That rendered the use of a dedicated develpment system
with in-circuit
emulator
unnecessary, though not totally without potential merit.
I bought something called a Romulator (something like that,
http://www.romrocket.com/) that I could dump a file to over a serial link,
and then it behaved in circuit exactly like an eprom. That with little bits
of test software did just about everything I needed, along with a 4 trace
scope to look at timing etc.
What exactly is it that a microprocessor "system" like the Apple II or
Aim65 can't do? (a paragraph not a page please)