Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!mailrus!tut.cis.ohio-state.edu!bloom-beacon!athena.mit.edu!hackeron
From: hackeron@athena.mit.edu (Harris L Gilliam)
Newsgroups: comp.sys.cbm
Subject: Re: Loading machine language files.
Message-ID: <5724@bloom-beacon.MIT.EDU>
Date: 10 Jun 88 06:37:34 GMT
References: <5449@ihlpg.ATT.COM>
Sender: daemon@bloom-beacon.MIT.EDU
Reply-To: hackeron@athena.mit.edu (Harris L Gilliam)
Organization: Massachusetts Institute of Technology
Lines: 53

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
>seen programs that use LOAD statments to load other parts of the
>program and then jumps off to them (boot programs, etc).  However,
>when I have the program try to load the ML routine it seems to loop on
>that line, ei. it LED on the drive keeps going on and off.  The
>program is loaded because if I break and type in a RUN at the next
>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.  Even
>putting multiple statements on line 10 doesn't work.  The extra
>statements never get 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

Hi Mike,
	I think this will help. The problem is that the Commodore LOAD
command when used from within a program causes the program to run
again from the beginning without erasing the current variables. This
was included so that basic progs could be chained. To solve the
problem try this :

10 IF A=0 THEN A=1: LOAD "ML PROG AT $C000",8,1
20 POKE THE CIA REGS
30 OTHER BASIC STUFF
40 END


This should work as A will equal 0 when first run then it will be set
to 1 so that when the program re-executes the load will be skipped
over. 



						Harris



|    Harris L. Gilliam        ()Internet : hackeron@athena.mit.edu         |
|4 Ames St. Cambridge MA 02139()UUCP {backbone..}!mit-eddie!athena!hackeron|
+--------------------------------------------------------------------------+
*             There are no bugs, only unrecognized features.               *