Re: AWE32 not working

Posted on 2023-10-13, 10:09

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Kouwes wrote on 2023-10-13, 05:36: and I tried the Add new hardware function in Win98 IMHO, best is to do the simplest possible test - and that's in DOS: Re: The Soundblaster DSP project and you can skip the step0 - as you don't need to short any pins in your case.

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Re: The Soundblaster DSP project

Posted on 2023-10-13, 09:29

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I hope the AT89S52 chips would arrive soon same from my side. BTW, @Maelgrum if you need a tester for "6 clocks cycles"-mode, i.e. if you believe anything can be fixed/improved that way, just keep in mind I ordered "AT89C51RC2". How hard would it be to implement fake ACK for the MPU? The same way …

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Re: The Soundblaster DSP project

Posted on 2023-10-13, 09:21

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

aitotat wrote on 2023-10-13, 04:25: I hope the AT89S52 chips would arrive soon same from my side. BTW, @Maelgrum if you need a tester for "6 clocks cycles"-mode, i.e. if you believe anything can be fixed/improved that way, just keep in mind I ordered "AT89C51RC2".

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Re: AWE32 not working

Posted on 2023-10-12, 23:32

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have one PCI sound card, which was hit on the crystal - it was broken, I mean replacing it - make the card working again. so, in this case - nothing is for sure.

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Re: ELSA Winner 2000 Pro PCI 4MB BIOS dump needed

Posted on 2023-10-12, 23:15

by

by mattw

in Marvin \ Video

in Marvin \ Video

what about the BIOS dump here: https://www.vgamuseum.info/index.php/cpu/item/355-s3-vision968 when I open it, it says: ELSA WINNER 2000PRO/X-8 VESA VGA DPMS DDC1 BIOS Version 1.21.01-B also, ELSA used to release CDs regularly with all their files and sometimes including the BIOSes: https://www. …

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Re: MAME Roland MPU-401 Emulator

Posted on 2023-10-12, 23:03

by

by mattw

in Marvin \ Sound

in Marvin \ Sound

I would think these things got patched like they did on dosbox since then - but I can't claim to be an expert on softmpu... I tested them earlier today on the latest SoftMPU v1.9 - not only they are there, but test "2A" and "1A" - cause total freeze with SoftMPU (i.e. it's worse than the old test …

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Re: MAME Roland MPU-401 Emulator

Posted on 2023-10-12, 22:37

by

by mattw

in Marvin \ Sound

in Marvin \ Sound

keropi wrote on 2023-10-12, 22:33: I would say that since SoftMPU exists it defeats the purpose of some mame-box emulating an mpu? SoftMPU has issues and limitations... in fact even simple tests show how different it responds compared to Roland ROM: Re: Missing music in Gateway (MT-32 mode)

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MAME Roland MPU-401 Emulator

Posted on 2023-10-12, 22:20

by

by mattw

in Marvin \ Sound

in Marvin \ Sound

hi All, today, by pure chance, looking at an unrelated topic, I found out that 2013, MAME not only made dump of the Original Roland MPU-401 ROM (i.e. firmware), but also wrote emulator of the Real Device using the Real firmware, my initial realization about it is here: https://www.vogons.org/ …

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Re: The Soundblaster DSP project

Posted on 2023-10-12, 21:50

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would not assume that it was not made :D yeah, I believe you cloned the Music-Quest card, but it's clone of a clone - re-implementation, not running the exact Roland code. anyway, not to spam the thread here with more off-topic, but I was real amazed so many years ago MAME dumped the Roland ROM. …

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Re: Roland LAPC-N / I question

Posted on 2023-10-12, 21:02

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@Great Hierophant helped me today telling me how to check if the MPU401 is responding at all. So, maybe you can do as 1st test the following: C:\>debug --> that's DOS DEBUG.exe tool -o 331 ac -i 330 FE --> Command Acknowledgement response -i 330 15 --> MPU Version 1.5 -o 331 ad -i 330 FE --> Command …

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Re: The Soundblaster DSP project

Posted on 2023-10-12, 20:58

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This information is from from MAME team. MAME includes 8052-emulator for the DSP, as far as I can tell from their code: https://github.com/mamedev/mame/blob/master/src/devices/bus/isa/sb16.cpp [EDIT] BTW, I will go entirely off-topic, but just because @Maelgrum, with that comment ,took my attention …

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Re: The Soundblaster DSP project

Posted on 2023-10-11, 00:26

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@rasz_pl: yeah, there are many, plenty of, I2S options and they are all cheap.

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Re: The Soundblaster DSP project

Posted on 2023-10-11, 00:12

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, I am also can't find datasheet. But with oscilloscope, it is not hard to find all important pins - bit clock, bit data, and some form of LR word clock. AKAI equipment uses AK4501 and the full Service Manual is available here: https://archive.org/details/manual_TC890_SM_AKAI_EN so, all the pins …

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Re: The Soundblaster DSP project

Posted on 2023-10-10, 23:39

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Why you want to capture DAC data? two reasons - way to analyze the presence of the 'clicking' issue, as well get much higher quality analog output instead of 30 years old one. 1. If you want to do Spdif output, it's is complicated, as sample rate is variable. I believe by SPDIF you understood - …

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Re: The Soundblaster DSP project

Posted on 2023-10-10, 21:45

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Wow, it turned out that Creative DACs (CT1701 and CT1703) are actually remarked Asahi-Kasei DACs (AK4501 and AK4503): https://www.vogons.org/viewtopic.php?p=702518#p702518 So, it's actually almost the same AK4510 DAC used on the Yamaha card: https://www.vogons.org/viewtopic.php?p=424930#p424930 I do …

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Re: The Soundblaster DSP project

Posted on 2023-10-10, 21:18

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Don't see anything like some DAC check or init. I found the following block diagram: awe32_blocks.jpg So, it looks like the DAC data should be possible to be intercepted on an empty ASP/CSP socket, because they are passing through there - it will be convenient to solder on an empty ASP/CSP socket …

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Re: The Soundblaster DSP project

Posted on 2023-10-10, 20:14

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

but synchronising the DSP, which runs at 24MHz with the Sigma/Delta DAC, which runs at 46.615 MHz from a different crystal. what about on top of any DSP modification, we modded the card to use different DAC, better yet Digital SPDIF output, like for example Yamaha WaveBlaster mod: https://www. …

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Re: Sound Blaster AWE32 (CT3780) Component ID

Posted on 2023-10-09, 15:41

by

by mattw

in Marvin \ Sound

in Marvin \ Sound

that's exactly what it says "LC", i.e. (Inductance + Capacitor) or LC filter. it's not easy to find the exact values of the build-in Coil and build-in Capacitor inside it -I mean someone that has that exact board needs also to have proper equipment to measure it and tell you (none of my few AWE32 …

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Request: Diskette Image of "Power programming the IBM XGA" book

Posted on 2023-10-08, 14:56

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

hi All, a little embarrassing, but as messy person as I am - I displaced somewhere the accompanying diskette to the book from the subject. I remember that I made 2 backup images, but I cannot find them either at the moment, which drove me crazy searching impatiently in the last few hours - I wanted …

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Re: The Soundblaster DSP project

Posted on 2023-10-08, 11:34

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

DerBaum wrote on 2023-10-08, 11:11: on my ct3600 the chip is just covered with a sticker. the sticker covers up that it is a ct2290 chip. it looks like Creative totally cheap-out, since its PAL (i.e. programmable) chip, it seems they had old re-marked chips left-over from CT2290 cards and …

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