Text 17320, 49 rader
Skriven 2006-04-06 22:25:00 av ED VANCE (1:123/140)
     Kommentar till en text av MARK LEWIS
Ärende: What Is This???
=======================
ML>my first impression was, with that 21 up there, that it was an INT21 call bu
ML>my mind's eye tells me that INT21 calls would represent "21" in HEX instead
ML>decimal O:)

ML>[minutes pass]

ML>however, it seems that my first impression is spot on ;)

ML>===== quote =====

ML>C:\>debug
ML>-e 100
ML>0AD3:0100  00.B8   00.00   00.4C   00.CD   00.21
ML>-u
ML>0AD3:0100 B8004C        MOV     AX,4C00
ML>0AD3:0103 CD21          INT     21

ML>===== quote =====

ML>it =IS= an INT21 call... now to dig in ralf brown's Interrupt List...

ML>[minutes pass]

ML>ahh! it is the "old" terminate process / end program code ;) O:)
-----snip------
ML>i knew i recognised it but it has been a very long time since i
played with ML>that ASM level style code :)

ML>FWIW: when i _first_ saw the above tagline and comments, i actually thought
ML>was one of the reboot calls... somewhere around here, i have a few 4byte (or
ML>so) .COM files that reboot the system... one does a "cold" reboot while anot
ML>does a "warm" reboot... another that i remember having did a reboot that
ML>stopped/froze at some point before the actual OS loader code was read from t
ML>bootdrive... that one took me forever to figure out the problem and where th
ML>stoppage was occuring O:)

Thanks Mark,

I appreciate your Tutorial on the code in my Tagline and reminder to use
Ralf Brown's list to search for answers such as this.

A long time ago I d/l a copy of Ralfs list but I haven't used it much
since I found out Machine Language is very hard to understand, and I've
gave up on trying to learn it.


 * SLMR 2.1a #T348 * Meeting Al Zheimer really Blew My Mind!
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