TOPS-10 Monitor Calls Manual Volume 2 AA-K039D ... - Trailing-Edge

OUTBUF [OPCODE 065J
22.114 OUTBUF [OPCODE 065]
FUNCTION
Sets up an output buffer ring with the specified number of buffers for
the specified initialized channel. Use FILOP. to perform an OUTBUF
for an extended I/O channel.
NOTE
The monitor allocates buffers in the user's address
space starting at the location pointed to by the
contents of .JBFF. This has no meaning in a non-zero
section, unless that section is mapped to section O.
Use the FILOP. monitor call to specify buffer
starting addresses in a non-zero section.
CALLING SEQUENCE
OUTBUF channo,bufcnt
return
In the calling sequence, the program supplies the following variables:
o
channo is the number of an initialized channel.
o bufcnt is the number of buffers to set up in the ring. If
you give buffers as 0, the monitor uses its default number of
buffers for the ring. This default varies according to the
device. For disks, the number of buffers is a MONGEN
parameter that can also be set with the SET DEFAULT BUFFERS
monitor command.
RETURN
The buffer ring is set up.
RELATED CALLS
o
o
FILOP.
INBUF
COMMON PROGRAMMING ERRORS
See the INBUF call for some common errors and their explanations.
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