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

ERLST. [CALLI 132]
22.44 ERLST. [CALLI 132]
FUNCTION
Returns data giving the status of aach device on an MPX channel that
has errors.
CALLING SEQUENCE
MOVE I ac,addr
ERLST. ac,
error return
skip return
addr:
XWD
BLOCK
length,channo
length-1
In the calling sequence, the program supplies the following variables:
o
o
o
addr is the address of the argument block.
length is the length of the argument block; the length should
be the number of devices connected to the channel plus two.
channo is the number of an initialized channel.
SKIP RETURN
The monitor returns data at addr+1 for devices on the channel that
have errors. The data at addr is in the format:
addr:
XWD
EXP
XWD
XWD
length,channo
number of devices
udx,status
udx, status
In the argument list, the program supplies the following variables:
o
length and channo were given in the call.
o number of devices is the number of devices on the channel
that have encountered errors.
o
udx is the Universal Device Index of a device having errors.
o
status is a halfword
device. These bits
GETSTS monitor call.
containing I/O status bits for the
are identical to those returned for a
The monitor continues to return device error information in the
argument block until all space allocated by your program has been
filled. Your program should check the value of addr+1. If addr+1 is
greater than the length of the argument block minus two, the device
error list is incomplete because of lack of space.
For a list of I/O status bits, see the appropriate device in Volume 1.
22-125