i have an A500 rev 5 with a baseboard 4mb fully populated in the trapdoor and 512k onboard.
back in the day i had to fit a 8372A to get 1mb chip and i remember having to bend one pin up on that. i also had to run the wire from the Gary adaptor to the middle pad 2 of JP2 and cut the trace between 2-3.
now reading the manual again after 30 years it seems i should have linked pad 1-2 as well?
is this why when i run avail, after running cram, i see 1mb chip and 3mb fast? i would have thought it should read 1mb chip and 3.5mb fast?
its as if its not seeing the 512k chip onboard or maybe the 512k chip on the card?