Anyone have book or link about 16-bit DOS/BIOS software-interrupts in x86 processors? [closed]

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Can anyone recommend a book or provide web references describing software interrupts in assembly language for x86-16?

For example,

mov ah,1
int 21h

to read one char.

Answer 1

8086 DOS and BIOS interrupts you mean?

http://www.ctyme.com/intr/int.htm