Re: Octek Rhino 9 (430HX)

Posted on 2024-04-13, 16:28

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi oh2ftu, I also looked into the BIOSes for your Octek Rhino 9 board and this what I found: • The latest official 97-017 BIOS does doesn’t have the Int 13h extensions and that is causing the 8GB HDD limit you found. • The nice April 1998 Evaluation BIOS from majestyk has the Int 13h extensions, but …

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Re: Chicony CH-471B PIO issues

Posted on 2024-04-11, 14:25

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Marco, On my CH-471B Rev 1.0 I’m using this line in CONFIG.SYS: DEVICE=ADI2C149.SYS initonly The “initonly” switch initializes the ADI/2 timing registers for the maximum PIO mode of your HDD, without loading this DOS I/O driver in memory. Works fine here with Win95. During boot I see this message …

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

Posted on 2024-04-05, 14:11

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Was the k6-3+ with no cache cpu id added? Hi Sphere, Okay, you are referring to our earlier discussion at https://www.vogons.org/viewtopic.php?p=1141563#p1141563 No, the 05CCh/05C8h CPUID of the K6-2+/K6-III+ with disabled on-die L2 cache is not yet added, but it is on the list for the next CHKCPU …

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Re: IDT Winchip 2A PR266 a.k.a "Weirdo"

Posted on 2024-03-24, 17:47

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Btw, is 2.2v cyrix detection working? What about 2.0v rise? Hi Sphere, Looking at the Cyrix 6x86 support in this jumperless QDI IB+ BIOS, I see a 3.4V default for the original single voltage Cx6x86, 2.8V Vcore for the dual-voltage Cx6x86L, and 2.9V Vcore for the 6x86MX. So no 2.2V support for the …

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Re: IDT Winchip 2A PR266 a.k.a "Weirdo"

Posted on 2024-03-23, 14:36

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is it maybe possible to make board think that Tillamook is an AMD K6-2+? Probably not... Although this would fix the low Vcore for the Tillamook, this is not a good idea. Intel and AMD CPUs have a different set of Machine Specific Registers to enable and configure their various features. So when …

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Re: IDT Winchip 2A PR266 a.k.a "Weirdo"

Posted on 2024-03-22, 21:37

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

"CPU protection against a too high Vcore, to include the K6-III/K6-2+/K6-III+ models" - so it would just shutdown? 2.8V is the minimum voltage that is now possible? Because the motherboard hardware can generate Vcore voltages from 2.0V to 3.5V, a BIOS corruption could damage a CPU by inadvertently …

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Re: IDT Winchip 2A PR266 a.k.a "Weirdo"

Posted on 2024-03-22, 20:24

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi all, I received several requests for changes to the QDI Titanium IB+ BIOS. So I have been working on a patch J.3 BIOS update for this jumperless board, and I made some progress. @JustJulião, I was able to add IDT WinChip 2/2A/2B support. The new BIOS now properly detects these IDT models and …

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Re: IDT Winchip 2A PR266 a.k.a "Weirdo"

Posted on 2024-02-27, 18:24

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A note about supported multipliers of tillamook 1.5x is mapped to 3.5 2x while not shown in datasheet does indeed work and is present 2.5x I recall working 3x I recall working 3.5x works 4x works 4.5x exists but rarely works 5x exists only so far in intel documentation, it is possible it may show …

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Re: IDT Winchip 2A PR266 a.k.a "Weirdo"

Posted on 2024-02-27, 12:55

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi all, I received several requests for changes to the QDI Titanium IB+ BIOS. So I have been working on a patch J.3 BIOS update for this jumperless board, and I made some progress. @JustJulião, I was able to add IDT WinChip 2/2A/2B support. The new BIOS now properly detects these IDT models and …

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Re: Help identifying this 486 VLB mainboard (Path III)

Posted on 2024-02-26, 16:15

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi IkeFox, Nice Socket 3 board with both VLB and PCI slots! On your BIOS Setup pages, I see a 2A4KCM03 Award BIOS-ID. This points to a motherboard from Matra with an ALi M1439/31/45 (486 VLB/PCI/ISA) chipset. There is only one board by Matra on TheRetroWeb (Matra 486SLC2 VESA), but it’s not your …

