Address mirroring on 128K/512K/Plus — #4

Post #4 by bigmessowires

Source Forum	68kMLA
Category	68k
Post Date	Fri, 9 Sep 2011 - 01:06
Original URL	https://68kmla.org/bb/threads/address-mirroring-on-128k-512k-plus.23825/

Post

OK, I finally found the reference I was thinking of. It's in the MESS source code: http://git.redump.net/cgit.cgi/mess/plain/src/mess/machine/mac.c

The Mac Plus boot code seems to check to see the extent of ROM mirroring to determine if SCSI is available. If the ROM is mirrored, then SCSI is not available. Thanks to R. Belmont for making this discovery.