Notes on DDTZ25.DOC =================== Having downloaded DDTZ.LBR from my local RCPM BBS, I've greatly enjoyed working with it over the past several months. It's taught me a great deal about elementary debugging, assembler practice, and mental switching between 8080 and Z80 mnemonics. Furthermore, I particularly admire someone's fully successful efforts at upgrading and improving any of the basic Digital Research utilities included with most CP/M 2.2 installations; these tools should be among the most well-worn in any CP/M'er's toolbox. DDT (for Dynamic Debugging Tool) has an undeserved reputation for being obscure and difficult to use, but it certainly has its annoying shortcomings and quirky syntax. I'd say DDTZ pretty well fixes all that, as well as providing a much-expanded usefulness with extra functions and impressive capabilities. All in all, it well deserves some wider recognition and application, and so I'm pleased to serve it up in this "new, improved" package. Actually, all I've added here to the basic library of .COM and .DOC files is a thoroughgoing editing of the original documentation, which I found to be too sketchy, as if hastily flung together--more like rough notes than a full- blown "user's guide." I've taken the time and attention to reorganize, polish, and amplify the author's technical prose, and I'm finally satisfied enough with the results as to reassemble the library and reissue it to the public domain. The only fly in the ointment is that I've been unable to contact the author through BBS channels for approval of my efforts. Thus, I may possibly have misunderstood him on a few points, although I don't think so--most of my rewriting is on the basis of hours of actual application of his delightful little program to my various debugging projects, as well as careful checking of its each and every feature. In any case, "do it yourself" is the name of the game in the public domain, but I've not tampered with the object code (except to capitalize "NEXT PC SAVE" on the file report!), so his essential work remains intact until the next update emanating from him, whenever that may be. If my modest overhaul to his explanatory text serves only to attract more CP/M users to this utility, I shall be more than satisfied for my small contribution. George A. Havach San Francisco, Calif. (415) 282-3056 August 31, 1986 ore than satisfied for my small contribution. George A. Havach San Francisco, Calif. (415) 282-3056 Aug