ZX-News #39 18 августа 1997

Features - Features of the hard disk drive in sub-TR-DOS.

   Features of the hard disk drive

           in sub-TR-DOS


  The special features of such work include
Some program restrictions ... That
does this mean? Prepare to be that some programs will not work 
with hard drive. These programs are divided into

two categories:


  1) Programs that do not use for disk or file level, not the 
point login 03d13h. Such programs are "closely related" 
communicating with the controller drive how various disk 
utilities, copiers protected floppies and just playing with the 
turbo-loaders will not work with the hard disk. For this 
reason, had to abandon the installation of a ROM-drive such a 
popular file-shell as Honey Commander. Also, some programs 
continue to work with a fixed disk drive "A", ie without 
checking with a precisely drive they were launched.



  2) Programs that use non-standard
means of protection against hacking and view
monitor-debugger Shadow Service Monitor. For non-standard 
defenses include the partial or complete change of content 
eighth page of RAM used by the Shadow Monitor to store its 
variables, and just to share information with the hard

disc.


  Programmers remember: directing their
program to work with Scorpion'om provides the disc through the 
point 03d13h, as is already done in many

programs, such as Macro-Modem and Macro-Modem/BBS. If you are 
trying to defend his program from being viewed by the debugger, 
then use the function of interrupt 85h RST 8.