Hi Joanna,
Where the heck did you find *that*??? I would have said I'd never heard of it - and I can't find any more recent reference to it. But it turns out I *do* have an old version in my "archives". It "expired" June 1, 2000. The author - Bill Clayton, apparently - asks that we not monkey with the expiration date, but obtain a new version. He says it's easy to do, and a little investigation proves that to be correct. The routine in question starts at 243, with a call to the dos "date" function. I found that if I assemble "jmp 262" at that address and save the result back, it'll run. ("Look, Ma! I'm a cracker!")
I put the original file I've got at:
http://home.comcast.net/~fbkotler/ddt-v001.zipThat's already contrary to the author's wishes - I really don't want to distribute the "fixed" version. If you want to try it, and have trouble "fixing" it yourself, I'll send you the "fixed" version privately - fbkotler
comcast net
To be honest, I wasn't too impressed - I didn't RTFM, and didn't play with it long... maybe it has virtues that I missed...
The dos debugger I usually used is David Lindauer's GRDB - "like debug", only lots smarter. The last version I looked at didn't get the length of the command line right, but otherwise very nice. Knows about 32-bit registers, FPU registers... stuff like that, which DEBUG falls over on.
http://members.tripod.com/~ladsoft/grdb.htm
When you're ready to start "doing Windows" - unless you "graduate" to Linux, instead - "Ollydebug" seems pretty nice...
Best,
Frank
