Scott McLoughlin, would you comment?

[fire-l@xxxxxxxxxxxxxxxxx (fire-l)]

From: "Rick Hohensee" <hohenzay@tmn.com>
To: fire-l@artopro.mlnet.com
Date: Mon, 29 May 1995 11:40:02 -0400 (EDT)
Subject: Scott McLoughlin, would you comment?
 
The MuP21 isn't a Forth engine, really.   Fetch   fetches a datum from
the address in the 'address register', not the top of the data stack.
This is similar to Bana's address stack, methinks. However, why didn't
Chuck make said register a stack? Maybe he has another structure or 
structures in mind. Or maybe he's leaving that for variation. But is 
there a good general case? 
 
ferinstance...
Let's say the MISC address register grows into a special 16 cell stack, 
where each cell has 8 additional bits which constitute two 4 bit pointers 
to other cells in the same address stack. The main pointer ( actually, 
pointer stack may be a better name for this entity) points to the object 
in memory, the object or atom. 
 
Question: what Lisp-like things can be done with this critter, in how 
many instructions additional to those required by a plain address 
register/stack? 
 
Rick Hohensee
 


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