5.90. Exchange Words in Registers

Addr
Mode  Mnemonic          Format/Opcode
                           8      4      4
                        ----------------------
R     XWR   RA,RB       |  ED  |  RA  |  RB  |
                        ----------------------

Description. The contents of register RA are exchanged with the contents of register RB. The CS is set based on the result in register RA.

Register Transfer Description.

(RA) <-->= (RB);
(CS) <-- 0010  if (RA) = 0;
(CS) <-- 0001  if (RA) < 0;
(CS) <-- 0100  if (RA) > 0;

Registers Affected. RA, RB, CS