Motorola MVME187 User Manual

4-16

Debugger General Information

 reads an operating system or control program from a specified 

device into memory, and then returns control to 187Bug. It is used 
as a debugging tool. 

All operations that actually access the disk are done directly or 
indirectly by 187Bug TRAP #496 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 88K RISC CPUs User's 
Manual for information on using these and other system calls. 

To perform a disk operation, 187Bug 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.