Re: Do I have a cache problem or not? New board with Cx5x86.

Posted on 2024-02-09, 18:20

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

by Chkcpu analysis: >Apart from this extra routine, these BIOSes are identical. you wont gain anything by flashing official bios That's what I wanted to say, too. Complete overkill to get a programmer and buy a new chip in this case. Changing to the official BIOS does not hurt is true, but only if …

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Re: Do I have a cache problem or not? New board with Cx5x86.

Posted on 2024-02-09, 14:20

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

WOW Great find, thank you. Mine is "2A4X5000C"...So it is fake...What happens if I change the bios? Does it boot? Later I'll change the chips. Changing to the official BIOS does not hurt. Of course the message "256KB Cache" during boot will disappear as long as no cache is installed, but the …

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Re: Do I have a cache problem or not? New board with Cx5x86.

Posted on 2024-02-08, 17:04

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Intel486dx33 wrote on 2024-02-08, 15:38: I would not worry about motherboard cache. As long as you have 64kb thats fine. 256kb or 512kb of cache will only get you about […] Show full quote I would not worry about motherboard cache. As long as you have 64kb thats fine. 256kb or 512kb of cache will …

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Re: Do I have a cache problem or not? New board with Cx5x86.

Posted on 2024-02-08, 14:33

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

WOW Great find, thank you. Mine is "2A4X5000C"...So it is fake...What happens if I change the bios? Does it boot? Later I'll change the chips.

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Re: Do I have a cache problem or not? New board with Cx5x86.

Posted on 2024-02-08, 09:54

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Obviously the Bios telling there is 256kB of cache, but there is none, is also a very strong hint for fake cache. There are other possibilities for this behaviour: The BIOS might correctly detect and initialize the L2 cache, and then intentionally disable it when it boots into DOS: For example, …

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Re: Do I have a cache problem or not? New board with Cx5x86.

Posted on 2024-02-08, 05:47

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Obviously the Bios telling there is 256kB of cache, but there is none, is also a very strong hint for fake cache. At bios it is enabled. 256K reported but it seems it is fake. I would like to buy a set of srams but almost all sellers do not offer tag-ram. I couldnt find on ebay. Maybe at least my …

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Do I have a cache problem or not? New board with Cx5x86.

Posted on 2024-02-07, 21:15

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This is a new configuration with a new board. It is reported that 256KB cache is installed. Jumper setting is ok. But look at speedsys...Sudden drop after 16K?? Cache control program in dosbench reported just 16K cache...

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Re: Found a Socket 3 board with AMD X5-133 but no information at all about jumper settings...

Posted on 2024-02-07, 18:23

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, settings work with the U-Board ST1A Manual.

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Re: Found a Socket 3 board with AMD X5-133 but no information at all about jumper settings...

Posted on 2024-02-07, 14:27

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It seems problem solved. The retroweb listes 1.U-Board ST1A rev:B and 2.U-Board JK-042E Mine has two names both on the board. Here are the picture of the board. And 1 has a jumper setting doc. I'll compare it with mine and inform you about it. Sent this info to retroweb. See the pics.

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Re: Found a Socket 3 board with AMD X5-133 but no information at all about jumper settings...

Posted on 2024-02-07, 13:53

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That board looks pretty much identical to this one which does have a jumper manual: https://theretroweb.com/motherboards/9881 As far as I can see it's exactly the same design, just a different colour PCB and here and there different passive components. The actives all look the same though and every …

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Found a Socket 3 board with AMD X5-133 but no information at all about jumper settings...

Posted on 2024-02-07, 09:32

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Will try the Cyrix 5x86-100GP on it but could not found any manual for this board. Anybody out there have a source of info? https://theretroweb.com/motherboards/s/u-board-jk-042e

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Re: Zida 5STX-J98 Rev 1.01 Mainboard with latest 2.6 Bios Problems

Posted on 2024-01-27, 20:03

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

At auto bios voltage setting can not be changed. Fixed at 2.8V but giving out 2.2V. Changed all 4 capacitors around the cpu but it didnt change anything. Flashed 2.0, 2.3 and 2.6 no change. There is smething wrong but I can not find.

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Re: 486UL-P101 486 board works with 30 pin 256Kx4 edorams but not working with 72 pin 4MB-8Mb EDORAMS or mixed configs.

Posted on 2024-01-25, 22:21

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Cleaned up the memory slots. Worked. In fact, it is working with every EDO chip memory I throw at it.

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Re: 486UL-P101 486 board works with 30 pin 256Kx4 edorams but not working with 72 pin 4MB-8Mb EDORAMS or mixed configs.

Posted on 2024-01-16, 21:56

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

CoffeeOne wrote on 2024-01-16, 21:43: 30 pin EDO RAM does not exist. OK, so what? Does it help me?

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486UL-P101 486 board works with 30 pin 256Kx4 edorams but not working with 72 pin 4MB-8Mb EDORAMS or mixed configs.

Posted on 2024-01-16, 21:38

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Found a new old stock 486 board printed 486UL-P101. It must be ECS or Chaintech. there are some variations out there with this board. Mine has a bank of 30 pin rams and 2 banks of 72 pin slots. Exactly this 486ul-p101.jpg Board boots with 4x256K 30 pin edos total of 1MB. But I couldnt make it boot …

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Re: Zida 5STX-J98 Rev 1.01 Mainboard with latest 2.6 Bios Problems

Posted on 2024-01-14, 10:43

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So if you rely on the automatic voltage recognition, it could be possible that it starts with a lower voltage, when with the P.MMX it starts at 125 MHz, this is normal, but if you switch to the jumpers manually, if you select for example 2.9V , you must have about 2.9V (+ or - 0.1V), does this tell …

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Re: Zida 5STX-J98 Rev 1.01 Mainboard with latest 2.6 Bios Problems

Posted on 2024-01-11, 19:59

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Some news here. I've looked at the output of VRM for every manual setting. Board gives approximately 0.7 volf below the setted voltage so set to 3.2 for Pentium MMX and booted and worked flawlessly at 2.6V. Bios version is 2.3. Set 2.9 for K6-2 as it should be 2.9 but output is 1.2V. It doesnt …

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Re: Zida 5STX-J98 Rev 1.01 Mainboard with latest 2.6 Bios Problems

Posted on 2024-01-10, 20:55

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Have you updated the BIOS? It is latest 2.6 bios. According to what Jan writes, if you have BIOS 2.6, P.MMX and K6 will not work, so you should install version 2.3, which has verified and should solve the boot failure problem. He also suggests using the K6-2 on manual settings, and if that works, I …

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Re: Zida 5STX-J98 Rev 1.01 Mainboard with latest 2.6 Bios Problems

Posted on 2024-01-10, 19:22

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Have you updated the BIOS? It is latest 2.6 bios. According to what Jan writes, if you have BIOS 2.6, P.MMX and K6 will not work, so you should install version 2.3, which has verified and should solve the boot failure problem. He also suggests using the K6-2 on manual settings, and if that works, I …

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Re: Zida 5STX-J98 Rev 1.01 Mainboard with latest 2.6 Bios Problems

Posted on 2024-01-10, 19:21

by

by fsinan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Mobo VRM IMG_6251.jpg PCI bios analyzer gives two codes one for award one for itself, I couldnt resolve correctly; IMG_6269.jpg IMG_6270.jpg I think about possibilities; 1.Mobo ver 1.01 does not support over 166Mhz 2.Jumper settings are different for this version. 3.Jumpers are faulty does not …

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