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Debugger General Information
B
Vector
Offset
$10
$24
$80-$B8
$BC
$Note
$Note
$DC
Note: Offsets marked ÒNoteÓ depend on what the Vector Base Register (VBR)
is set to in the VMEchip2.
177Bug>
PC
SSP* =00010000 USP
CACR =00000000=D:....._B:..._I:...
D0
D4
A0
A4
000
PC
USP
DFC
D0
D4
A0
A4
00010006 D280
177Bug>
B-38
Table B-3. Exception Vectors Used by 177Bug
Exception
Illegal instruction
Trace
TRAP #0 - #14
TRAP #15
Level 7 interrupt
Level 7 interrupt
FP Unimplemented Data
Type
Example: Trace one instruction using debugger.
RD
=000E0000 SR
=2700=TR:OFF_S._7_.....
=00010000 SFC
=00000000 D1
=00000000 D2
=00000000 D5
=00000000 D6
=00000000 A1
=00000000 A2
=00000000 A5
=000C0000 A6
4E71
NOP
=00010006 SR
=2700=TR:OFF_S._7_.....
=0000DFFC MSP
=0000EFFC ISP* =0000FFFC SFC
=0=F0
CACR =0=........
=00000001 D1
=00000000 D2
=00000000 D5
=00000000 D6
=00000000 A1
=00000000 A2
=00000000 A5
=00000000 A6
177Bug Facility
Breakpoints (used by GO, GN, GT)
Trace operations (such as T, TC, TT)
Used internally
System calls
ABORT push-button
AC Fail
Software emulation and data type
conversion of ßoating point data.
VBR
=1=UD
DFC
PCR
=00000000 D3
=00000000 D7
=00000000 A3
=00000000 A7
VBR
=00000000 D3
=00000000 D7
=00000000 A3
=00000000 A7
ADD.L
D0,D1
=00000000
=1=UD
=04300000
=00000000
=00000000
=00000000
=00010000
0000E
T
177Bug>
=00000000
=0=F0
=00000000
=00000000
=00000000
=0000FFFC
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