Yep. I was going to ask that as a Friday riddle: "what was special about channel 12?" Yes, a program could check it so that it knew when to quit printing detail lines, print subtotals, and eject to a new page. Holy cow! Can you imagine a program running directly connected to a printer, not spooled?
Generated a Data Check (?) on the channel, which showed up in the I/O completion status somewhere. I just looked -- still sort of supported in COBOL 4.2 anyway: "AT END-OF-PAGE" -- but now relies on a programmatic counter. Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Dana Mitchell Sent: Tuesday, January 17, 2017 11:57 AM To: [email protected] Subject: Re: Paper tape (was Re: Hidden Figures) And also wasn't a channel 12 punch used as end of form indicator that could be checked programatically, so the program could skip to channel 1 when needed? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
