Included tags: BIOS ×
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Mega-Bios project - Release 1.0

VCFed about 3 months ago

Today we're announcing the first release of Mega-Bios. Yes, this is DTC's Mega-Bios, whose source listing was just recently uncovered by our very own FinnJorgensen! After a huge collaborative effort between FinnJorgensen, 640KB, and myself, we're happy to …
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[FS] PC Weasel 2000 ISA MDA to VT100/ANSI serial terminal

VCFed about 3 months ago

Card designed for remote access to a PC, including the Bios. Recognized as a MDA display adapter and use a serial terminal for input/output. Price: 175€ plus shipping. It's also on ebay. …

Text corruption after BIOS on internal LCD only, external display fine on Portable PC III (Orchid)

VCFed about 3 months ago

I have a Portable PC III by Orchid Systems - a 386 compaq portable III clone that takes a regular MB with a special video card for the LCD. Plugging in a VGA monitor, everything works fine - the initial BIOS boot screen, and then DOS afterwards. Using the …

is this right?

VCFed about 3 months ago

hi, this 486dx 66 is slow to post. takes a long time to test the floppy, if at all. if i hit the space bar and terminate the memory test as it is checking the ram size it will go to test floppy and the last post beep within a few seconds and will start lo …

NeoBiosMasta VMC Error "Memory card is write protected"

Neo Geo Forums about 3 months ago

Hello! I installed a clone Neo Bios Masta VMC into a Neo Geo MV-1C board. It loads games and Unibios 4.0 just fine, but it complains that the memory card is failing the hardware test and when I try and format it, it says "memory card is write protecte …

IBM PC, PCXT, Tandy 1000 • MiSTer PC XT BIOS

MISTerFPGA about 3 months ago

Here's my small contribution to this project:MiSTer PC XT BIOSIt's a fork of well known 8088_bios (https://github.com/skisele... PC XT related enhancements:Memory size set to 704KB. So if A000h UMB enabled, 704KB memory will be available to …

IBM PC, PCXT, Tandy 1000 • XT-IDE r625

MISTerFPGA about 3 months ago

Just received much awaited addons and start looking at MisterXT Looks like it's suggested BIOSes goes with quite old XT-IDE release, so i made a build of main and XT-IDE BIOS.Main BIOS is a quick port of Book8088 (chinese XT laptop) BIOS i'm working on, w …

Gigabyte GA-6VX7B-4X BIOS flash chip

VCFed about 3 months ago

Someone reflashed the BIOS on this board with an incorrect version. Is there somewhere I can buy a pre programmed replacement flash chip, i did fnd a place in europe a while back, but they refused to ship to Canada. Can anyone help me? The numbers on the …

NuXT 1.2, move 32K VGA ROM to either main flash chip or option ROM socket?

VCFed about 3 months ago

If I needed to clear up C0000-C8000 (location of SVGA bios on a NuXT 1.2) might it work to just move the chip over to the option ROM socket (and set it to D0000)? How about flashing it into the 32k free space in the flash chip used for the system BIOS (loc …
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Risks with trial-and-error testing RAM chips?

VCFed about 3 months ago

I recently bought a Baby AT 286 motherboard (OCTEK Fox II, rev 3.0) off eBay that I installed in my IBM 5160 case. * The motherboard looks like this: * The motherboard came equipped with no Dip RAM, but with two SIMM cards slotted in (one 1mb and o …

Need help wit BlueSCSI

VCFed about 3 months ago

Trying to figure out why my BlueSCSI is not working. (Not sure the version but it's an STM controller) Pentium 133 MoBo running Windows 98. Tried two different SCSI cards: Adaptec AHA-1510A(ISA) and AHA-2930 (PCI) The images are mounting ok according t …

Need help with BlueSCSI

VCFed about 3 months ago

Trying to figure out why my BlueSCSI is not working. (Not sure the version but it's an STM controller) Pentium 133 MoBo running Windows 98. Tried two different SCSI cards: Adaptec AHA-1510A(ISA) and AHA-2930 (PCI) The images are mounting ok according t …

XT-IDE AT/x86 version: Unable to configure ports and addresses?

