Re: The Soundblaster DSP project
Posted on 2025-04-15, 06:31
S95Sedan, thank you for the confirmation and of course for your work on the DSP firmwares code!
Re: The Soundblaster DSP project
Posted on 2025-04-15, 06:16
Maybe all the issues mentioned back then have been addressed at this point, just need some official clarification... Now I see. The old patched DSP version 4.17 in the github repo was "v416-6k_patch1_32505fc2.bin" (I keep all the files locally just in case), but now there is a newer freshly …
Re: The Soundblaster DSP project
Posted on 2025-04-15, 02:18
So is the "4.16-patch1.zip" not the latest patch bearing version number 4.17 then? If so, probably I may need to take the card out and flash it again, although it's been working fine so far. I recall there was a game called "BioMenace" which also had this "lockup upon firing" behavior that doesn't …
Re: What frequency crystal oscillator do I need to run N80387SX-25 FPU with Am386SX/SXL-33 CPU in asynchronous mode?
Posted on 2025-04-15, 01:40
Ok, then I'll bet, that in async. mode i387SX FPU also uses 2 divisor (or 1/2 multiplier, to be correct) for the frequency from its own OSC-1 oscillator. So, if I install 50 MHz active crystal oscillator in OSC-1 socket, my i387SX-25 FPU will work with 25 MHz frequency (which is the right frequency …
Re: What frequency crystal oscillator do I need to run N80387SX-25 FPU with Am386SX/SXL-33 CPU in asynchronous mode?
Posted on 2025-04-15, 00:06
OK let me see if I can recall it proper.... in Sync mode both (386 and 486) use same cpu2 clock/crystal and divides by two. Exactly. In Async the cpu still uses cpu2 clock but fpu uses mclock and divides it by two, the ratio of the fpu clock to cpu2 clock must fall between 66% and 133% for solid …
Re: The Soundblaster DSP project
Posted on 2025-04-14, 23:37
In the 4.13-patch5 the end of some sections were replaced with code jumps. This part breaks duke2 compatibility to some degree and thats why it was removed: vector_dma_dac_adpcm2_end: clr pin_dsp_busy ljmp X008c ; Patch5: X008c ljmp And replaced with this in 4.17: vector_dma_dac_adpcm2_end: clr pin …
Re: DIY Bios Modding guide Jan Steunebrink k6-2+/3+ 128gb
Posted on 2025-04-14, 23:27
About CBROM V1.30C, I selected this 1999 version because it worked best on all 1997/1998/1999 socket 5/7 Award BIOSes. For 2000+ and Slot 1 BIOSes I do use a later CBROM version, usually V2.07. I found CBROM version 1.30 (seems like it's slightly older than your attached version 1.30 C ) and …
Re: The Soundblaster DSP project
Posted on 2025-04-14, 22:11
I'm a bit puzzled by the 4.17 one where it says "Removed Code Jumps (vector_dma_dac_adpcm*, dac_silence, vector_op5)(Needed for duke2 compatibility)" Does that mean it *breaks* compatibility with duke nukem 2 or on the contrary it fixes some bug ? It seems like Duke Nukem 2 is unplayable with DSP …
[SOLVED] What frequency crystal oscillator do I need to run N80387SX-25 FPU with Am386SX/SXL-33 CPU in async. mode?
Posted on 2025-04-14, 21:51
I've never tried this before, but I want to run an intel 387SX-25 FPU in asynchronous mode with AMD 386SX-33 CPU. The motherboard is Zida 8517 V3.2 (identical to ECS 8517 board , Gemlight GMB-386SAT and 303N1 ) with AMD Am386SX/SXL-33 CPU. There is an empty socket for a FPU active crystal oscillator …
Re: Yamaha YMF71x SB Pro Mixer Bug Issue Fix
Posted on 2025-04-14, 09:18
I just used the jumpers which just changes the output from Speaker Out to Line Out. The only physical mod to the card was the capacitor swap out. Ahaa, now I see. The two jumpers near the amp's electrolytic capacitors are for bypassing the amplified output. One less modification to make for this …
Re: Yamaha YMF71x SB Pro Mixer Bug Issue Fix
Posted on 2025-04-14, 08:00
zuldan wrote on 2025-04-13, 02:10: Finally got round to modding my Yamaha Audician 32 Plus (YMF719) and disabling the amp. Can you give us some simple diagram or some brief explanation with pictures (before/after) for the amp disabling modification?
