user manual

Debugger General Information

B-34

177Bug>OF R0

R0 =00000000 00000000? 1327C. <CR>

177Bug>

MD 0+R0;DI <CR>

00000+R0 48E78080 MOVEM.L D0/A0,—(A7)

00004+R0 4280 CLR.L D0

00006+R0 1018 MOVE.B (A0)+,D0

00008+R0 5340 SUBQ.W #1,D0

0000A+R0 12D8 MOVE.B (A0)+,(A1)+

0000C+R0 51C8FFFC DBF D0,$A+R0

00010+R0 4CDF0101 MOVEM.L (A7)+,D0/A0

00014+R0 4E75 RTS

177Bug>

For additional information about the offset registers, refer to the

Debugging Package for Motorola 68K CISC CPUs User's Manual.

Port Numbers

Some 177Bug commands allow you the option of choosing the port

to be used to input or output. Valid port numbers which may be

used for these commands are as follows:

1. MVME177 EIA-232-D Debug (Terminal Port 0 or 00) (PORT 1

on the MVME177 P2 connector). Sometimes known as the

Òconsole portÓ, it is used for interactive user input/output by

default.

2. MVME177 EIA-232-D (Terminal Port 1 or 01) (PORT 2 on the

MVME177 P2 connector). Sometimes known as the Òhost

portÓ, this is the default for:

Ð Downloading

Ð Uploading

Ð Concurrent mode

Ð Transparent modes.

Note These logical port numbers (0 and 1) are shown in the

pinouts of the MVME177 module as ÒSERIAL PORT 1"

and ÒSERIAL PORT 2", respectively. Physically, they

are all part of connector P2.