First post, by Predator99
while further troubleshooting my IBM 5150 board...
Re: IBM 5150 Mainboard repair
...I had an idea which could simplify the usage of the Supersoft-ROM - especially in the 5150 as it uses a non-standard ROM and you have to build an adapter...
I think it should be possible to remove the BIOS on the Mainboard and put the Supersoft-ROM on a ISA-card (i.e. Network or SCSI). Only problem: The ISA ROM needs to mapped at F000:0 or above to be executed at Power-on. But I didnt find any standard card that is able to do that...which makes sense as this area is normally occupied by the system BIOS.
Anybody has an idea how to realize this? Maybe modify adress lines on a network card?