Appending Applesoft

By Val J. Golding

Here are simple routines that will allow you to append programs in both version of Applesoft. While appending can be done under program control in App. II, it is really simpler to do it without. The routines are the same in both versions; only the pointers have been changed (to protect the innocent!). A word of caution: Apple soft programs store in memory just the opposite of Integer Basic, i. e., from the bottom up. Therefore, the first program appended should be the one with the lowest line numbers. You will get an error message in Ap. I, which should be disregarded. The secret is in changing the values of the pointers, 106 & 107 in App. I or 103 & 104 in App. II.  This hides the first program while the second is being loaded.  To do  this, these pointers must be set to equal the value of the program pointer, less 2.

In Ap. I the PP is 112 & 113; in Ap II it is 109 & 110. Here is the routine; just use the proper pointers for version I or II.

POKE 103, (PEEK(109)-Z)
POKE 104, PEEK(llO) I .
LOAD

POKE 103, l:POKE 104, 48 (for Ap. II)
POKE 106, I:POKE 107, 42 (for Ap. I)

Do not attempt to list, run, renumber, etc. until all of the routine has been completed or it will blow your Applesoft.

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About the Author

billm

A.P.P.L.E. Chairman of the Board and Club president — Bill worked for the founder, Val J. Golding and A.P.P.L.E. from 1981 to 1982. In 1999, he began archiving the materials which were distributed and sold by A.P.P.L.E.. That project led to the group that remained of A.P.P.L.E. Bill was involved in the financial industry in Tokyo and has over 20 major office infrastructure projects to his name. In March 2001, he retired to write books and to spend more time pursuing personal interests. As the president of the users group, Bill is in charge of distribution of Call-A.P.P.L.E. magazine as well as the organization of this web site. Bill currently resides in Tokyo, Japan and Shelton, Wa splitting time between the places.