VCFed about 3 months ago

Since I have my Compaq Portable III in easy working order again, I want to try using XT-IDE as a pair of option EPROMS (note the missing "E") in the extra chip sockets provided on its motherboard. (That is, if it has the capability to do so.) Th …

Comm Port Troubles GA-5486AL

VCFed about 3 months ago

Hi, I got this board: ... GA-5486AL G... GA-5486AL is a motherboard based on the ALi M1489/87 (FinALi-486 PCI Chipset) chipset. Get specs, BIOS, documentation and more! ... …

#2 5160 64-256k Motherboard memory question

VCFed about 3 months ago

I have built the dramduino tester and have gone through the memory on my 2nd 5160. I found 3 definitely bad chips. The (maybe) good ones were populated in banks 0 through 2 and the switches set to exclude bank 3. I have the Landmark diagnostic BIOS inst …

PC BIOS function int 21, 48

VCFed about 3 months ago

I tried using my own simple malloc by calling this bios function. Again in MS-DOS real mode. This bios function returns a 16 bit number and I don't really know if my code is correct to convert it to the actual address: Code:... _mallo …
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Book8088 V2 Internals

VCFed about 4 months ago

As my Book V2 arrived not working, i decided to do a quick photo session of it's internals. If you're thinking about getting one that might help you a bit. Main board, front: You can see a good example of "Not my job" here (but that's not the …

Compaq Ipaq 1801-Microcode Update Error

VCFed about 4 months ago

Howdy folks! I have a first model Compaq Ipaq desktop that I'm working on. I recently upgraded the CPU to a PIII 1Ghz, but now I'm getting, "1801-Microcode Update Error". It's fine with a 733 Mhz, but not the 1G. I need to update the BIOS, bu …

Sometimes you never know...

VCFed about 4 months ago

I was powering up some equipment that I need for my next job. One of those systems is an "old reliable" Socket 754 board (NForce 3A). Hit the power, BIOS signon appears and then--nothing--keyboard dead, can't get into setup. Try this about 4 t …

Error When Upgrading Hard Drive

VCFed about 4 months ago

Hello Again: Sorry for all the questions, but here is another one. I recently got a Seagate ST51080A Hard drive, and I do know that I need to use a drive overlay software. I have a Packard Bell Legend 610. I have EZ Drive on a bootable floppy, and I ha …

IBM PC 5150 Monitor + BIOS ROM

VCFed about 4 months ago

@RichCini and I have collaborated on reconstructing the Monitor + BIOS ROM code that Microsoft used to transfer 86-DOS binaries to prototype IBM PCs in the early days of PC-compatible DOS. According to the notes written by Bob O'Rear (one of the core devs …

Chaintech ES-675M bios update, what revision is correct?

VCFed about 4 months ago

I have Chaintech ES-675M motherboard with Celeron 2.2GHz which the board apparently cannot recognize properly since it claims that it is Pentium 4 and has no cache at all. I found some bios downloads but couple different "revisions" are mentione …

Enabling UDMA on system that supports it but no option in BIOS

VCFed about 4 months ago

The southbridge in this machine is a VT8231. According to the datasheet there are registers there that can be flipped on to enable UDMA. My storage solution supports UDMA. I have verified this using another machine. Thanks to some VERY nice Discord users …

Commodore PC40-III strange RAM fault

VCFed about 4 months ago

Greetings, first time posting, hopefully some gurus of board level repairs can help with this issue that's driving me mad. I have spent the past 6 or so months repairing a badly battery damaged PC40-III and have finally got it mostly working and usable, ba …
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Unidentified Dell 486

VCFed about 4 months ago

First post here, Found the Forums when trying to find more info on a unidentified Dell 486 mainboard i picked up last week, mostly going to cross post from Vogons to try and get more exposure on some lingering issues, i've been able to disable Parit …