3COM 3C509B 3c5x9cfg.exe command to reset ROM enable/address?

[DeanoC]

I stupidly set the BOOT rom address of a ISA 3COM 3C509B to D0000h which conflicts with my VGA card (I was having a bad day?!). With both in BIOS correctly beeps about no video, but I think continues if I ignore it but no display.

I do have a MDA card and monitor but they are in the To Be Tested pile, particularly the monitor.

I can blind type from dos and the 3c5x9cfg.exe has a command line interface but the manual doesn't actually give you the commands...

Anyone know how to disable or move the BOOT address from CLI?

 

[jafir]

I’m pretty sure you can just remove the EPROM and then change the address.

I had an issue changing the address because I had it loading a BIOS extension that was in use, so the config program would crash when trying to set a different address. I just pulled the chip out, set another range, and then put it back in. (With power off, I didn’t do these things hot)

 

[Svenska]

Why would a boot ROM at D000h conflict with a VGA card? My system has its EMS page frame there, and VGA just works.
Can you try using a different video card instead?

You can type blindly "CTTY COM1" to switch DOS to use COM1 instead - if you have a null-modem cable, this may work for you. Only handles TTY-style output, no graphical / pseudographical applications.