IP2022 User’s Manual—Register Quick Reference www.ubicom.com 423 DC Digit Carry bit. After addition, set if carry from bit 3 occurred,
otherwise cleared. After subtraction, cleared if borrow from bit
3 occurred, otherwise set. 0 =   Last addition did not generate carry out of bit 3, or           last subtraction generated borrow out of bit 3.
1 =   Last addition generated carry out of bit 3, or last subtraction did not generate borrow out of bit 3. C Carry bit. After addition, set if carry from bit 7 of the result
occurred, otherwise cleared. After subtraction, cleared if bor-
row from bit 7 of the result occurred, otherwise set. After rotate
(rr or rl) instructions, loaded with the LSB or MSB of the
operand, respectively. 0 =   Last addition did not generate carry out of bit 7, last           subtraction generated borrow out of bit 7, or last
          rotate loaded a 0.
1 =   Last addition generated carry out of bit 7, last sub- traction did not generate borrow out of bit 7, or last
rotate loaded a 1. Name Description