ICS TRIPLEX T8201 Communication module

These following 16XBug commands are provided for disk I/O. Detailed instructions for their use are found in Chapter 3. When a command is issued to a particular Controller Logical Unit Number (CLUN) and Device Logical Unit Number (DLUN), these LUNs are remembered by 16XBug so that the next disk command defaults to use the same controller and device.This command is used to probe the system for all possible CLUN/DLUN combinations and display inquiry data for devices which support it. The device descriptor table only has space for 16 device descriptors; with the IOI command, you can view the table and clear it if necessary

IOP (Physical I/O to Disk)

 IOP allows you to read or write blocks of data, or to format the specified device in a certain way. IOP creates a command packet from the arguments you have specified, and then invokes the proper system call function to carry out the operation. IOT (I/O Teach) IOT allows you to change any configurable parameters and attributes of the device. In addition, it allows you to see 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 look at the resultant device packet after using the IOP command.

Disk I/O via 16XBug System Calls 

All operations that actually access the disk are done directly or indirectly by 16XBug 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:Disk format. This function allows you to send a format command to the specified device.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.

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