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Re: DIY Bios Modding guide Jan Steunebrink k6-2+/3+ 128gb

Posted on 2024-02-22, 20:45

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Jan, when do we get the next episode? :p Hi Sphere478, Yes, the plan to continue with this BIOS modding guide keeps being derailed by life events. ;) But I have now notes on paper about what I want to tell in the coming 2 episodes. There I will explain in detail how to handle the compressed Award …

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Re: DIY Bios Modding guide Jan Steunebrink k6-2+/3+ 128gb

Posted on 2024-02-22, 20:15

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This is an awesome guide and very interesting. Been messing around with MODBIN and a hex editor.. Think you could help me with my modification of an 85C471 board here? https://www.vogons.org/viewtopic.php?f=46&t=98929 I wish to set chipset register 50, bit 2, to 1, during RAM initialization, to …

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Re: IDT Winchip 2A PR266 a.k.a "Weirdo"

Posted on 2024-02-17, 10:18

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for the kind words guys. :) Over the years I devoted a lot of my spare time to this Socket 7 BIOS patching project, and it’s nice to hear it is appreciated! Well, assuming the 75 MHz is correct (which is plausible) and the 250 is also correct, it would imply a 3.33 multiplier, which most …

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Re: IDT Winchip 2a PR266 a.k.a "Weirdo"

Posted on 2024-02-15, 18:54

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, shoo. Seems like something went wrong during my copy/pasting. Anyway the link H3nrik V! posted, https://www.pchardwarelinks.com/cpuspeed.htm definitly has it correct. ah yes, I see it. I tripped over the 1.5x being in the same column as 3.5x. Correction 5.0x 2.5x 5.5x 3.0x 2.0x 1.5x/3.5x 4.0x …

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Re: IDT Winchip 2a PR266 a.k.a "Weirdo"

Posted on 2024-02-15, 16:48

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, the link I posted, mentions a lot of non-integer multipliers, and the photo in the original post also shows 2.33 written on the actual cpu in question? Well the link you posted has a nice table, including a reference to the winchip-2A setting the multiplier to 5.0x 2.5x 5.5x 3.0x 2.0x 1.5x 3. …

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

Posted on 2024-02-08, 19:09

by

by Chkcpu

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, 12:46

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Curious about this possibly fake L2 cache case, I’ve looked at the available BIOSes for this board on TheRetroWeb. The https://theretroweb.com/motherboards/s/u-board-st1a-rev-semicolon-b#bios page lists 2 BIOSes that have the same date. A 03/20/96-UMC-881/886A-2A4X5U03C-00 and a 03/20/96-UMC-881/ …

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Re: Help me find the best storage option for my Socket7 - Intel Pentium MMX build

Posted on 2024-02-05, 19:04

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, Jan! Thank you very much for the new BIOS patched version for Shuttle HOT-596 A mobo! I'll give my best to test it tomorrow with some different s7 CPUs and at least two "big" (80 and 250 GB) mechanical ATA HDDs. I've sent you a PM. Thanks for your elaborate test reports on the HOT-569 A patch …

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Re: Help me find the best storage option for my Socket7 - Intel Pentium MMX build

Posted on 2024-01-26, 16:28

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'll gladly test your newer patched BIOS version for Shuttle HOT-596A board when it's ready. Hi analog_programmer, The new HOT-569A patch J.3 BIOS version is ready and I sent you a download link via PM. Please let us know how this new BIOS works. P.S. Some stupid question: If your HDD volume …

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Re: Bios Update, but how do I identify which one I got?

Posted on 2024-01-22, 15:48

by

by Chkcpu

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Do you know if the BIOS Update might also have changed some of the available BIOS options? I looked into using the slowdown tool discussed here: https://www.vogons.org/viewtopic.php?p=1224622#p1224622 But it does not work. As my BIOS Options also don't exactly match what I can find in the manual I …

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