Macintosh SE - Logic Board with Jumper; 1 MB to 2.5 MB; 1 MB to 4 MB

Upgrades Memory Upgrade - 6
Logic Board with
Jumper
1 MB to 2.5 MB
Remove the two 256K
SIMMs from slots 3 and 4.
Install two 1 MB SIMMs in
slots 3 and 4. Remove the
jumper permanently.
1 MB to 4 MB
Remove all four 256K
SIMMs. Install four 1 MB
SIMMs. Remove the jumper
permanently.
Jumper
Slot 1
Slot 4
Slot 3
Slot 2