4-4 Format for GCR Question

["Bryan Parkoff" <BParkoff@satx.rr.com>]

4-4 Format for GCR Question

    I know how to use ASL and AND opcode to put two bytes into one byte.

For example:

c0 c1 c1 c0
c1 c1 c1 c0

With ASL

0c 1c 1c 0c
c1 c1 c1 c0

With AND

01111100

    It is how I can see above.  My question is -- How can I add '1' to each
bit before one byte can become two bytes?  Which instruction (opcode) do I
use?  Please advise.

--
Yours Truly,

Bryan Parkoff
BParkoff@satx.rr.com