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Re: Need Help Azza PT-5VMX Motherboard BIOS

Posted on 2023-02-28, 13:58

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi TimWolf, Just use the 07/04/2000 BIOS from https://theretroweb.com/motherboards/s/azza-5vmx-pt-5vmx#downloads I’ve checked this BIOS and it has full K6-2+/K6-III+ support, and also supports drives up to 128 GiB. :) Note that a K6-III+ will be indicated as an AMD K6-III CPU. This is true for all …

Re: Confused about CPU Speed, Multiplyer and Cache K6 2/2+/3+

Posted on 2023-02-18, 18:57

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just found another K6-2+/570 L2 cache mod video at https://www.youtube.com/watch?v=MFKW55fzDNk At time index 7:40 you can see a 05CC CPUID when the L2 is disabled! Curious, Jan Oh, I think I see what’s going on here. In Fritzchens Fritz example, the 128KB -> 256KB L2 cache mod was already done when …

Re: Confused about CPU Speed, Multiplyer and Cache K6 2/2+/3+

Posted on 2023-02-18, 18:32

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

K6-III Model 9, CPUID 0590, 250nm, 2.4V (has the x2 -> x6 multiplier remap) I just noted SIV thinks it's 2.2V rather than 2.4V and https://en.wikipedia.org/wiki/List_of_AMD_K6_processors#K6-III_(Model_9,_K6-III,_250_nm) also says 2.2V , which do you think is correct? Most regular K6-III CPUs were …

Re: Confused about CPU Speed, Multiplyer and Cache K6 2/2+/3+

Posted on 2023-02-18, 17:08

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just found another K6-2+/570 L2 cache mod video at https://www.youtube.com/watch?v=MFKW55fzDNk At time index 7:40 you can see a 05CC CPUID when the L2 is disabled! Curious, Jan

Re: Confused about CPU Speed, Multiplyer and Cache K6 2/2+/3+

Posted on 2023-02-18, 16:30

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

And now a K6-2 Model 12 (C), CPUID 05C8, 180nm, 2.0V was created! Most interesting, can you post a CPUZ save file from one please? I wonder what CPUID 80000002/3/4 will report. Hi red-ray, Fritz did this K6-2+ L2 cache disable mod and showed a picture of your SIV program and CPU-Z at https://www. …

Re: Help to identify 486 motherboard.

Posted on 2023-02-18, 16:09

in Marvin \ System Specs

in Marvin \ System Specs

Hi barry07, This Abit AB-PM4 looks like a great board for the Am5x86-P75. However, finding the correct jumper settings and a BIOS that supports this CPU will be a challenge. ;) The manual at https://theretroweb.com/motherboards/s/abit-ab-pm4t-rev.-1.0#downloads for the practically identical AB-PM4T …

Re: Confused about CPU Speed, Multiplyer and Cache K6 2/2+/3+

Posted on 2023-02-16, 20:23

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Kordanor, I made the CHKCPU utility to have an independent check on the CPU speed, and the FSB and multiplier settings, so CHKCPU is only using data directly from the CPU and doesn’t use any BIOS data. Yes, you definitely have a regular K6-2, but with the improved Chomper core. That is why …

Re: SIS 486G 3.3/5V Ver.G Motherboard - Some questions

Posted on 2023-02-14, 17:49

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi tauro, Yes, there is a lot of contradicting jumper information out there for this board. But I agree that your issues should go away with the correct jumper settings. I found another set of jumper settings for your SiS 486G 3.3/5V board at https://www.elhvb.com/webhq/models/486vlb3/sis471g.txt. …

Re: SIS 486G 3.3/5V Ver.G Motherboard - Some questions

Posted on 2023-02-13, 18:59

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@Deksor Thanks for putting the 486G_J1 BIOS up at The Retro Web. Although the BIOS has been tested on an earlier revision of the Full Yes SiS 486G 3.3/5V board, I'm confident it will work on the Rev:G/H revisions as well. @tauro When you are able to try the 486G_J1 BIOS on your Rev:H board, please …

Re: SIS 486G 3.3/5V Ver.G Motherboard - Some questions

Posted on 2023-02-13, 14:22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is the mobo same as this: https://www.vogons.org/viewtopic.php?f=46&t=84585 There's great BIOS for that. @dj_pirtu Although the QDI V4S471/G is a bit different than the Full Yes 486G 3.3/5V board, using a more recent SiS471 BIOS is a good idea and may actually work. Transplanting a BIOS from …

