If 72pin simms have 144 physical connections, what are the ones on the back for?
Ditto on 30pin?
I have found the respective pinouts for both 30pin simms, 72pin simms and the DIPs I have.
Anyway I was thinking of taking an 8mb 72pin simm and wiring it into the respective pins in my sockets based on
http://www.repairfaq.org/REPAIR/F_Pinou ... INOUTS_034
Can I ignore the back side and just wire to the front? Or are 8mb simms treated like 2 banks of 4mb with a 4mb simm on the front and one on the back requiring me to hook up the identical pins together?
Mr Wood one of my teachers thinks that I can simply take a23 and attach it to a10 on the simm for the missing address line. Is this assumption acceptable? (this leads to my next question)
I also noticed that a motorola 68010 should really only be able to address 8mb.
http://www.xs4all.nl/~ganswijk/chipdir/giicm/68010.txt
(notice a1-a23 which is not 24bits)
But I believe that it does something screwy with the a23 address pin allowing it to multiplex for a virtual 24bit address, does this eliminate my ability to just hook it up to the missing address line?
Thanx for the previous links

Ryan
(sorry if this seems duplicate, I don't really know what to put this under)