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IN A,(N)

Load accumulator from port N.
Function: A <- (N)
 
Format:
1101 1011
 
byte 1: DB
 
NNNN NNNN
 
byte 2: port address
 
Description: The peripheral device N is read and the result is loaded into the accumulator.
The literal N is placed on lines A0 to A7 of the address bus.
The accumulator supplies bits A8 to A15.
 
Data Flow:
 
Timing: 3 M cycles; 11 T states: 5.5 usec @ 2 MHz
 
Addressing Mode: external
 
Flags:
 
(no effect)
 
Example:

OBJECT CODE
Before:
 
After: