Interesting question:
IF . . . the IIfx requires SIMMs of 1MB minimum capacity . . .
IF . . . the IIfx RAM banks need to be of equal size . . .
Then . a IIfx needs a minimum of four 1MB Simms installed in both banks to boot . . .
Might a IIsi with 1MB soldered into Bank A, actually boot with 4 256Kb "Keychain" SIMMS in Bank B with a IIfx SIMM installed? :?:
Maybe it's time to rummage around for some Keychain fobs! :
IF . . . the IIfx requires SIMMs of 1MB minimum capacity . . .
IF . . . the IIfx RAM banks need to be of equal size . . .
Then . a IIfx needs a minimum of four 1MB Simms installed in both banks to boot . . .
Might a IIsi with 1MB soldered into Bank A, actually boot with 4 256Kb "Keychain" SIMMS in Bank B with a IIfx SIMM installed? :?:
Maybe it's time to rummage around for some Keychain fobs! :