Iot (I/O Teach; Ioc (I/O Control; Bo (Bootstrap Operating System; Bh (Bootstrap And Halt - Motorola MVME177 Installation And Use Manual

IOT (I/O Teach)

IOT allows you to change any configurable parameters and
attributes of the device. In addition, it allows you to view the
controllers available in the system.

IOC (I/O Control)

IOC allows you to send command packets as defined by the
particular controller directly. IOC can also be used to examine the
resultant device packet after using the IOP command.

BO (Bootstrap Operating System)

BO reads an operating system or control program from the
specified device into memory, then transfers control to it.

BH (Bootstrap and Halt)

BH reads an operating system or control program from a specified
device into memory, then returns control to 177Bug. It is used as a
debugging tool.

Disk I/O via 177Bug System Calls

All operations that actually access the disk are done directly or
indirectly by 177Bug 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 allow user programs to perform disk
I/O:
.DSKRD Disk read. Use this system call to read blocks from a disk into memory.
.DSKWR Disk write. Use this system call to write blocks from memory onto a
disk.
Disk I/O Support
B-17
B