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I.4. Interface to FDASC$
Extended Mode Interface to SYSLIB
The FDASC$ routine is called with the EM$FDASC PROC. The packet for the FDASC$
routine is generated with the EM$FDASCPKT PROC.
The EM$FDASC PROC calls the FDASC$ routine in the SYSLIB common bank.
Calling Sequence:
EM$FDASC pkt,b-reg [func]
where:
pkt
b-reg
func
The label (18-bit offset from zero) of the packet gnerated by the EM$FDASCPKT
PROC.
The b-register of the bank containing the packet generated by the EM$FDASCPKT
PROC.
The code for which FDASC$ function to perform:
1 Convert a Fieldata image to ASCII
2 Convert an ASCII image to FIeldata
The func parameter is optional. If it is omitted, EM$FDASC uses the value contained in
register A1.
EM$FDASC performs character set translation on Fieldata and ASCII images. The caller
must place the image to be transferred in the input buffer, and EM$FDASC returns the
translated image in the output buffer. The input and output buffers must be specified in
the packet generated by the EM$FDASCPKT PROC.
EM$FDASC returns the status of the call to FDASC$ 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 FDASC$
1 Illegal value given for the FDASC$ function code
If the normal return is taken, EM$FDASC returns the word length of the converted
image in H2 of word 3 of the packet (packet address + 2).
7833 1733–004 I–9