To reap what I have sowed. Most programmers have confidence, which is not to be confused with arrogance, which has no place in a craft like this. This is a practiced craft, so I haven't met anybody , with the exception of the Scientist's at Palo Alto , who could call themselves above their craft (even they where a humble lot) and those guys where good.
PDP's have a bus arbitration or granting scheme, Mainframe's as far I knew didn't. They may have used other schemes, but as far as I could tell, I didn't know of any. As as I was taught , the CS used an interrupt driven scheme for device allocation. Beyond that I leave those areas for the more seasoned experts who know. CDC's or Ahmdal's, Burroughs where not my take, they could have used anything I , and would have not known any different CCW coding to which I was referring is the way you custom programmed various I/O device ( including CKD, printers or tape, or Card reader or punches, even 3770/3780['s ). Much of that coding was handled by the more experienced coders, who new something about the target devices. General assembler application programming, where I did my coding was another set of skills entirely. ---------------------------------------------------------------------- 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
