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Debugger General Information
4
BH (Bootstrap and Halt)
BH
reads an operating system or control program from a specified
device into memory, and then returns control to 167Bug. It is used
as a debugging tool.
Disk I/O via 167Bug System Calls
All operations that actually access the disk are done directly or
indirectly by 167Bug TRAP #15 system calls. (The command-level
disk operations provide a convenient way of using these system
calls without writing and executing a program.)
The following system calls are provided to allow user programs to
do disk I/O:
Refer to the
Debugging Package for Motorola 68K CISC CPUs User's
Manual
for information on using these and other system calls.
Controller Command Packets
To perform a disk operation, 167Bug must eventually present a
particular disk controller module with a controller command
packet which has been especially prepared for that type of
controller module. (This is accomplished in the respective
controller driver module.)
.DSKRD
Disk read. System call to read blocks from a disk into
memory.
.DSKWR
Disk write. System call to write blocks from memory onto
a disk.
.DSKCFIG
Disk conÞgure. This function allows you to change the
conÞguration of the speciÞed device.
.DSKFMT
Disk format. This function allows you to send a format
command to the speciÞed device.
.DSKCTRL Disk control. This function is used to implement any
special device control functions that cannot be
accommodated easily with any of the other disk functions.
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 ...