Motorola MVME162LX ユーザーズマニュアル
Preserving the Debugger Operating Environment
4-13
4
Hardware Functions
The only hardware resources used by the debugger are the EIA-
232-D ports, which are initialized to interface to the debug terminal
and a host. If these ports are reprogrammed, the terminal
characteristics must be modified to suit, or the ports should be
restored to the debugger-set characteristics prior to reinvoking the
debugger.
232-D ports, which are initialized to interface to the debug terminal
and a host. If these ports are reprogrammed, the terminal
characteristics must be modified to suit, or the ports should be
restored to the debugger-set characteristics prior to reinvoking the
debugger.
Exception Vectors Used by 162Bug
The exception vectors used by the debugger are listed below. These
vectors must reside at the specified offsets in the target program's
vector table for the associated debugger facilities (breakpoints,
trace mode, etc.) to operate.
vectors must reside at the specified offsets in the target program's
vector table for the associated debugger facilities (breakpoints,
trace mode, etc.) to operate.
, the target stack pointer is left pointing past the bottom of the
exception stack frame created; that is, it reflects the system stack
Table 4-2. Exception Vectors Used by 162Bug
Vector
Offset
Offset
Exception
162Bug Facility
$10
Illegal instruction
Breakpoints (used by GO, GN, GT)
$24
Trace
Trace operations (such as T, TC, TT)
$80-$B8
TRAP #0 - #14
Used internally
$BC
TRAP #15
System calls
$ Note 1
Level 7 interrupt
ABORT pushbutton
$ Note 2
Level 7 interrupt
AC Fail
$DC
FP Unimplemented Data Type
Software emulation and data type
conversion of ßoating point data.
conversion of ßoating point data.
Notes
1.
1.
This depends on what the Vector Base Register (VBR) is set to in the MC2chip.
2.
This depends on what the Vector Base Register (VBR) is set to in the VMEchip2.