Sorry for the repeat. Apparaently I clicked repy instead of edit New material a couple of paragraphs down.
There were a few variations on the ROM versions for that family of machines, but putting in the wrong ROM won't cause a failure to boot. At most, you might get an unstable machine. The revisions were pretty tiny and I don't think the 6100 ever got a revision.
It was the 8100 and 9150 that had slightly different ROMs supporting the variations in NuBus controllers and such.
Is it possible you're moving the cache between machines, instead of the ROM? Try booting the AV while you have the "ROM" out of it.
You can't rely on the slot labels. The ROM and the cache DIMMs can go in either slot. So you could have the ROM in the cache slot and vice versa.
There were a few variations on the ROM versions for that family of machines, but putting in the wrong ROM won't cause a failure to boot. At most, you might get an unstable machine. The revisions were pretty tiny and I don't think the 6100 ever got a revision.
It was the 8100 and 9150 that had slightly different ROMs supporting the variations in NuBus controllers and such.
Is it possible you're moving the cache between machines, instead of the ROM? Try booting the AV while you have the "ROM" out of it.
You can't rely on the slot labels. The ROM and the cache DIMMs can go in either slot. So you could have the ROM in the cache slot and vice versa.