Re: The Soundblaster DSP project

Posted on 2023-10-11, 01:15

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

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. The DOS Days article on SB16 has a section regarding some kind of "noise" issues, which suggested the cause being the different DACs being used. Though I'm …

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Re: The Soundblaster DSP project

Posted on 2023-10-07, 10:30

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Tiido wrote on 2023-10-07, 09:11: The UART is for MIDI which is 31250baud and that can be divided exactly from the 24MHz already present. For regular COM port stuff you do want a 11.0592 or some multiple of that. That's good to know.

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Re: The Soundblaster DSP project

Posted on 2023-10-07, 09:09

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Most compatible will be classic 24MHz mcu. I see the Oscillator crystal connected to the 8052 MCU is 24MHz, on all my SB16 cards, but is that really the speed, because here: https://web.archive.org/web/20100103134333/http://8052.com/tuttimng.phtml it's explained that it depends on how many …

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Re: The Soundblaster DSP project

Posted on 2023-10-07, 04:38

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Two more NOPs can be added, and source recompiled )) From the 4.13 disassembly, all the double NOP occurrences are the same, with only the last MOVX instruction different in direction (read or write). mov r0,#0 ; 1332 78 00 x. nop ; 1334 00 . nop ; 1335 00 . movx a,@r0 ; 1336 e2 b or mov r0,#0 ; …

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Re: The Soundblaster DSP project

Posted on 2023-10-06, 15:11

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So i did a execution trace of interrupt handler = its ~94 cycle execution trace of command 0x14 execution path is ~174 cycle In total it is 268 cycles - even in most optimistic case - we out of bounds (> 250) Hmmm... I wonder if it's possible to configure the 8052 to run in faster modes (6T or even …

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Re: "Bios Patcher" questions

Posted on 2023-10-05, 18:14

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If you're trying to patch AMI BIOS, you can use version 6.0 alpha 15 and there is option to remove this annoying "www. ROM. by..." message. This is from "help": "/l - skip displaying www. ROM. by logo in BIOS (useful for some AMI)". But this doesn't work on Award/Phoenix BIOSes for sure. And not …

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Re: "Bios Patcher" questions

Posted on 2023-10-05, 05:52

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

13.New Freq in Setup open : not found. for skip this step press "s" or any another key for continue... 14.Set "Y" as default on exit: for skip this step press "s" or any another key for continue...s Speaking of BIOS Patcher, does anyone have backups of all the latest files on rom.by? I tried …

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Re: The Soundblaster DSP project

Posted on 2023-10-04, 05:38

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

that's kind off-topic here, but probably just custom-modified card by someone and then it was sold and ended up with you, because 5 years ago it was posted here "I de-CQMed my AWE32 PnP CT3990...!": https://www.vogons.org/viewtopic.php?f=62&t=57746 and such modification became popular among the …

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Re: The Soundblaster DSP project

Posted on 2023-10-03, 17:00

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a CT2950 with YMF289B instead of CQM... Can you post a good quality picture (front and back) of your ct2950 with ymf289b opl? Here is mine without OPL (4.13 DSP): 2023-10-03 14.08.50.jpg2023-10-03 14.09.13.jpg I think it could be a nice side project to try to find out of the missing opl´s …

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Re: The Soundblaster DSP project

Posted on 2023-10-03, 06:49

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ct2940 has a real opl and on ct3600 and ct 2950 it is not present. I dont know how they decide to use the opl or the creative emulation. maybe in software by a setting a byte. But it also can be done on the hardware side to disable CQM when the OPL is present. I have a CT2950 with YMF289B instead …

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Re: Fur Elise

Posted on 2023-09-28, 06:50

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by LSS10999

in Milliways

in Milliways

Sorry don't know how to make an umlaut. Not sure about the topic... How to input umlauts depends on the keyboard layout. Assuming a US keyboard, if you choose German QWERTZ input layout 'ü' can be entered via the '[' key. If you're typing from smartphones I think many keyboard providers offer …

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Re: The Soundblaster DSP project

Posted on 2023-09-27, 09:03

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I can not understand a reasons behind this delays, It's only inserted then read/write done to sb data port. Looks like 'data ready' bit in DSP is set by front edge of ISA WR signal, instead of back edge. Some error in hardware design of early SB16, what propagated in fw code? Don't know)) I haven't …

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Re: The Soundblaster DSP project

Posted on 2023-09-27, 02:48

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Some more modern 8051 MCUs operate at enhanced timings like 1T/2T. While not a problem for internal computing processes, it can be a problem with bit-banged I/O (with external devices) where strict timings (delays) are required. Not sure how many I/O interactions does the Creative DSP firmware have …

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Re: The Soundblaster DSP project

Posted on 2023-09-27, 00:59

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you! This, does it indeed play MIDI ? Yeah, it does give an NMI error but i think that might be due to my mainboard. Which i can ignore with F1 and continue. I recall seeing NMI error on a working, vanilla AWE64 Gold as well. I wonder if Creative intentionally triggered such an error to …

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Re: Which memory manager is better? Memmaker, QEMM or 386max.

Posted on 2023-09-19, 04:58

by

by LSS10999

in Marvin \ Software

in Marvin \ Software

EMS can be enabled with EMSMAGIC if needed. Interesting... UMBPCI+EMSMAGIC. I wonder if anyone ever tried this before. It seems to target NTVDM usage but can also be used for real DOS... From the manual it seems it can allocate EMS page frame (64K) in conventional memory and can be loaded/unloaded …

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Re: Where are the WinXP SATA/AHCI drivers for VIA chipsets, primarily K8M800?

Posted on 2023-09-18, 08:24

by

by LSS10999

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I found out why Windows XP's installer kept BSODing on my motherboard -- it needs a textmode driver for SATA (Weird thing is this happens even when the sata controller is turned off and I'm using IDE, however). The driver must match the chipset used on the southbridge (VIA VT8237); I tried …

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Re: Unity Runtime Fee

Posted on 2023-09-18, 01:34

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by LSS10999

in Release Announcements

in Release Announcements

This depends on to the extent such terms can be enforced though. There are times when companies have tried to enforce a term of an EULA and then lost in court ( Vernor v. Autodesk comes to mind). The whole runtime fee thing makes me wonder how Unity is able to enforce it in the first place. Can …

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Re: Unity Runtime Fee

Posted on 2023-09-16, 05:45

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by LSS10999

in Release Announcements

in Release Announcements

Not surprising coming from Riccitiello, the same guy that wanted to charge a fee for each additional ammo clip in a Battlefield. I was wondering about the "retroactive" aspect of this. Is that even legal? For example, it would be like if you bought a drill 5 years ago, then the manufacturer just …

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Re: Unity Runtime Fee

Posted on 2023-09-14, 01:44

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by LSS10999

in Release Announcements

in Release Announcements

From the updated FAQ page, it seems Unity counts installs on separate devices individually, so problems related to install-bombing as well as unwanted installs (aka piracy) remain open. The rationale is that they do not want to track identity across different devices, but in today's online ecosystem …

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Re: Help to solve a problem windows 10

Posted on 2023-09-14, 01:26

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by LSS10999

in Milliways

in Milliways

My advice to get between 120GB to 250GB storage still stands. No way you can do it with that storage on a shoe-string capacity. The fresh win 10 install with all the updates done and some basic apps is around 30 to 40GB. Guaranteed. I know this as I installed win 10 multiple times on many computers …

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