Z-80 Plus is a 4 MHz Z-80 microprocessor for running 1.6 to 4.0 CP/M software. AE released their own version of the operating system called CP/AM. Executes the full Z-80, 8080 and 8085 instruction set, and supports Z-80 interrupts. Can access up to 1088K of memory (most programs only need 48K). Compatible with II+ and IIe.