DRL.CF - read or write the TSS core file.

Usage:

B:
   drl.cf( vec, count, index, readflag );
 
C:
#equate B_drl_cf drl.cf
void B_drl_cf(void *vec, int count, int index,
              int readflag);

Where:

vec: is the address of the first word in the user program that is to be transferred to or from.
count: is the number of words to transfer. It should be in the range 1 to 10.
index: is the index of the word in the core file to be transferred. It too should be in the range 1 to 10.
readflag: should be 1 if the core file is being read, and 0 if it is being written.

Description:

TSS allocates 10 words in the UST for communication between subsystems. This space is called the "core file". DRL.CF provides a convenient way to read/write data from/to this space.

Notes:

The words are numbered from one to ten, NOT zero to nine.