tgl@zog.cs.cmu.edu (Tom Lane) (08/21/89)
This is an RTFM type question, but unfortunately I don't have access to the manual. Perhaps someone who does would look it up for me? The question concerns an HP 2225A (HPIB Thinkjet) printer. Under what conditions can this printer send "SRQ" (service request)? Is SRQ response programmable, besides the SRQ configuration switch (which I assume is just an overall enable/disable)? Thanks. -- tom lane Internet: tgl@zog.cs.cmu.edu UUCP: <your favorite internet/arpanet gateway>!zog.cs.cmu.edu!tgl BITNET: tgl%zog.cs.cmu.edu@cmuccvma
onymouse@netcom.UUCP (John DeBert) (08/21/89)
in article <5916@pt.cs.cmu.edu>, tgl@zog.cs.cmu.edu (Tom Lane) says: > > This is an RTFM type question, but unfortunately I don't have access > to the manual. Perhaps someone who does would look it up for me? Of course... > > The question concerns an HP 2225A (HPIB Thinkjet) printer. > Under what conditions can this printer send "SRQ" (service request)? > Is SRQ response programmable, besides the SRQ configuration switch > (which I assume is just an overall enable/disable)? According to the manual, SRQ is not programmable. It can be set only by the SRQ enable switch on the back. JJD onymouse@netcom.UUCP
rjn@hpfcdc.HP.COM (Bob Niland) (08/22/89)
re: "The question concerns an HP 2225A (HPIB Thinkjet) printer." > Under what conditions can this printer send "SRQ" (service request)? > Is SRQ response programmable, besides the SRQ configuration switch > (which I assume is just an overall enable/disable)? Regardless of what the manual says, I have seen defect reports that indicate that the SRQ behaviour of the 2225A is not reliable. The problem seems to be unique to the 2225A. Reported defects include: - Only the first SRQ after power-up is detected. - Spurious SRQs are detected, and when SPOLL'd, the 2225A denies having any reason for the SRQ. Regards, Hewlett-Packard Bob Niland rjn%hpfcrjn@hplabs.HP.COM 3404 East Harmony Road [hplabs|hpu...!hpfcse]!rjn Ft Collins CO 80525-9599
grg@otter.hpl.hp.com (Gerd Groos) (08/22/89)
>The question concerns an HP 2225A (HPIB Thinkjet) printer. >Under what conditions can this printer send "SRQ" (service request)? >Is SRQ response programmable, besides the SRQ configuration switch >(which I assume is just an overall enable/disable)? Manual page D-4: "When the SRQ enable switch is on (set to 1) the printer will assert SRQ when [...] - Self test failed - Out of paper - Carriage Motion Disabled [...] If 'listen always' is enabled, the printer will never assert SRQ. [...] When the SRQ enable switch is off (0) the printer is prevented from requesting service." Definition of each bit in the status byte (sent by the Thinkjet on serial poll); -Bit 7 Self Test failed - 6 always 0 - 5 Out of Paper - 4 always 0 - 3 Buffer full - 2 Buffer empty - 1 always 0 - 0 Carriage Motion disabled A one in a particular bit signifies that the corresponding condition is TRUE. The DIP switch on the back of the printer is read only on power-on. Hope this helps, Gerd.