On Fri, Aug 30, 2002 at 05:39:13AM -0700, Sellam Ismail wrote:
On Fri, 30 Aug 2002, Derek Peschel wrote:
> On Fri, Aug 30, 2002 at 02:32:30AM -0700, Sellam Ismail wrote:
> > If I recall correctly, the seminally useless
40/80 column switch on the
Does that mean "useless from the time when it was created" or "useless
and
spreading its uselessness to all its descendants"? :)
Both I guess. It didn't actually change the display. It was supposed to
I just realized that "seminally useless" could also mean "unable to have
descendants", as in "its sperm is useless". :)
Do you know of
a program that actually read that switch? The expansions
that made the ][+ into the //e and //c were rather complicated, and yet not
complete enough (I wish they had made all the soft switches readable --
I hate write-only registers).
Yes, it would have been nice in some (very very very) rare instances to
know what graphics mode you were in, for instance. Or what bank of memory
you were in. Mostly from a cracking standpoint I guess.
Writing a debugger is what I had in mind. In that case the feature is
vital. Otherwise it's pretty unimportant. I still hate write-only
registers on principle. (Because then the OS has to keep a copy, and you
have to trust that people won't use the real register, etc.)
No, but I do
know that the same feature existed on the //e (i.e. before
the //c came out) but it was only accessible by changing internal
wiring. I read about this in an issue of Call A.P.P.L.E. which (of
course) I no longer have.
Wow, crazy. I never knew that, or even heard of it. In fact I want to
see a source before I believe it :)
You find me an archive of Call A.P.P.L.E. magazines, I'll find you a source.
-- Derek