VIM Q again
Cameron Simpson
cs at zip.com.au
Tue Jun 3 00:17:06 UTC 2008
On 02Jun2008 10:44, Rick Stevens <ricks at nerd.com> 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 at zip.com.au> 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
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