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func
param
The code for which GETPSF$ function to perform:
1 Assign n program scratch files
2 Assign a specific program scratch file
An additional parameter for the following function codes:
1 The number of files requested (from 1 to 10)
2 The number of the specific file requested
Extended Mode Interface to SYSLIB
The func and param parameters are optional. If they are omitted, EM$GETPSF uses the
values contained in registers A1 and A2, respectively.
EM$GETPSF returns the status of the call to GETPSF$ in the packet field CALLSTAT.
The CALLSTAT field is S3 of word 2 of the packet (packet address + 1). The possible
status is
0 Normal return from GETPSF$
1 Error return from GETPSF$, error code in field A0SAVE
2 Illegal value given for the GETPSF$ function code
For CALLSTAT codes 0 and 1, the contents of registers A0, A1, and A2 from GETPSF$
are returned in packet fields A0SAVE, A1SAVE, and A2SAVE, respectively. These fields
are at words 3, 4, and 5 of the packet.
Packet Generation
EM$GETPSFPKT generates the 18-word packet for the Extended Mode interface to
GETPSF$. This packet is required for the EM$GETPSF PROC.
Calling Sequence
label EM$GETPSFPKT
There are no parameters for the EM$GETPSFPKT PROC.
7833 1733–004 I–11