Re: where to find the applesoft start of program pointer

[jbush@magnus.acs.ohio-state.edu (J Eric Bush)]

In article <9302140734.AA28953@apple.com> ST2975@SIUCVMB.SIU.EDU writes:
>I think one place is in the auxilliary filetype of the applesoft
>basic file.  I'm not sure if basic.system handles it automatically
>though.

The start of Applesoft Program Pointer is located on Zero Page in Addresses
103 (low byte) and 104 (high byte).  Normal values are 103:1 and 104:8.  If
you want to re-set these values, you must also put a 0 in the location before
the location where the pointers point to.  Then you must re-run or load the
program.  Here is an example to set the Start of Applesoft to location 16385.

10 IF PEEK(103)<>1 and PEEK(104)<> 64 THEN POKE 16384,0:POKE 103,1:POKE 104,64
   PRINT CHR$(4)"-PROGRAM"

This will make sure that the program gets run in memory where you want it to.

Eric
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J. Eric Bush
Internet: jbush@magnus.acs.ohio-state.edu