Path: utzoo!attcan!uunet!lll-winken!lll-lcc!ames!ncar!gatech!emcard!mat
From: mat@emcard.UUCP (Mat Waites)
Newsgroups: comp.sys.cbm
Subject: Re: Loading machine language files.
Message-ID: <5657@emcard.UUCP>
Date: 10 Jun 88 19:00:50 GMT
References: <5449@ihlpg.ATT.COM>
Reply-To: mat@emcard.UUCP (Mat Waites)
Organization: Emory University Cardiac Data Bank
Lines: 45

In article <5449@ihlpg.ATT.COM> mnelson@ihlpg.ATT.COM (Nelson) writes:
>I am writing a program that uses a ML routine at $C000.  I know I have
...
>line the program will work fine.  The code looks like this:
>
>    10 LOAD "ML PROG AT $C000",8,1
>    20 POKE THE CIA REGS
>    30 OTHER BASIC STUFF
>    40 END
>
>If I put a PRINT statement at line 20 it will never be hit.
>
>Does anyone out there know a trick to get this to work, or do I have
>to load the ML through DATA statements?  Is the $C000 location the 
>problem?
>
>Mike Nelson
>ihnp4!ihlpg!mnelson
>AT&T Bell Labs

The problem is that commodore basic is strange. Every LOAD is treated
as if you are loading another basic program. The interpreter runs
the basic program in memory from the beginning after the load is finished.
Of course, in your case, it is the same basic program as you started with.

You need a little kludgeyness to pull it off:


    05 IF A = 1 THEN 20
	07 A = 1
    10 LOAD "ML PROG AT $C000",8,1
    20 POKE THE CIA REGS
    30 OTHER BASIC STUFF
    40 END

This way, A is 0 the first time through and the ML is loaded.
When your program runs the second time, it skips the load.

Mat


ps - just get a Power C compiler and give up on basic
-- 
  W Mat Waites                     |  PHONE:  (404) 727-7197
  Emory Univ Cardiac Data Bank     |  UUCP:   ...!gatech!emcard!mat
  Atlanta, GA 30322                |