On 02Jun2008 10:44, Rick Stevens <ricks@xxxxxxxx> wrote: > So, yes, the Z80 had conditional relative jumps. It also had that nice > set of secondary registers...very handy for interrupt processing. The PDP-11s had secondary registers too. Under V7 UNIX, they weren't used for interrupts, and indeed weren't used at all by the OS software. We wrote a little program to put a small message in the alternate registers for a friend to read later:-) -- Cameron Simpson <cs@xxxxxxxxxx> DoD#743 http://www.cskk.ezoshosting.com/cs/ Music journalism: People who can't write interviewing people who can't talk for people who can't read. - Frank Zappa -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
