Macalmanacii

MAC ALMANAC II, VERSION 1.0 - 4 JUNE 1990 You may have wondered, as I have, why nobody has ever come up with any kind of comprehensive listing of the Mac's ROM traps and global variables. So far, the lists in existence are scattered in many widely varying sources. For example, Apple's Inside Macintosh contains ROM trap listings in both alphabetical and numeric orders, but its global variable list is both incomplete and in alphabetic order only. Having lists ordered by memory address helps make debugging with TMON and Macsbug much easier. It also helps programmers using 68000 assembly language, such as myself. Apple's official policy is that programmers should use the names of variables when writing their programs. Their reasoning is that the use of names will prevent incompatibilities with future Macs and/or system files. I don't follow that policy for two reasons. First, the only way to create incompatibilities is for Apple to change the locations of some or all of the global variables in a future release of system software. Doing this would immediately invalidate the entire Macintosh software base, so I don't think Apple would seriously think of it. Secondly, encoding the actual addresses helps debugging since my source code becomes closer to the object code. This is efficient because I only have to look up variable names once when writing source code and eliminates multiple lookups when debugging with Macsbug. Normally I use variable addresses in my source code and place variable names in comment lines. After struggling with the separated lists, I decided to improve my productivity by centralizing all that information in a master file. This master file, MacAlmanac, has since helped me greatly. Its distribution as PD (Public Domain) made sense, so others could benefit as well. It would be a good idea to print this file in its entirety and three-hole punch it for placement in a binder. This file has been reformatted for printing on the LaserWriter, and for completeness, the laser font Times has been substituted for the screen font Geneva used in Almanac I. The master list will be a time-saver for you, regardless of what development system you are using (Pascal, C, BASIC, FORTRAN, Lisp, Forth, etc.). It will also help you if you disassemble bits of ROM code or other hacker stuff. Revision History: VERSION DATE PAGES CHANGES I 1.0 28 January 1987 26 Created, first release I 1.1 12 May 1987 27 Added: Errors on Powerup I 1.2 25 October 1987 29 Added: Traps & Keyboards I 1.3 16 December 1987 29 Altered pages 19, 27, and 28 I 1.4 30 December 1987 29 Fonts table reorganized (Page 26) I 1.5 18 April 1988 30 Added: new global v…