Motorola MVME177, Installation And Use Manual, Page: 98 / 171

Debugger General Information
B-18
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Refer to the Debugging Package for Motorola 68K CISC CPUs User's
Manual for information on using these and other system calls.
To perform a disk operation, 177Bug 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.) A command packet for one type of
controller module usually does not have the same format as a
command packet for a different type of module. The system call
facilities which perform disk I/O:
❏
Accept a generalized (controller-independent) packet format
as an argument
❏
Translate it into a controller-specific packet
❏
Send it to the specified device
Refer to the system call descriptions in the Debugging Package for
Motorola 68K CISC CPUs User's Manual for details on the format and
construction of these standardized ÒuserÓ packets.
The packets which a controller module expects to receive vary from
controller to controller. The disk driver module for the particular
hardware module (board) must take the standardized packet given
to a trap function and create a new packet which is specifically
tailored for the disk drive controller receiving it. Refer to
documentation on the particular controller module for the format
of its packets, and for using the
IOC command.
.DSKCFIG Disk conÞgure. Use this system call to change the conÞguration of the
speciÞed device.
.DSKFMT Disk format. Use this system call to send a format command to the
speciÞed device.
.DSKCTRL Disk control. Use this system call to implement any special device
control functions that cannot be accommodated easily with any of the
other disk functions.