Re: lab 5 PAL-based game

Ed Casas (edc@ece.ubc.ca) Thu, 8 Apr 1999 08:08:21 -0700 

Date: Thu, 8 Apr 1999 08:08:21 -0700
From: Ed Casas <edc@ece.ubc.ca>
Subject: Re: lab 5 PAL-based game



> Could you please clarify how an if statement would be implemented in the
> CUPL listing.
> 
> example: for "if x<3, then y=0, else y=1"
> where does the declaration  	# if x < 3	go?

You can't do this.  CUPL (as we use it) only deals with bits and
logical operators (and, or, not, etc), it has no integer
variables, if-statements or comparison operators.

Note that CUPL statements "execute" concurrently, not
sequentially.

You can't implement algorithms in CUPL, only state machines and
combinational logic (written as logical expressions).

-- 
Ed Casas   edc@ece.ubc.ca   http://casas.ece.ubc.ca   +1 604 822-2592