v1.3

Emulation of the z80pack Intel 8080 core on Arduino Nano.

In this version the CPU implementation is replaced by a code size optimized one from Thomas Eberhardt.

Machine still contains the following components:

8080 CPU running with 0.04 MHz
MITS Altair 88-SIO Rev. 1 for serial communication
RAM @ 0000H - FEFFH
ROM @ FF00H - FFFFH