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Re: HWiNFO for DOS resurrected !

Posted on 2021-10-18, 20:27

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks. Could you please try to capture the problem in DBG file? Just run with -d switch and walk manually thru the screens until it crashes. That should tell me where exactly it happened. Today I ran other tests on the 386DX but with a different CF, 512MB. In practice I did a couple of tests, one …

Re: Coprocessors for the AMD 386DX 40MHz CPU

Posted on 2021-10-17, 09:24

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Jo22 wrote on 2021-10-17, 08:54: You're welcome. ^^ Before I got real FPUs, I used the humble EMUL87 on a 286/386. Yes the one I used was called EM87 if I remember correctly, it was fine on 286 and 386 (DX included), while it didn't work on the 486SX, and in fact it was, I tried it on a 486SX but …

Re: HWiNFO for DOS resurrected !

Posted on 2021-10-17, 09:15

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks. Could you please try to capture the problem in DBG file? Just run with -d switch and walk manually thru the screens until it crashes. That should tell me where exactly it happened. Yes as soon as I can I try, however it is that screen in the picture where there are some lines, in practice …

Re: HWiNFO for DOS resurrected !

Posted on 2021-10-17, 08:01

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Reducing the smartdrv buffer size will free additional Extended Memory, but not System Memory, so I don't think that will help. HWiNFO should be OK with ~850KB of Extended Memory for non-PCI systems. After several attempts I realized that the problem is memory. Trying to remove the loading of …

Re: Coprocessors for the AMD 386DX 40MHz CPU

Posted on 2021-10-16, 21:51

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ah, I see. Makes sense to me. Speaking of FPU/NPU emulators, the "Franke 387" emulator was very sophisticated. Or so I heard. In Germany, there was a lot of advertising for that FPU emulator back in the late 80s/early 90s. http://icfs.de/franke387.html Thanks this is very interesting. I used …

Re: Coprocessors for the AMD 386DX 40MHz CPU

Posted on 2021-10-15, 20:50

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I often pick up IIT 3C87s because they're still kinda, sorta cheap-ish compared to other FPUs of their speed range. I know they're not the fastest but raw FPU speed is all but irrelevant for a 387 in this day and age. :P CHIPS SuperMATH and Cyrix FasMaths are by any measure the fastest "real" 387s …

Re: Coprocessors for the AMD 386DX 40MHz CPU

Posted on 2021-10-15, 20:37

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You do realise it was popular for 386 owners to install Cyrix Fasmath for several years before the DLC even existed, right? Cyrix is the FPU to use regardless of which CPU you have. Yes of course the cyrix should be the right fpu for the 386. Strangely there is no amd 387. The speech I was making …

Re: Compact Flash as a hard drive...cant boot why ?

Posted on 2021-10-15, 20:30

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

After that success ...I'll finish off by uploading a couple of photos of the SOYO in my new mobo test bench...now complete. Very useful for tackling problems ..with access. fitted with 40 nylon M3 standoffs that can be left in place with any mobo ..and no risk of shorting anything out. A worthy …

Re: Compact Flash as a hard drive...cant boot why ?

Posted on 2021-10-14, 21:59

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've had CF cards that the correct settings are not detected by an older computer. Hook it up to a newer computer and it will detect the correct settings. You can then manually enter the correct settings in the BIOS of the old computer and the card "magically" starts working as expected. I have not …

Re: Compact Flash as a hard drive...cant boot why ?

Posted on 2021-10-14, 21:48

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Why is it that some CF cards do not boot ? I have a 512mb and a 1gb CF .. I have successfully got DOS on the 512 which boots no problem.. The Transcend 1GB refuses to boot even though the DOS files were written to it successfully.. I also tried creating an active partition on this CF card ...and …

Coprocessors for the AMD 386DX 40MHz CPU

Posted on 2021-10-14, 21:18

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I return to a discussion of some time ago, on coprocessors for the 386DX CPU. Currently I have two MB with AMD 386DX-40 CPU, one without L2 cache and with Intel 387 16-33MHz coprocessor (but which goes synchronous ie at 40MHz), the other has 128KB of L2 cache and is without coprocessor. I thought …

Re: What retro activity did you get up to today?

Posted on 2021-10-13, 19:50

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I noticed that at startup the 128KB of cache are detected, but the QuicktechPRO diagnostic program does not detect them, maybe there is some program that can detect if the chips are real, or are they fake (like in some MB 486 PCChips)? Perhaps you try SpeedSys 4.78 You can see the amount of cache …

Re: HWiNFO for DOS resurrected !

Posted on 2021-10-12, 21:44

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You could remove the mouse.sys driver if you can live without mouse for a while and smartdrv.sys, which is a disk cache. Ok thanks, tomorrow night I'll try, and let's see what happens, I hope it's enough to free the bytes needed for operation. Perhaps by chance it affects the amount of RAM of only …

Re: HWiNFO for DOS resurrected !

Posted on 2021-10-12, 21:18

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sure, I'm interested :) Thanks in advance. Hi, I am currently working on the 386dx-40, for the moment the PC configuration has remained the same, I have not added any more RAM, but I am installing various software on a larger 128MB CF (instead of the 8MB one). I have installed a version of your …

Re: What retro activity did you get up to today?

Posted on 2021-10-12, 21:04

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today 3.5 "floppy marathon, I have recovered more than twenty, three are now irrecoverable, another 8 have some defective sectors (minimum 1), and fifteen are perfect. I used eight of them to recreate the Word 2.0 floppies, and then install it in the 386DX with 128MB CF (SanDisk), in the past few …

Re: HWiNFO for DOS resurrected !

Posted on 2021-10-12, 20:43

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Great :) Thanks for the new test and results! You're welcome. At the moment I am working on PC 386 and P60, as soon as I finish installing the software, I will try to switch to more modern PCs (relatively), let's say early 2000s, then pentium and Athlon, all with frequency around the GHz maximum, …

Re: Time to ask before I do some damage Gigabyte GA-486VF rev7

Posted on 2021-10-12, 20:22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Another MB I worked on long ago is here: Re: Identify motherboard Slot 1 SIS chipset I'll try to review it shortly to see if I can solve it

Re: Time to ask before I do some damage Gigabyte GA-486VF rev7

Posted on 2021-10-12, 20:15

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So ..working on the assumption my reasoning was sound...I re-watched Necrowares youtube video pausing on closeups of the board... His video confirmed my assumptions...so copied his jumper settings.. Looks good for 256k external cache. First I wanted to congratulate you on the excellent work, I …

Re: What retro activity did you get up to today?

Posted on 2021-10-11, 21:10

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I continue to make progress with retro-PCs, right now I have created 3.5 "boot disks, containing an old version of DOS 3.30, which I have transferred to the 8MB CF, before I had ver. 4.01 but Windows 1.03 did not work, while under DOS 3.30 it does. In Windows 1.03 I have Write not working, but I …

Re: HWiNFO for DOS resurrected !

Posted on 2021-10-10, 21:33

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I tried the latest version of the program, and on the P60 it works fine, that is, it doesn't crash. I think it is quite similar to the previous one that I have used so far, I would not want to have to restart the PCs where I had tried the ver. 6.1.4 Of course I did recreate the files I attach. In …

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