
Multiprocessor Support
4-21
4
Network I/O Error Codes
167Bug returns an error code if an attempted network operation is
unsuccessful.
Multiprocessor Support
The MVME167 dual-port RAM feature makes the shared RAM
available to remote processors as well as to the local processor. This
can be done by either of the following two methods:
❏
The Multiprocessor Control Register (MPCR) Method
❏
The Global Control and Status Register (GCSR) Method
Either method can be enabled/disabled by the
ENV
command as
its Remote Start Switch Method (refer to Appendix A).
Multiprocessor Control Register (MPCR) Method
A remote processor can initiate program execution in the local
MVME167 dual-port RAM by issuing a remote
GO
command
using the Multiprocessor Control Register (MPCR).
The MPCR, located at shared RAM location of $800 offset from the
base address the debugger loads it at, contains one of two
longwords used to control communication between processors.
The MPCR contents are organized as follows:
Base A $800
*
N/A N/A N/A (MPCR)
Summary of Contents for MVME167 Series
Page 1: ...MVME167 Single Board Computer Installation Guide MVME167IG D4 ...
Page 6: ......
Page 106: ...4 28 Debugger General Information 4 ...
Page 132: ...5 26 Using the 167Bug Debugger 5 ...
Page 146: ...A 14 Configure and Environment Commands A ...
Page 152: ...B 6 Disk Tape Controller Data B ...
Page 160: ...D 6 Troubleshooting the MVME167 Solving Startup Problems D ...
Page 168: ...E 8 EIA 232 D Interconnections E ...