We all know that the Mac Plus will boot with 512K, 1 meg, 2.5 meg, or 4 megs of RAM. How about 256K or 128K?

If I took a couple of 256 K 30 pin sims and cut the high address line, will it cut the memory seen in half? In otherwords, can I mod a 256K SIM to get 128K or 64K of RAM?

If so, then by placing two modded SIMS we could get a 256K or 128K Mac Plus.

Why? Just for fun or to test software in a 128K environment using a Plus.

I wonder what the Plus ROM would do on startup if it found 128K or 256K of RAM? Would it error out or continue to boot?

If you can use a 64K or 128K SIMM, the different memory capacities of a Mac Plus would be:

128

256

382

512

640

768

1024

2048

2176

2304

2560

4096

I bet that will confuse some older software 8-o