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

Posted on 2023-11-15, 17:06

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 …

Re: KT7A missing IC

Posted on 2023-11-12, 16:06

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you very much! Then I assume that the 10k is correct here.

Re: KT7A missing IC

Posted on 2023-11-08, 21:31

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you and yes, theo are. I also no longer rule out the CPU . I have a TBred mobile here. I'll try it with a Thunderbird and see if anything changes…

Re: KT7A missing IC

Posted on 2023-11-05, 20:35

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So, I have now tested a little more extensively. And the reason seems to be completely different. It turns out that the system runs 100% stable and there are no keyboard or mouse dropouts as long as the fsb is running at 100 MHz. If I set the board to 133 MHz fsb, I get mouse and keyboard dropouts …

Re: KT7A missing IC

Posted on 2023-11-03, 12:21

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The fuses seem to be OK. I checked the lines with an oscilloscope and found out that the data line drops from a clean 5 V to a noisy 1.6 V after a few minutes. However, the clock line remains clean. I suspect a capacitor array to ground.

Re: KT7A missing IC

Posted on 2023-10-29, 21:42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Unfortunately not, it is all included in the south bridge. But BGA reflowing is always a thing… Will try to check the lanes and passives first.

Re: KT7A missing IC

Posted on 2023-10-29, 09:33

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As you said snufkin, it was actually not the FET at the Ram slots, but a torn resistor next to the clock IC! But either way everything is done and the board is now running again! However, I'm still not completely worry-free... After some time, so about an hour of operation, mouse and keyboard say …

Re: KT7A missing IC

Posted on 2023-10-10, 15:16

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you shamino that is quite sufficient! I have already ordered a replacement. I'll get back as soon as the IC has been soldered!

Re: KT7A missing IC

Posted on 2023-10-07, 22:16

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you very much! IC is ordered and here is the picture of Q24. It's labeled with 702v5. Is it an N channel MosFET? ...and yes, the pad is missing. But I think I can fix that quite well.

KT7A missing IC

Posted on 2023-10-07, 12:34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got an not booting Abit KT7A board with missing IC. Could one of you KT7/KT7A owners check what U14 (see picture) is for an IC, or send me a close up of it?

Re: Help needed! Looking for high res pics of a fsc d1219 board!

Posted on 2023-06-06, 13:59

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In the hope that someone here can help me, I will bring this thread back to life. Unfortunately, more components seem to be missing. As far as described above, everything worked perfectly. However, data lines of the PCI bus are too connected to the ISA bridge chip. So far so good. However, these are …

Re: Help needed! Looking for high res pics of a fsc d1219 board!

Posted on 2023-04-21, 09:58

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you guys! I also got some other pictures from Ebay sellers and was able to identify all the parts. For those who are interested, here is the complete list, from left to right: 1: TO-220: 7905C 2x Ceramic: 100pF tantal big: 100uF 10V (107A) tantal small: 10uF 25V (106E) 2: ceramic: 100pF 3x …

Help needed! Looking for high res pics of a fsc d1219 board!

Posted on 2023-04-20, 09:25

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got my hands on a fsc d1219. It is an i815ep board, which theoretically also has an ISA slot. The board has all the solder pads for it, unfortunately they are not populated. I would now like to start a small project to find all the components and populate the board. Unfortunately, I can't find any …

Re: START HERE SoftMPU 1.91 - Software Intelligent MPU-401 Emulator

Posted on 2020-11-30, 14:54

in SoftMPU

in SoftMPU

A question regarding a ymf744 card. The card works fine in DDMA mode together with a SIS963 Southbrige. But as soon as I start SoftMPU, the system freezes. Any ideas?

Re: PCI sound cards and Chipsets from various manufacturers...

Posted on 2020-11-30, 14:45

in Marvin \ Sound

in Marvin \ Sound

Quick question to the ESS Solo1 Cards. What are the correct PCISET settings to run the card in DDMA mode? Which values must be given for base address and count? Copy code to clipboard 1 pciset 1969 125D 61 11111111 00000000 2 pciset 1969 125D 60 11110001 00000000

Re: Voodoo 3/5 PCI Post Write Artifacts

Posted on 2020-10-02, 10:26

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks Oetker, this is exactly my prolem! In the meantime I found the posts here in the forum... https://www.vogons.org/viewtopic.php?f=46&t=42087 https://www.vogons.org/viewtopic.php?f=46&t=46130 The Windows GUI is not affected, the artifacts just appear in Unreal menues, which I think uses a …

Re: Voodoo 3 PCI and PCI Post Write

Posted on 2020-10-01, 15:02

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi again! Now that I have tested some more things, there are new discoveries. After I got the artifacts described above with my Voodoo 3000 PCI, I had the opportunity to test a V5500 PCI. With exactly the same result! Am I missing something here, or do Voodoo PCI cards in general have problems with …

Re: MIDI Tx Level on Soundblaster PCI Gameport

Posted on 2020-08-09, 20:04

in Marvin \ Sound

in Marvin \ Sound

The TTL MIDI signals of your sound cards game port should be buffered to ensure that you get enough current to power the LED in the optoisolator on your MIDI device. Here's an example of a proper adapter using a buffer chip. I finally found the time to build an adapter according to this schematic. …

Re: Voodoo 3 PCI and PCI Post Write

Posted on 2020-08-09, 19:42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Okay, I see. Thanks for clearing that up. Unfortunately none of the boards available to me provide these options in the bios. Got here: Asus 8AV-MX (K8M800/VT8251) Asrock 939A8X-M (ULI 1689) MSI 7075 (K8T800 Pro/VT8237) I would prefer to use one of the first two, as they do not suffer from the SATA …

Voodoo 3/5 PCI Post Write Artifacts

Posted on 2020-08-09, 14:05

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello everybody! I am trying to build a modern retro gaming PC. The base is supposed to be an Athlon 64 system. Since I still have a Voodoo 3 3000 PCI lying around here and DOS/Windows is my goal for the time being, I wanted to use the card in the system. However, I came across a strange problem …

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