CMS Preferred Interface I/O Support
If you run your program in an XC or XA virtual machine, you need to issue channel subsystem I/O instructions.
The best way to handle I/O to and from devices is to use the I/O macros in the CMS preferred interface.
The following table summarizes the macros CMS provides to help you write I/O code that works in an ESA XC or XA virtual machine:
Function | Macros | Reference |
---|---|---|
File management |
|
CMS File System |
Console I/O |
|
Console and Terminal I/O |
Unit Record I/O |
|
Unit Record Devices and Tapes |
Tape I/O |
|
Tape Handling Macros |
I/O Interrupt Handling |
|
Interrupt Handling |