Re: Confused about CPU Speed, Multiplyer and Cache K6 2/2+/3+

Posted on 2023-02-11, 15:13

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Kordanor, I made the CHKCPU utility to have an independent check on the CPU speed, and the FSB and multiplier settings, so CHKCPU is only using data directly from the CPU and doesn’t use any BIOS data. Yes, you definitely have a regular K6-2, but with the improved Chomper eXTended core. That is …

Re: CPU Identification tool CHKCPU, 25th anniversary 'Retro' update - Released!

Posted on 2023-02-02, 10:45

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

After releasing CHKCPU v1.27 final last December, a bug was brought to my attention. In Real mode DOS all is fine, but when using a memory manager like EMM386, so the CPU is running in Virtual86 mode, this bug could hang the PC with an EMM386 error when CHKCPU was run on a 386 or 486 CPU without …

Re: Question about Normal and LBA bios setting

Posted on 2023-01-21, 22:26

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Robin4 If you want to read up on the theory behind these BIOS limits, I wrote a "The BIOS IDE Harddisk Limitations" article back in 1999. It is still available at: http://www.steunebrink.info/bioslim.htm You will need a BIOS from 1998 or later to find the Int 13h extensions nessary to break the …

Re: QDI Titanium IIB. v2.0 and AMD K6-III+

Posted on 2023-01-16, 18:57

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi ederra, Thank you for the detailed testing and extensive reports. This is exactly what I needed! :) Great that your K6-III+/400 is running fine, and selecting 2.0V Vcore is no problem. About storage, looks good as well but I have no idea why the passive adapter blocks the secondary IDE channel …

Re: Need help setting up AMD K6 cpu with Newtech VX3-2b motherboard for Socket 7 build

Posted on 2023-01-13, 21:07

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Chkcpu. Thank you for your helpful reply. - For the JP6 jumper; assuming it is for selecting DIMM voltage, would it's use be relevant when using either EDO or SDRAM? Would the jumper need to be absent or present when using either type of ram? From your motherboard picture, I see a 3-pin header …

Re: Need help setting up AMD K6 cpu with Newtech VX3-2b motherboard for Socket 7 build

Posted on 2023-01-12, 19:26

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi DarkHollow, Welcome to Vogons! I will try to help you with the jumper settings on this nice i430VX board. - Voltage Configuration (VID0-VID4) is correctly set to 2.9V Vcore. - Single/Dual Voltage Configuration (JP10) needs to be set to Dual Voltage CPU, so remove the jumper on JP10. The AMD K6 is …

Re: 486 freezes? when booting from disk

Posted on 2023-01-12, 16:14

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Stefan, Great to hear that my L1 cache WB idea paid off! :) I was about to suggest a BIOS update when I saw you today message. Yeah, the VT498G chipset has support for L1 cache WB and I'm glad a BIOS update fixed it. You choose the version 115c701 BIOS, but have you seen https://www.vogons.org/ …

Re: 486 freezes? when booting from disk

Posted on 2023-01-11, 18:01

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Stefan, Great to hear that my L1 cache WB idea paid off! :) I was about to suggest a BIOS update when I saw you today message. Yeah, the VT498G chipset has support for L1 cache WB and I'm glad a BIOS update fixed it. You choose the version 115c701 BIOS, but have you seen https://www.vogons.org/ …

Re: 486 freezes? when booting from disk

Posted on 2023-01-10, 18:33

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi marbury, welcome to Vogons! Recently I had the exact same symptoms on another 486 board, using a Cyrix 486DX2-66 CPU. This CPU supports L1 cache in Write-Back mode and the problem went away when I used another CPU that has L1 cache Write-Through support only. Later I found an error in the jumper …

Re: PC Chips M912 / DX4-100 and Write-Back L1 Cache

Posted on 2022-12-24, 21:47

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Okay, you got the CPU in L1 cache WB mode, great! :) Yes, it is true that Write-Back capable Intel and AMD 486 CPUs will change their CPUID Signature depending on the L1 cache mode. CHKCPU knows these CPUID values and translates them in readable English for the L1 cache mode display. Note that Cyrix …

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