Allen-Bradley 1770-M10 Assembly And Installation Manual page 52

Appendix B
1770-M11 Mass Storage System
B 4
GA Basic file storage and retrieval command
Copy
Record oriented file management commands and functions
Assign
Deassign
Allocate
Open
Deallocate
Close
Read
Write
Setrecord
Getchar
Outchar
Testchar
Testline
Waitchar
EOF (end of file)
File protection commands
Show/User
Identify
Changepass
Setprot
Adduser
Addsystem