This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
An error in the Sirius manual (a 1 page paper) recommends that ROM 3 users remove one of the SIMM modules since the ROM 3 has 1MB and 8MB is max. When I did this, the GS reported 8MB, but copying large groups of files or large files (>800k) failed. When I put the missing SIMM back, the GS still reported 8MB, but the file copy problems vanished. It appears that the Sirius needs eight 1MB SIMM modules for 8MB even on a ROM 3. By: Scott G ---------------------------- By: Rodney Hester Turns out I had the opposite experience. In my system (ROM 3 with 8MB Sirius v2.0 and Focus drive) the large file corruption problems, "ghosties" (weird video artifacts), random system crashes (especially when Balloon 2.0 was active), etc. all went away when I removed "SIMM 8". (There is some numbering on the back of the Sirius.)