DECO

Owned by CIMON (Unlicensed)
Jul 06, 2023
2 min read

DECO, DECOP, ENCO, ENCOP

 

DECO instruction decodes (n) number of source and sets the decoded bit(2^n) among the total of bits in the Destination.

ENCO instruction encodes source as 2^n and sets the encoded bit(n) to the Destination (encoding start point is b0).

 

 

S

Source

D

Destination

n

Number of bit to be decoded or encoded

 

Instruction

Device address

No. of Steps

Flag

M

X

Y

K

L

F

T

C

S

Z

D

@D

Int.

Error

Zero

Carry

DECO(P)

ENCO(P)

S

o

o

o

o

o

o

o

o

-

o

o

o

o

4

o

-

-

D

o

-

o

o

o

-

o

o

-

o

o

o

-

n

o

o

o

o

o

o

o

o

-

o

o

o

o

 

DECO, DECOP

  • When enabled, the DECO instruction decodes (n) number of source and sets the decoded bit () among the total of bits in the Destination.

  • You can choose 1~8 for (n).

  • If n is 0, there will be no change in the Destination.

 

Example)

If M00 is ON, DECOP instruction decodes 3 number of source (X00, X01, and X02).

As X00 and X01 are 1, the decimal value is 3 so decoded value is 8.

In 16bit binary, 8 is 4th bit. Therefore, M13 is set to 1.

 

 

 

 

ENCO, ENCOP

  • When enabled, the ENCO instruction encodes source as and sets the encoded bit(n) to the Destination (encoding start point is b0).

  • You can choose 1~8 for (n).

  • If n is 0, there will be no change in the Destination.

 

Example)

If X00 is ON, ENCOP instruction encodes.

In 16bit binary, D8 and D9 are set to 1.