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中国DOS联盟论坛 The time now is 2026-08-18 09:49 |
47,814 topics / 349,907 posts / today 0 new / 48,259 members |
| DOS学习入门 & 精彩文章 （教学室） » DOS Tidbit--Characteristics of COM Files |
| Printable Version 2,077 / 1 |
| Floor1 ko20010214 | Posted 2002-10-22 00:00 |
| 版主 Posts 1,628 Credits 7,296 | |
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1。Only one segment can be set.
2。Program length must be less than 64K 3。100H of space must be reserved, and there must be an executable instruction at the beginning. 4。Subroutines must have the near procedure attribute (near) 5。If there are multiple object modules, all modules must have the same code segment name and class name (class), and be assigned the public attribute (public); the main module should have an entry pointer at 100H and be linked first. |
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| Floor2 6618 | Posted 2003-06-30 00:00 |
| 中级用户 Posts 54 Credits 356 | |
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After reading it, I learned a little something. In WIN, for some executable commands you don't need to look at
the extension (usually extensions are hidden); if it is larger than 64K, you can be sure it is .EXE and not >.COM! Support!!! |
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