NAME
   Z80 - Invoke Z80 processor or emulator

SYNOPSIS
   *Z80 [-mos mosfile] 

DESCRIPTION
On the Arc:

Claims 64k of RMA. Loads any relavant files. Executes them. On OS_QUIT,
releases RMA.

Within claimed program, can do *Z80 which claims another 64k... etc...

Within claimed program, can do Wimp_Poll, which can then return into the
z80 code, until OS_QUIT releases them RMA.