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Using the 166Bug Debugger
By using one of the offset registers, the disassembled code addresses can be
made to match the listing file addresses as follows:
166Bug>
R0 =00000000 00000000?
166Bug>
00000+R0 48E78080
4
00004+R0 4280
00006+R0 1018
00008+R0 5340
0000A+R0 12D8
0000C+R0 51C8FFFC
00010+R0 4CDF0101
00014+R0 4E75
166Bug>
For additional information about the offset registers, refer to the Debugging
Package for Motorola 68K CISC CPUs User's Manual.
Port Numbers
Some 166Bug commands give you the option to choose the port to be used to
input or output. Valid port numbers which may be used for these commands
are as follows:
1.
MVME166 EIA-232-D Debug (Terminal Port 0 or 00) (PORT 1 on the
MVME166 J9 connector). Sometimes known as the "console port", it is
used for interactive user input/output by default.
2.
MVME166 EIA-232-D (Terminal Port 1 or 01) (PORT 2 on the MVME166 J9
connector). Sometimes known as the "host port", this is the default for
downloading, uploading, concurrent mode, and transparent modes.
N
ote
4-8
OF R0
MD 0+R0;DI
CR
<
These logical port numbers (0 and 1) are shown in the
pinouts of the MVME166 module as "SERIAL PORT 1" and
"SERIAL PORT 2", respectively. Physically, they are all part
of connector J9.
1327C.
CR
<
>
>
MOVEM.L
CLR.L
MOVE.B
SUBQ.W
MOVE.B
DBF
MOVEM.L
RTS
MVME166 Single Board Computer Installation Guide
D0/A0,—(A7)
D0
(A0)+,D0
#1,D0
(A0)+,(A1)+
D0,$A+R0
(A7)+,D0/A0
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