Large filesize a problem?

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peter_rk

Joined: 17 Apr 2005
Posts: 13
Location: somewhere in the world?

peter_rk 22 Nov 2005, 19:17

I've really only made DOS command-style files, I've been nervous to delve into any other type like EXE. Lately, I've been testing FASM and noticed a few disconcerting things. When a jump is too far away, it won't jump.

Is it possible that .COM files are limited in jump size, I believe they are! If so, you do I get around that?

22 Nov 2005, 19:17

Matrix

Joined: 04 Sep 2004
Posts: 1164
Location: Overflow

Matrix 22 Nov 2005, 19:47

well, com file is limited to 64 KBytes, so it is limited a bit, but you can always use jmp far to jump to 32 bit address,
jmp is macine instruction and is not restricted in a com file.

22 Nov 2005, 19:47

peter_rk

Joined: 17 Apr 2005
Posts: 13
Location: somewhere in the world?

peter_rk 25 Nov 2005, 05:38

Thank you, I am idiot as usual... Lazy of me not to look at EXE files for possibility.

25 Nov 2005, 05:38

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