An Apple ][ Memory Test

By Bob Huelsdonk

I wrote this simple program to test new memory chips I bought. Just store the correct end address for your Apple in locations 4 and 5, run 300G and display 800 to the end.

300.32A
0300- A0 00 A9 55 91 02 D1 02
0308- D0 1D A9 AA 91 02 D1 02
0310- D0 15 20 18 03 90 EB 60
0318- A5 02 C5 04 A5 03 E5 05
0320- 3A FF 00

– 4C 42 00 08 FF BF 51 18(?)
SL SH EL EH

SL= START ADS LO   EL= END ADS LO
SH= START ADS HI   EH= END ADS HI

IF MEMORY PERFECT *800.BFFF Displays all AA (for 48K)

EDITORS NOTE: This article has been recovered from very unreadable pages and may not be correct.

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About the Author

Bill Martens

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.