Difference between revisions of "Machine language"
From ThorstensHome
Line 9: | Line 9: | ||
|- | |- | ||
| 0a || .byte 0xa || | | 0a || .byte 0xa || | ||
+ | |- | ||
+ | | 40 || inc ax || | ||
|- | |- | ||
| 41 || inc cx || | | 41 || inc cx || |
Revision as of 10:24, 14 December 2014
This shows a mapping of x86 machine language to assembler
x86 machine language | assembler command | remark |
---|---|---|
00 01 | add BYTE PTR [bx+di],al | |
00 41 41 | add BYTE PTR [bx+di+0x41],al | |
0a | .byte 0xa | |
40 | inc ax | |
41 | inc cx | |
54 | push rsp | |
85 c0 | test eax,eax | |
90 | NOP | |
b8 00 00 00 00 | mov eax,0x0 | |
c3 | ret | |
cd 10 | int 10 | |
eb fd | short jump to executing the byte before eb | |
fa | cli | This will clear the interrupt flag in the processor meaning interrupts will not be processed after the flag is set again. This means a high risk - no more keyboard input etc.. So this is a privileged command and may only be executed by the operating system. |