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Volume 6 -- Issue 3                  December, 1985



In This Issue...



ProDOS MLI Tracing . . . . . . . . . . . . . . . . . . . .  2
Ohio Systems Kache Card. . . . . . . . . . . . . . . . . .  8
More Puzzle Solutions. . . . . . . . . . . . . . . . . . . 10
S-C Macro Assembler Quick Reference Booklet. . . . . . . . 14
Using Pseudo-Variables in Machine Language . . . . . . . . 16
Computing Day of the Week. . . . . . . . . . . . . . . . . 20




Little RAM Disk Bug

Does that mean a Bug in the Little RAM Disk, or a Little Bug in the RAM Disk?  Actually, both.  Several of you have called or written to point out a problem in Bob's program last month.

The TAY instruction at line 1280 (on page 8) should be a TYA.  It does seem pointless to force Y to zero and then immediately clobber it with whatever the processor read out of $C083.  This code worked when Bob tested it on his //e, because that computer does return a zero when you read $C083.  My ][+, on the other hand, returns a byte of video data, usually $A0, and that really makes a mess out of the VTOC and Catalog sectors.

There's one other glitch in that article as well.  In the fifth paragraph on page 5 there is a reference to line number "189~".  I bet you can guess that's really supposed to be "1890".

So, thanks to all of you who caught us on this one!  It's nice to know you're keeping an eye on us.
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Apple Assembly Line is published monthly by S-C SOFTWARE CORPORATION, P.O. Box 280300, Dallas, Texas 75228.  Phone (214) 324-2050.  Subscription rate is $18 per year in the USA, sent Bulk Mail; add $3 for First Class postage in USA, Canada, and Mexico; add $14 postage for other countries.  Back issues are available for $1.80 each (other countries add $1 per back issue for postage).

All material herein is copyrighted by S-C SOFTWARE CORPORATION, all rights reserved.  (Apple is a registered trademark of Apple Computer, Inc.)

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