Apple is not planning any updates to the package. However, "Inside Macintosh"
contains all the information you need to create the kind of XCMDs you require.
Further, the author of the toolkit XCMDs wrote a series of articles in
"MacTutor" (publication now known as MachTech) magazine describing AppleTalk
XCMDs including ADSP. The articles are an excellent source of information on
how it all works. The series ran from January through May of 1989.
Article Change History:
22 July 1993 - Company title changed from MacTutor to MacTech.