regulator components near the CPU socket and a jumper to set the voltage. There are also DX4 overdrive processors that …

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Re: Is this a good pc to play pure dos games? Pentium 150mhz ram32mb sb live!

Posted on 2024-06-08, 04:33

by

by florian3

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

For a cheap ISA sound card you get something like https://page.auctions.yahoo.co.jp/jp/auction/b1129737463 (no Yamaha OPL3, but Crystal 4237 isn’t bad)

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Re: My Build and what I am calling the MICRO 486

Posted on 2024-06-08, 04:27

by

by florian3

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The retroweb page for the PC-420 mentions PS/2 mouse. The manual however says that pins 2 and 6 of the Mini DIN port are NC. But the bios documentation shows PS/2 mouse support. This page also says that the Mini-DIN port is combined mouse and keyboard: https://web.archive.org/web/19970327052802/ …

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Re: My Build and what I am calling the MICRO 486

Posted on 2024-06-08, 03:25

by

by florian3

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The retroweb page for the PC-420 mentions PS/2 mouse. The manual however says that pins 2 and 6 of the Mini DIN port are NC. But the bios documentation shows PS/2 mouse support. This page also says that the Mini-DIN port is combined mouse and keyboard: https://web.archive.org/web/19970327052802/ …

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Re: Gotek like Optical Driver Emulator - Is it possible?

Posted on 2024-04-27, 12:33

by

by florian3

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

From what I understand ZuluIDE currently has a limited feature set. The CD Audio code has not been ported over from ZuluSCSI yet. I ordered one anyway. I do have several ZuluSCSI with DAC Attack CD Audio addon boards and I am quite happy with them. I have one in every retro PC that has a SCSI …

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-04-14, 13:01

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by florian3

in Marvin \ Sound

in Marvin \ Sound

I will probably build one more card for myself, that leaves me with 3 more bare PCBs and some parts in case anyone is looking to build one. Maybe I'm a bit slow, but has the design been finalized/known-good? If so, I'm definitely up for one, although looking at your Chicago location it might be …

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Re: EMU Proteus/1 support for Sierra games?

Posted on 2024-04-14, 12:13

by

by florian3

in Marvin \ Sound

in Marvin \ Sound

Spikey wrote on 2024-04-14, 09:46: @Florian, still would love it if you could upload SQ5 and KQ6 in lossless so I can remove the noise. I don’t have a lossless version, would need to record it again.

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-04-13, 16:09

by

by florian3

in Marvin \ Sound

in Marvin \ Sound

I will probably build one more card for myself, that leaves me with 3 more bare PCBs and some parts in case anyone is looking to build one.

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-04-13, 15:58

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by florian3

in Marvin \ Sound

in Marvin \ Sound

I can't get Compose and Playrec to run on my 486 DX33. If i remember correctly i encountered a similar problem - the Playrec and Compose did not start on my 386 machine. As a result, it started only on a clone of the XT motherboard with a processor frequency of 4.7 MHz. I think this is a problem …

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-04-13, 01:09

by

by florian3

in Marvin \ Sound

in Marvin \ Sound

I'm almost done with my build, missing a bracket and wire in matching colors for the ferrite core thing. Also just noticed that I soldered on the dip switches the wrong way, so it doesn't match the silk screen. I can't get Compose and Playrec to run on my 486 DX33. With turbo enabled it complains …

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Re: EMU Proteus/1 support for Sierra games?

Posted on 2024-04-10, 20:00

by

by florian3

in Marvin \ Sound

in Marvin \ Sound

Well, noticing that KQ6 didn't have this issue, I found the difference, the SQ5GM lacks a Bank Select MSB (cc#0) message. Inserted into SQ5 that's attached. I only put one at the start of the soundtrack, I'll edit further if this only fixes the Sierra Fanfare at the start. If you can rerecord, it …

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Re: HIDman - USB to PS/2 converter (Open Source)

Posted on 2024-03-24, 18:23

by

by florian3

in Release Announcements

in Release Announcements

Looks like the include of ch559.h in util.c should be lower case. I thought all of those were fixed at some point, maybe it regressed. OK it's fixed now. I also finally merged the pull requests after a year... Also latest updates add keyboard LED support. Next will be hub support. I don't seem to …

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-03-21, 01:01

by

by florian3

in Marvin \ Sound

in Marvin \ Sound

I ordered the YM2164 from a supplier in China that has sold me some authentic Yamaha chips before. Fingers crossed… The same thing. Lake Store or something like that. But that was YM3812 with strange label on them, though perfectly working. I received YM2164 from two different sources (new and used …

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Re: EMU Proteus/1 support for Sierra games?

Posted on 2024-03-19, 19:42

by

by florian3

in Marvin \ Sound

in Marvin \ Sound

Here is a recording of Space Quest 5 https://www.dropbox.com/scl/fi/dletjzo9h3honh … 5bb9vsf57r&dl=0

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Re: EMU Proteus/1 support for Sierra games?

Posted on 2024-03-15, 19:07

by

by florian3

in Marvin \ Sound

in Marvin \ Sound

Here is a recording of Kings Quest VI Soundtrack played on UltraProteus with GM settings ROM card. MIDI file downloaded from karlsitretro.com. According to the .txt this MIDI file is originally from Quest Studios. https://www.dropbox.com/scl/fi/dqq67vsphf4jd2dr9d936/KingsQuest6-UltraProteusGM.m4a? …

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Re: EMU Proteus/1 support for Sierra games?

Posted on 2024-03-13, 00:21

by

by florian3

in Marvin \ Sound

in Marvin \ Sound

Spikey wrote on 2024-03-12, 06:23: Yes please! 😀 UltraProteus is definitely on my want list. Are you interested in any specific games?

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Re: EMU Proteus/1 support for Sierra games?

Posted on 2024-03-12, 02:00

by

by florian3

in Marvin \ Sound

in Marvin \ Sound

I have an UltraProteus and the GM mappings ROM. Could make recordings if anyone is interested.

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-03-12, 00:02

by

by florian3

in Marvin \ Sound

in Marvin \ Sound

rkurbatov wrote: Now the only questionable things are YM synth/DAC - the heart of the synth and that SRAM chips. I ordered the YM2164 from a supplier in China that has sold me some authentic Yamaha chips before. Fingers crossed…

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Re: Looking for IBM Music Feature Card owners

Posted on 2024-03-11, 22:23

by

by florian3

in Marvin \ Sound

in Marvin \ Sound

I will order most of the standard parts from Mouser and they have 720 Ohm resistors. The Kemet 40uH coil is backorderd there with ETA June. Not sure if I will wait or maybe just use the 60uH part. I ordered most of the NOS parts from utsource and some on ebay.

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