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Individual Instruction Descriptions
4-105Assembly Language Instructions
4.14.21 IN Input From Port Into Word
Syntax
[label] name dest, src1 Clock, clk Word, w With RPT, clk Class
IN {adrs}, port4 Table 4–46 Table 4–46 6a
IN An[~], port6 1 1 n
R
+3 6b
Execution dest ⇐ content of port6 or port4
PC ⇐ PC + w
Flags Affected dest is An: OF, SF, ZF, CF are set accordingly
dest is {adrs} XZF, XSF are set accordingly
Opcode
Instructions 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
IN {adrs}, port4
1 1 0 0 0 port4 adrs
x dma16 (for direct) or offset16 (long relative) [see section 4.13]
IN An[~], port6 1 1 1 0 1 1 0 An port6 ~A
Description Input from I/O port. Words can be input to memory from one of 16 port
addresses or one of 48 port addresses. The port4 address is multiplied by 4
to get the actual port address.
See Also INS, OUT, OUTS
Example 4.14.21.1 IN *R0, 0x0c
Input data from port address 0x0c * 4 = 0x30 to data memory location pointed by R0.
Example 4.14.21.2 IN A2~, 0x3d
Input data from port address 0x3d to accumulator A2~.