CODEWITHSUNDEEP
assemblyx8664-bitnasm
mee
mee

Reputation: 599

Which is the illegal instruction?

Well, I copied this code exactly from page 17 of http://www.tutorialspoint.com/assembly_programming/assembly_tutorial.pdf but when I compiled it with NASM (on windows even though in the pdf they use linux) using the command nasm -f elf test.asm -o test.com, and run it it spits this out at me:

16 bit MS-DOS Subsystem

dir The NTVDM CPU has encountered an illegal instruction.
CS:0000 IP:0077 OP:fo 37 05 0a 02 Choose 'Close' to terminate the application.

where dir is the location from which I compiled and ran the program (nasm directory). I hope I don't make a total tit out of myself for this, but it really is puzzling me. Thank you in advance!

Upvotes: 1

Views: 1718

Answers (1)

sandymatt
sandymatt

Reputation: 5612

int 0x80 ;call kernel

You're on windows -- dos even. The address you're using in this instruction (0x80) is Linux/Unix specific.

http://en.wikipedia.org/wiki/INT_(x86_instruction)

Upvotes: 3

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