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Interface to Selected Extended Mode Executive Requests
The buffer must be either in the same bank that contains the packet or in a bank that is
based on B15 when EM$READ or EM$AREAD is called.
The status word from the ER READ$/AREAD$ is returned in word 3 of the packet
(packet address + 2). S2 of word 3 contains an EOF flag; a nonzero value indicates an
end-of-file condition. S1 of word 3 contains the bit settings returned from the ER
READ$/AREAD$ request (bits 35 to 30). H2 of word 3 contains the number of words
read by EM$READ/EM$AREAD into the buffer. The buffer is not space filled if the
length of the image read is shorter than the length of the buffer.
F.2.2. EM$PRINTPKT
The EM$PRINTPKT PROC generates the packet for the EM$PRINT and EM$APRINT
PROCs.
Calling Sequence
label EM$PRINTPKT buf,len[,linespa]
or
label EM$APRINTPKT buf,len[,linespa]
Parameters
buf
len
linespa
The address (18-bit offset from zero) of the buffer containing the image to be
printed.
The word length of the image to be printed.
The line spacing for the image to be printed (if omitted, the default is one).
The buf, len, and linespa parameters may also be set at execution time. The buf
parameter is located at word 3 of the packet (packet address + 2). The len parameter is
located at S3 of word 2 of the packet, and the linespa parameter is located at T1 of word
2.
The buffer must be in either the same bank that contains the packet or in a bank that is
based on B15 when EM$PRINT or EM$APRINT is called.
7833 1733–004 F–3