Control file items

R[n]:e[.f][/b]

n represents the file number and is optional. If not specified, it is assumed to be 6. If specified, the file number must be 6 or 9 - 255 decimal.

e specifies the element number (three words per element) within the Control file. It must be 0 - 255 decimal.

f identifies one of the valid Control fields. The valid fields for the Control files are listed in the table. If .f is omitted, it is assumed to be the word containing the status bits.

b is optional and is normally not used. All of the fields of a Control file can be accessed by specifying the .f fields. However, it is possible to use /b to single out a bit in the .LEN or .POS fields (which are words). The bit number must be 0 - 15 decimal.