Online HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens
INS - Input String from Port (80188+)
Usage: INS dest,port
INSB
INSW
INSD (386+ only)
Modifies flags: None
Loads data from port to the destination ES:(E)DI (even if a
destination operand is supplied). (E)DI is adjusted by the size
of the operand and increased if the Direction Flag is cleared and
decreased if the Direction Flag is set. For INSB, INSW, INSD no
operands are allowed and the size is determined by the mnemonic.
Clocks Size
Operands 808x 286 386 486 Bytes
dest,port - 5 15 17 1
dest,port (PM) - 5 9/29 10/32/30 1
none - 5 15 17 1
none (PM) - 5 9/29 10/32/30 1
- 386+ protected mode timings depend on privilege levels.
first number is the timing if: CPL >= IOPL
second number is the timing if: CPL > IOPL
third number is the timing if: virtual mode on 486 processor
- see Instruction Timing
[helppc.bosbyte.nl] ins