On Mon, 6 Dec 2021 13:34:05 -0700, Sri h Kolusu wrote: >> X'03' is "No operation" i.e. "don't print". C'+' is "Print >withoutspacing." > >X'03' is "No operation" for "Machine withOUT data" > I believe even a no-op CCW (used to?) need a nonzero count, else the channel threw an error. Perhaps the channel didn't know what the command meant to the device.
I believe the data were transferred but the printer didn't print them. I don't know whether an invalid character in a no-op caused a data error. It's all probably model-dependent. -- gil\ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
