Path: utzoo!attcan!uunet!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!hplabs!hp-ses!hpcuhb!hpindda!tribby
From: tribby@hpindda.HP.COM (David Tribby)
Newsgroups: comp.sys.apple
Subject: Re: Apple Pascal
Message-ID: <6230032@hpindda.HP.COM>
Date: 1 Jun 89 17:52:41 GMT
References: <8905312202.aa17727@SMOKE.BRL.MIL>
Organization: HP Information Networks Group/Cupertino CA
Lines: 23

V133JR65@UBVMSC.CC.BUFFALO.EDU ("J.WIXSON") writes...
> I just recently got out my old copies of Apple Pascal v1.3 or something and
> couldn't find a program that I picked up a while back that allowed me to
> directly use machine language routines from the pascal program.  

If you want to write your own machine language, use SYSTEM.ASSEMBLER :-).

If you mean the built-in Apple II ROM routines, be careful! Seems like I
read about such a program in a CALL A.P.P.L.E. book that collected articles
on Apple Pascal (published in the early '80s). Since Apple Pascal runs in
the Language card, any program that calls the ROM must enable the ROM
address space before the call and re-establish the proper RAM bank before
returning to the P-system. Also watch out for modifications to zero
page that might step on P-system variables!

It's also possible to call the P-system's BIOS routines (without too much
trouble) from your own assembly language or Pascal code. 

So...which machine language routines do you want to call?

--Dave Tribby
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