Article: 7386 of alt.hackers From: Terje.Mathisen@hda.hydro.com (Terje Mathisen) Newsgroups: alt.hackers Subject: Re: YKYBPMTLW Date: 15 Feb 1995 11:18:06 GMT Organization: Hydro Data, Norsk Hydro (Norway) Lines: 52 Approved: Yes! Message-ID: email@example.com Reply-To: Terje.Mathisen@hda.hydro.com (Terje Mathisen) NNTP-Posting-Host: sk08ts.hda.hydro.com X-Newsreader: IBM NewsReader/2 v1.02 Status: RO
In <firstname.lastname@example.org>, email@example.com (Andy Dingley) writes: [deleted] >ObHack: > >> Using my ancient Amstrad PCW8256 > >One of my parent's neighbours lost the password to their accounts computer >last w/e, an old PC1512. I happened to be around, so got dragged over to fix >it. I had one of my own PCs sitting nearby, with all the file-hacking tools I >could want, but unfortunately only a 3.5" drive and no LapLink cable. I >*could* have made up a serial cable I guess, but instead I used DEBUG to >write a hex->ASCII filter and started TYPEing recent files through that and >MORE. I soon found a mis-spelt version of what looked like the right >password, and sure enough, we were in. > >OK, I cheated 8-) I wrote it in tiny C on my machine, printed a listing of >the OBJ and used that as a guide when flying DEBUG. I'll leave the >assembler-from-memory to people like Vik Olliver. 8-) > ObSimilarHack: Here's what I wrote last night, sitting at the console of a NetWare V4.02 file server, which I was going to upgrade to 4.1: The problem was that the server had a monochrome vga crt but was running in color mode, making it impossible to see which of several options was selected in the upgrade menues, so I wrote down the following script: mov ax,7 int 10 int 20 and hand-assembled that into b8 07 00 cd 10 cd 20 which became 184 7 0 205 16 205 32 in decimal. The only thing remaining was to use an editor that allowed zero bytes in "text" files to generate a 7-byte modemono.com program. Running this program in autoexec.bat tells the install program to use a color set compatible with a monochrome display. (No, I didn't have debug available, that would have been a lot easier ;-) -Terje Mathisen (include std disclaimer) <Terje.Mathisen@hda.hydro.com> "almost all programming can be viewed as an exercise in caching"