< That's an interesting question! I wonder what the difference in the <software is? I don't think I've ever heard of a CMOS AIM 65. The BASIC <comes up as ver 1.1. I didn't see a version on the assembler. The ICs <containing the assembler and BASIC don't have any special markings. They'r <PN is the same as the PN of the two standard ROMs except one digit is <different. Same here. The AIM was out of production before the CMOS process was in production as I remember... back then CMOS was stll expensive too, less incentive to use it in the AIM. Allison