Optron #08 27 февраля 1998

Железо

Gluck - Bugs CDOS v1.32.

                   Gluck



(C) Taras Nikolaychuk
someone to the electronic edition. Nevertheless, in my vzgyad 
she bydet useful "Optocouplers" for several sobrazheniyam:


  - Why open finally arrived drygim known,
wasting precious time and money. Agree, unpleasant after a few 
hours with the new program yznat that dealer service tools for 
kotoryyu was assigned as hope works not quite correct (if

Too bad not say yet :-)), and only
a reward for your work bydet disappointment and a few epithets 
to the author; 

  - People who know the code yourself smogyt "finish" 
programmy, rather than wait until the grace of God shall come 
over as a new "Corrected" version.


  Today I hochy zatronyt very aktyalnyyu temy for our region - 
the software for organizing modem network. It's about CDOS 
v1.32, courtesy of programmers from Belarus. First of all, 
hochy noted the positive aspects of the program - setting for 
the different types of machines (split / total memory field), 
the correct management HISTORY, ny and most importantly - 
individyalnaya password e-mail system and a built-ZXWORD.


  And now for the glitches. The most "innocent" glitch
This software - a field phone number
(You) must be completely filled out.
If your city's phone number consists of 5 (6) digits, then all 
non-significant bits must be filled (but not spaces). Otherwise 
slychae (if BBS enabled SELECT USER) you are constantly

bydete They take joy notification of the
that the honor list, BBS users
you have not noticed.

  The second unpleasant moment in dvyh words and
can not explain. Dopystim, calls the user on the BBS. The 
program reads from the disk A file MEMWR, determines that the 
subscriber "a" and allows raboty. Member for joy download 
directory on drive B and a few dozen sekynd probyet note all 
the interesting files, for which he punishes BBS poveshaniem 
its trybki (in instryktsii ykazano, 90 sekynd in practice So 
why is something much less). Povtorno burst on BBS, the user 
achieves what CDOS again reads MEMWR (Disk A) ystanavlivaet 
tekyschy drive A, and merges nothing podozrevayuschemy user 
files with the names of the disk in, but with "Stuffing" drive 
A. I hope it is not necessary explain what the final reward for 
bydet. 

  To combat this scourge mogy offer one of the options - read 
MEMWR only once and keep a copy in the memory (of course this 
is only possible after completion of the program).


  Next. If the secret files hosted y
you do not have the "system" drive, then there is a very
greater likelihood that they will quickly
lose their sektretnost, as this
So why a regime pertains only to the
one disc.

  It was also ydivlenie work with gryzynom in the embedded 
ZX-WORD'e. Virtually no odny from the menu options can not 
call, yes and klaviatyry characters on the screen only after 
the motion manipylyatorom, ie after changing vnytrennih 
registers KEMPSTON MOUSE.


  There is another bad moment in the
CDOS, although I have not just make ydalos
zakonomernots his appearance. Sometimes,
file transmission time count transmitted
sectors, changes direction and begins
ymenshatsya to nylyu. The implications of this
Gluck predict fairly trydno as
this can take place at the beginning and
mid transfer files.

  In conclusion, hochy throw nebolshyyu
ideyky willing to "refine" CDOS. Catalog
transferred completely, ie all 9 sectors.
In practice, the "clogged" always on the strength of 3-4.
Predlyagayu transfer or transmit
only "employed" sector or compress any simple method.