Leland C. Sheppard wrote:
The CSW status (0E00) is showing a unit check. Does the unit check
cause a CMD reject or does the CMD reject cause the unit check bit to be
set?
q&d conversion of gcard ios3270 to html
http://www.garlic.com/~lynn/gcard.html
greencard showed channel status word
http://www.garlic.com/~lynn/gcard.html#6
and unit check was an indication that a sense i/o operation was required
to obtain more detailed error information ... in fact, when there was
a unit check ... control units would go into "contingent connection"
and reflect SM+BUSY (control unit busy) to SIO for all operations to
any other (control unit) device ... it then would present CUE
(control unit end) interrupt ... with the interrupt giving the
address for the device with pending sense information.
green card didn't have sense information ... the 360/67 "blue" card did have
sense information for some number of devices. i updated some of the device
information (long ago and far away) and contributed it to gcard ios3270
sense bytes for a few devices
http://www.garlic.com/~lynn/gcard.html#17
one of the "features" that I had to handle when rewrote the i/o supervisor for
the disk engineering and product test labs (bldg. 14 & 15) was "contingent
connection" scenario when the unit check interrupt hadn't been presented in
the correct order (i.e. control unit in contingent connection, appeared to
be solid SM+BUSY because the system hadn't seen the unit check interrupt
hadn't come in) ... misc. past posts mentioning work for bldgs. 14&15:
http://www.garlic.com/~lynn/subtopic.html#disk
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO
Search the archives at http://bama.ua.edu/archives/ibm-main.html
