[LispM-Hackers] Function calling
Thu, 18 Oct 2001 17:16:08 -0500
Date: 15 Oct 2001 18:00:55 -0800
From: firstname.lastname@example.org (James A. Crippen)
When we try to activate
a stack group that has all this information, how do we interpret it?
That I don't have a good answer for yet.
From what I can tell by reading your message (and I haven't read it
*too* carefully) we still need the A-memory because a lot of state
and random flags and values get written there. Mouse stuff, TV stuff,
etc. Lisp seems to know a lot about things in the A-memory, as well.
I think a piece of the address space actually maps to A-memory. I do
know that some variables (mouse and TV stuff, as you noted) actually
have their value cells in A-memory, to allow Lisp access to microcode
variables (and vice versa).
Basically then the indicators could be implemented by an e3u32 stuck
into a random class. Is it allowed to have *any* value or just T or
I think any value -- MEMBER returns either NIL or the matching sublist,
for example -- but it may not matter if the only visible effect is to be
NIL or not.