Difference between revisions of "Machine language"
From ThorstensHome
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This shows a mapping of x86 machine language to assembler | This shows a mapping of x86 machine language to assembler | ||
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| − | + | 00 01 add BYTE PTR [bx+di],al|| | |
| − | + | 00 41 41 add BYTE PTR [bx+di+0x41],al|| | |
| − | + | 00 ff add bh,bh || | |
| − | + | 0a .byte 0xa || | |
| − | + | 40 inc ax || | |
| − | + | 41 inc cx || | |
| − | + | 42 inc dx || | |
| − | + | 43 inc bx || | |
| − | + | 44 inc sp || | |
| − | + | 45 inc bp || | |
| − | + | 46 inc si || | |
| − | + | 47 inc di || | |
| − | + | 48 dec ax || | |
| − | + | 49 dec cx || | |
| − | + | 4a dec dx || | |
| − | + | 4b dec bx || | |
| − | + | 4c dec sp || | |
| − | + | 4d dec bp || | |
| − | + | 4e dec si || | |
| − | + | 4f dec di || | |
| − | + | 50 push ax | |
| − | + | 51 push cx | |
| − | + | 52 push dx | |
| − | + | 53 push bx | |
| − | + | 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. | |
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Revision as of 11:12, 14 December 2014
This shows a mapping of x86 machine language to assembler
00 01 add BYTE PTR [bx+di],al|| 00 41 41 add BYTE PTR [bx+di+0x41],al|| 00 ff add bh,bh || 0a .byte 0xa || 40 inc ax || 41 inc cx || 42 inc dx || 43 inc bx || 44 inc sp || 45 inc bp || 46 inc si || 47 inc di || 48 dec ax || 49 dec cx || 4a dec dx || 4b dec bx || 4c dec sp || 4d dec bp || 4e dec si || 4f dec di || 50 push ax 51 push cx 52 push dx 53 push bx 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.
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