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Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-15, 13:22

Here's the app, it's a very simple one but should do the job. It finds a ROM extension by the signature, makes sure the size byte is sane and then runs 1024 passes of checksum calculation. This might take a minute or two on slower machines. The app will abort earlier if something isn't right, and …

Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-12, 23:59

Bad news is that I can't get the IDE port on the Vibra 16 to play nicely. xtidecfg never detects it, and even when I manually configured it in xtidecfg with the same settings as I jumpered, the XT-IDE BIOS never detected the HDD on that port. Good news is the XT-IDE BIOS takes the place of EZ-BIOS. …

Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-12, 23:13

Slightly OT: BTW that bad graphics card, that looks like a bad memory chip. If these are socketed, try swapping them around - if it's just bad contact it'll go away, if bad chip it'll change the pattern. It might be possible to figure out which chip it is and replace it. Soldered ones are obviously …

Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-12, 22:55

Stop the press! I just used xtidecfg to write a BIOS in-system, and it booted from it! The only thing I did differently was that before hitting ENTER at the reboot prompt, I reached inside the computer and flipped the WR switch to OFF (write protect). And I just used the TL866A to confirm that the …

Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-12, 22:03

To catch up on things that I was asked to try... But that is not why the XTIDE ROM is not detected. Do you use EEPROMs without software data protection or did you disable SDP when flashing with xtidecfg.com? If that is the case, then you need to enable the write protect jumper or DIP switch on the …

Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-12, 21:35

What's the speed rating of your EEPROMs? The new EEPROMS I got are marked 150ns. They have obviously been remarked (it's so obvious I don't need acetone to confirm), so there's no telling if they actually are 150ns parts... The old EEPROM was also 150ns. It looks like it might have been an original …

Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-12, 21:19

Deunan wrote on 2022-02-12, 20:44: Anyway, I forgot to ask, what capture method are you using to produce these nice screenshots? I have the VGA output going to my VisionAV-HD capture card, and I'm just using the included Vision Window program to capture a still image of the screen.

Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-12, 21:13

Winner, winner, chicken dinner! XT-IDE Lives.PNG Apparently the issue was with how I was programming the BIOS, but I don't think I did anything that someone else might not try: I was using the xtidecfg program to write images to the XT-IDE, and I was using Lo-tech's flash program to write images to …

Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-12, 20:24

I hope you fellow Vogons didn't think I had forgotten about you... but I received the "New" AT28C64B's from Amazon (and they were every bit of a hot mess as the reviews indicated). Four were not blank and one arrived with a broken GND pin. Any other year, and I would have already started the return …

Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-11, 05:11

Unlikely...but maybe jdmcs can check: debug d c000:0 q I decrypted the whole image and the only text I see is: 386sx-BIOS (C) 1989 American Megatrends Inc. (C) 1991 Emerson Computer Corp. The BIOS-ID string is still unvisible...maybe it uses another encryption method. Dont know why AMI did this. …

Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-09, 13:58

this is normal for jdmcs since he uses a XTIDECF card Yes. I tried the ide_386l.bin on the XF-CF Lite since it had a 32K flash ROM. I think the saved ide_386.bin was the one I used on the XT-IDE Rev. 4, as I only had the one 28C64B. I was trying to use the defaults on both cards as they did not …

Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-09, 03:03

What about the checksum of your XT-IDE image? Can you upload a copy please? Edited because I misread your post with the system BIOS to try and indicated the wrong type of chip I need to order... I can give you the 386 images I was using, because I saved them to disk. I didn't save the AT image …

Re: My Emerson Elite SX386/16 Needs a New BIOS, But I Have Incomplete and Confusing Information About the Chipset and BI

Posted on 2022-02-08, 02:38

Maybe the flash is corrupt. Where in CV are you? I'm in Lexington, work in Lynchburg... I'm just north of Charlottesville. Actually, one of the pins just broke off of the AT28C64B that was in the XT-IDE, which I had pulled to erase so I could try another image. I have no spares and don't feel like …

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