How to: upgrade a 520/540 to a 550c ROM

[frontein1]

You beat me to it I was just typing this. I bet the driver number for the ROMDISK is likely causing this. The number I chose is right in the middle of a bunch of other resident drivers. So next patch we will want to find a better driver number.

As for the ROMDISK itself, looks like it is there just not opened. Give this a try. When the console comes up, type in ROMDISK. Then check Tattletech again to see the status. Hopefully this mounts the ROM disk in the Finder. If not try Rob Brown's dumpdrives. You can enter the drive number in there and post a disk event as well.

 

[croissantking]

After typing ROMDISK and pressing enter, I see the following flash up for a split second, then I crash with an illegal instruction.

 

[frontein1]

OK, I must have something terribly wrong in that driver. I'll port this over to like a Quadra so I can do some on the fly troubleshooting. More to come!

 

[croissantking]

I wonder what desktop ROM the 500 series is most closely related to. It’s 2MB, so would that be the AV Quadras?

 

[frontein1]

I wonder what desktop ROM the 500 series is most closely related to. It’s 2MB, so would that be the AV Quadras?

Yes I was wondering this too. Can we boot a Quadra with the 550c ROM, essentially how 'universal' is that ROM? Q605 or Q840av might be good candidates to try. I'll give this a whirl.