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In this example, one function serves to sum the elements
in arrays of different types. This is not possible in Apple II
Pascal, so any programs on the Apple/// would have to be
modified for use on the II.
UCSD Pascal, Version IV
Where do I begin? Get this:
In General:
* Compiler option selectable native code generation;
A third difference between the Pascals is the larger
number of effective segments allowed in the Apple // /
program. Each such program is permitted 16 segments or
regular units, 16 units from the System Library, and 16
intrinsic units from a program library for a total of 48 segments
or units! If you get accustomed to this feature, you
will have trouble moving your programs to an Apple II.
* Double precision real arithmetic;
* An enhanced System Editor including "tabstop," "exchange
delete," and "exchange insert" commands;
* Complete freedom to redirect program and system 1-0
from the X( ecute command line and from within programs;
* Up to 256 units or segments per program, all units intrinsic,
no linking;
One way to solve potential portability problems is to
program to the lowest common denominator; to not use
the" new" features of the more powerful machines. Another
way is to abandon the Apple II entirely; after all, you probably
so.Id it to get the money to buy the ///, right? Better, in my
opinion, would be to implement these features for the II.
(C'mon, guys, you can do it!) Arid while we're at it, why not
kick in a type "realstream," or better yet, conformant arrays,
the generalization of these "streams."
* A program's units can reside in any library;
* Every library has room for 256 units;
* File variables allowed in the interface section of units,
segment procedures allowed in the implementation section
(not possible in the Apple Pascals);
* Units can use other units in their implementation section
as well as in their interface;
* Turtlegraphics. Not source code compatible with Apple's.
Some of my friends rather strongly disagree with me
here. They like what they have on the II, and aren't interested
in seeing it changed. You may agree with them. In fact, you
may not care at all. Again, it depends on you and your goals.
* Chaining;
* A " screen ops" unit to control the screen, including access
to the system date;
78 Apple Orchard