Re: The Soundblaster DSP project
Posted on 2025-04-12, 07:39
Some questions I hope to find answers to: Are there any downsides to upgrading any specific models to any specific DSP version? What kind of chips are needed and what is the cheapest reliable way to find them? Where are the relevant firmware downloads and are there any cards that this shouldn't be …
Re: Tantalum recapping project
Posted on 2025-04-10, 03:46
There is an "urban legend" according to which tantalum capacitors (especially the "old ones" - whatever it means) that stay long time out of operational usage tend to explode more often than the ones in regular usage. I've never seen an exploding tantalum capacitor in live, but I often see leaky …
Re: AM5x86 P75 AWD to 160MHz help
Posted on 2025-04-05, 20:50
brotherdg2@gmail.com wrote on 2025-04-05, 19:54: This is a myth. The processors are identical. The differences in labeling are related to marketing reasons. What is a myth? Do you mean that AMD 5x86 133ADW processor can survive higher temperature than 55 °C while working? I wouldn't risk to check …
Re: AM5x86 P75 AWD to 160MHz help
Posted on 2025-04-05, 14:24
4 V for AMD Am5x86-P75 X5-133ADW seems too much to me. ADZ CPUs can work up to 85 °C, but ADW chips are limited to maximum of 55 °C. So ADW CPUs can withstand far less overvoltage and overclocking than ADZ.
Re: Jetway J-530BF (SS7) - Onboard ESS Solo 1 - How to use?
Posted on 2025-04-05, 12:57
Yeah, I guess these types of original connector brackets are very rarely sold on fleabay, even bundled with old motherboards. When dismantling parts from old PC configurations for sale people usually take out the motherboards without these connectors. You can buy a "blank" ISA/PCI bracket/back plate …
Re: Jetway J-530BF (SS7) - Onboard ESS Solo 1 - How to use?
Posted on 2025-04-05, 12:18
Ok, I searched for some info on my PCChips M571 clone mobo and I found out that the audio connector pinout is compatible with the one on your Jetway J-530BF board: Mike ring --------| Mike ground -----| | |--------- Line Out ground Line In ring--| | | | |------ Line Out ring | | | | | …
Re: Jetway J-530BF (SS7) - Onboard ESS Solo 1 - How to use?
Posted on 2025-04-05, 11:45
You have to find game/MIDI port + sound jacks bracket like this one: sb1.jpg sb2.jpg The pictured one is for PCChips mobo, I don't know if those brackets from different manufacturers are interchangeable/pin compatible. P.S. You have the pinouts for the motherboard's connectors, so you can also make …
Re: UNISOUND - Universal ISA PnP Sound Card Driver for DOS v0.81b
Posted on 2025-04-01, 15:10
vico wrote on 2025-04-01, 15:03: Actually the game doesn't work when it finds E620 or other strange value in the BLASTER variable. Actually the error with variables setting was in the second row of the batch file. I don't know which BLASTER values will work with this game.
Re: UNISOUND - Universal ISA PnP Sound Card Driver for DOS v0.81b
Posted on 2025-04-01, 14:51
Create a HOCUS.BAT file in the game folder containing the following: @ECHO OFF SET BLASTER=%BLASTER% SET BLASTER=A220 I5 D1 H5 P330 T6 HOCUS.EXE SET BLASTER=%BLAST% SET BLAST= You can then run the game from this .bat file. BLASTER values may vary; don't forget to change them to your correct …
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