Abort Switch (S1); Reset Switch (S2); Figure 2-1. Ppcbug Firmware System Startup - Motorola MVME2700 Series Installation And Use Manual

Operating Instructions
2

ABORT Switch (S1)

RESET Switch (S2)

2-2

Figure 2-1. PPCBug Firmware System Startup

The switch sends an interrupt signal to the processor. The interrupt
ABORT
is normally used to abort program execution and return control to the
debugger firmware located in the MVME2700 EPROM and Flash
memory.
The interrupter connected to the
filtered to remove switch bounce.
The switch resets all onboard devices; it also drives a
RESET
signal if the MVME2700 is the system controller.
be generated by the
RESET
or by a control bit in the Miscellaneous Control Register (MISC_CTL) in
the Universe II ASIC. For further details, refer to
page 3-19.
STARTUP
SYSTEM
INITIALIZATION
CONSOLE
DETECTION
STARTUP SCRIPT
EXECUTION
(IF ENABLED)
OPERATING
SYSTEM
switch is an edge-sensitive circuit,
ABORT
switch, a power-up reset, a watchdog timeout,
Computer Group Literature Center Web Site
11734.00 9702
∗
SYSRESET
∗
signals may
SYSRESET
RESET Switch (S2) on