מבנה הזיכרון

[LB_]

בקוד לדוגמא של אחד השורדים מופיעים הפקודות הבאות:

@loop:
mov [bx], al
add bx, 8
jmp @loop

האם הקוד הבא תמיד ירוץ רק על הקוד סיגמנט ?

מישהו יכול להסביר לי קצת יותר על מבנה הזיכרון ואיך הוא משתקף בשרת ?

 

[BS_]

The command mov[bx], al will write the content of the register al to ds:bx,
for example if bx equals 123 then the command will set the 123rd byte in the data segment to al
in the CGX competition each survivor has 3 important segments:
The code segment- the code segment functions as both code and data area (cs=ds)
                                  this segment contain the code of the survivors and is the main place where things happen.
                                  all the survivors share the code (and data) segment.
the stack segment – the stack of the survivor which is used in push/pop/cal/return opcodes, this segment (ss register) is unique for
                                  for each survivor and surcicors cannot access the stack of other survivors
the team segment – this segment is a special 1024 bytes long segment (the es register) which is common for survivors of
                                  the same team. this segment may be used to communicate between survivors of the same team.

So, in conclusion:
cs=ds – main arena, common for everyone
ss – stack segment, unique per survivor
es – team segment, unique per team

Hope this answers you question.

[מאת]

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