14 Jul
2001
14 Jul
'01
5:38 a.m.
MicroBug was first introduced with the Mac Plus and has
been a standard
component in the ROM of all Mac OS computers since then. MicroBug is invoked
when the system takes a Non-Maskable Interrupt (NMI) and there is no other
debugger (e.g., MacsBug) installed.
What debugger did the 128k have in it then? It shipped with
a small switch that pressed both a recessed reset switch and a
programmers switch. The switches were accessed through the side
ventilation slots.
Jeff
--
Collector of Classic Microcomputers and Video Game Systems:
Home of the TRS-80 Model 2000 FAQ File
http://www.geocities.com/siliconvalley/lakes/6757