Re: Guillemot Maxi Studio Isis DOS support

Posted on 2024-01-25, 18:35

by

by makechu

in Marvin \ Sound

in Marvin \ Sound

Well, isn't this tragic that a card with reasonably good chips has been completely unnecessarily messed up by Guillemot so that it won't work properly in DOS... I bought the ISIS card last year, and had to fix it for two days to get it to not crash all the time when trying to boot in to Windows 98 …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2023-11-20, 17:16

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

I will only add one final comment, before I go: It does seem that QDI Kinetiz 7E is a much better board overall compared to the Abit KT7A (it is much better designed in circuitry?). However the KT7A does seem to be more common, since some people have 3 of them. One additional important note, …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2023-11-19, 17:53

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

What about your QDI Kinetiz 7E? You said you recapped it all with polymer capacitors. Did you had to change anything else to make sure the external compensation loop was fine for the board to work normally? Or was it unnecessary because Kinetiz 7E has better ICs/voltage regulators than KT7A? It has …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2023-11-18, 21:06

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

Unfortunately, I am having too much fun with the already perfectly functioning QDI Kinetiz-7E, so much so that I might not be in any hurry to come back to fiddling with the KT7A. Kinetiz-7E uses the same chipset, also has an ISA slot, and at least I have had zero issues with Geforce 4 Ti 4400, FX …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2023-11-18, 20:53

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

How about a hint then...? Sure, I'm familiar with the usual warnings of using polymers in a circuit that's not designed for too low an ESR. A good example is old PSUs where the ripple becomes unacceptable when polymers are placed in the secondary filtering circuit. But P4 and later VRMs are almost …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2023-10-26, 16:30

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

For what it's worth. I too had some weird issue with Abit KT7A V1.3, that I would not get a picture with Geforce 4 MX 440-SE, but on another same exact KT133A chipset based motherboard QDI Kinetiz-7E, there was no problems... Have to test Geforce FX-5900 Ultra and 6800 XT on the KT7A later. Those …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2023-10-23, 20:17

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

For what it's worth. I too had some weird issue with Abit KT7A V1.3, that I would not get a picture with Geforce 4 MX 440-SE, but on another same exact KT133A chipset based motherboard QDI Kinetiz-7E, there was no problems... Have to test Geforce FX-5900 Ultra and 6800 XT on the KT7A later. Those …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2023-10-19, 13:49

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

I forgot to mention, that the output impedance and stability of the regulator circuit is also affected by other factors as well, besides the capacitors, such as resistive losses, capacitive coupling and mutual inductances between power planes and sensitive traces, and trace inductances, depending on …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2023-10-19, 01:21

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

I'll have to see if I dare to post how I determined everything when I did the recapping, as I do not actually want anyone to follow in my footsteps with this. Probably better that I just won't do it... Knowledge just increases the pain of the process, as then there is no option to be just satisfied …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2023-10-19, 01:02

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

Just as an additional warning; very low ESR polymer capacitors did require also modifying the Chipset / RAM regulator compensation loop to have optimal voltage regulation, so I would not recommend for anyone else to use solid polymers to fully recap the board, unless actually understanding …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2023-10-18, 18:24

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

Hello, new on forums, I have same board,gonna need recap alot capacitators, mainly below agp slot, worked sometimes, but not anymore. Gonna Use it with some dos games and windows 98 games. Going to put ati radeon 9800 pro in it, if it works and have some duron cpu, dont have compound so cant check …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2023-09-30, 20:33

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

Also doing pointless DMA access cycless with a pci card, if it is a bus master, could slow the system down as the CPU won't have access to the RAM immediately every time it needs to. Should incur significant additional penalty when the CPU has its caches disabled.

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2023-09-23, 20:52

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

Just for throwing some seeds around for some, perhaps dumb, ideas: Besides slowing down the CPU with multipliers, bus speed, and disabling L1 and L2 cache, I wonder if anyone has tried to somehow increase the RAM latencies to make the system slow down. At least in theory, isn't the next bottleneck …

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Re: Asrock 775Dual VSTA & Core4Dual thread

Posted on 2023-01-31, 22:29

by

by makechu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You simply need to make the Windows part of the DOS Audigy drivers work. Use the step #5 from this guide: https://www.vogons.org/viewtopic.php?t=71449 Notice the double-device-one-is-not-initialized-the-other-one-added-manualy-and-works shenanigans. That's paramount. All right. I actually followed …

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Re: Asrock 775Dual VSTA & Core4Dual thread

Posted on 2023-01-30, 19:44

by

by makechu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for the tips. Solved the issue of not being able to boot to MS-DOS. Unfortunately, even HimemX did not solve one other issue with EMM386, which somehow fails to give enough RAM for SBEINIT to initialize Audigy 2 ZS for DOS. The error was something like "could not allocate code/patch RAM", …

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Re: Asrock 775Dual VSTA & Core4Dual thread

Posted on 2023-01-29, 16:15

by

by makechu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I am trying to free some resources in BIOS (mainly IRQs), by disabling floppy controller, serial, and parallel ports. However, disabling the parallel port seems to lock up the computer just after the BIOS post screen, before any text has been put out by Windows 98 SE command.com... I am wondering is …

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Re: Asrock 775Dual VSTA & Core4Dual thread

Posted on 2023-01-20, 16:00

by

by makechu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Test ended. Results: Core 2 Quad Q6600 Revision G0: Worked perfectly as its B3 revision twin. After that, I tried Q6700 (It has only revision G0) and Q6700 is worked perfectly. Core 2 Quad Q8400: Not working in 775DUAL-VSTA. It's not BIOS issue. This motherboard not supporting 1333 FSB CPU's. Its …

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Re: Asrock 775Dual VSTA & Core4Dual thread

Posted on 2023-01-17, 16:17

by

by makechu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi guys today finally have in hands a 4coredual-sata2 R2.0 with original box and stuff :D i was wondering if any of u have a guide, advice or something in order to make a full recap job on this mobo, the caps (especially KZG ones) in the vrm area is not good quality, and maybe can i fill the vrm …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2022-11-26, 23:00

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

Interesting, but have you tried pinmoding and/or modding the L bridges on a Barton though? No, but I did try Thorton as well with modified L3 bridges on my KT133, and it did not work at any multiplier I tried, above or below the officially supported 12.5x that KT133 should typically be able to …

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Re: Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Posted on 2022-11-25, 23:14

by

by makechu

in Marvin \ System Specs

in Marvin \ System Specs

Interesting. This means that at least Palominos can definitely work on a normal KT133 mb, but with reduced speed. On a side note, there are some special low voltage Athlon XP Palominos, called Athlon SFF. They have lower voltage from regular Palomino and consume even less power, but even those are …

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