Int 21h pdf

Sign up or log in Sign up using Google. Sign up using Facebook. Geoffrey 6, 2 17 By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. It takes the interrupt number formatted as a byte value. Depending on the context, compileror assemblera software interrupt number is often given as a hexadecimal value, sometimes with a prefix 0x or the suffix h.

Stack Overflow works best with JavaScript enabled. Philip Kirkbride 7, 26 82 Post as a guest Name. Viewed k times. For example: mov ah,01h int 21h Which should read a key from the user.

Improve this question. Peter Cordes k 41 41 gold badges silver badges bronze badges. Add a comment. Active Oldest Votes. Improve this answer. Philip Kirkbride Geoffrey Geoffrey 9, 3 3 gold badges 28 28 silver badges 43 43 bronze badges. Abraham Jacob Abraham Jacob 71 1 1 silver badge 1 1 bronze badge. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Other INT instructions are encoded using two bytes.

Sign up or log in Sign up using Google. From Wikipedia, the free encyclopedia. Email Required, but never shown. This is accomplished by entering a bit value corresponding to a kernel function into the EAX register of the processor and then executing INT 0x Most Unix systems and derivatives do not use software interrupts, with the exception of interrupt 0x80, used to make system calls.

By using our site, you acknowledge that you have read and unt our Cookie PolicyPrivacy Policyand our Terms of Service. Abraham Jacob 51 1 1. For example, INT 21H will generate the software interrupt 0x21 33 in decimalcausing the function pointed to by the 34th vector ont the interrupt table to be executed, which is typically a DOS API call. Sign up using Facebook.

By using this site, you agree to the Terms of Use and Privacy Policy. BOSS 8 23 The INT 3 instruction is defined for use by debuggers to temporarily replace an instruction in a running 12h in order to set a breakpoint. This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are as essential for the working of basic functionalities of the website.

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