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Instruction Set

All excerpts are from the "KUE-CHIP2 Educational Board Reference Manual"

Abbreviation Instruction code (First) B' (Second) Instruction Function Overview
NOP 0 0 0 0 0 - - - No OPeration
HLT 0 0 0 0 1 - - - HaLT Halt
0 1 0 1 - - - - Unused (HLT)
OUT 0 0 0 1 0 - - - OUTput (ACC)→OBUF
IN 0 0 0 1 1 - - - INput (IBUF)→ACC
RCF 0 0 1 0 0 - - - Reset CF 0→CF
SCF 0 0 1 0 1 - - - Set CF 1→CF
Bcc 0 0 1 1 cc Branch cc If the condition is satisfied, B'→PC
Ssm 0 1 0 0 A 0 sm Shift sm (A)→shift, rotate→A
Overflowing bit→CF
Rsm 0 1 0 0 A 1 sm Rotate sm
LD 0 1 1 0 A B LoaD (B)→A
ST 0 1 1 1 A B STore (A)→B
SBC 1 0 0 0 A B SuBtract with Carry (A)-(B)-CF→A
ADC 1 0 0 1 A B ADd with Carry (A)+(B)+CF→A
SUB 1 0 1 0 A B SUBtract (A)-(B)→A
ADD 1 0 1 1 A B ADD (A)+(B)→A
EOR 1 1 0 0 A B Exclusive OR (A)⨁(B)→A
OR 1 1 0 1 A B OR (A)∨(B)→A
AND 1 1 1 0 A B AND (A)∧(B)→A
CMP 1 1 1 1 A B CoMPare (A)-(B)

A

B'

B

cc: Condition Code

A 0 0 0 0 Always
VF 1 0 0 0 on oVerFlow
NZ 0 0 0 1 on Not Zero
Z 1 0 0 1 on Zero
ZP 0 0 1 0 on Zero or Positive
N 1 0 1 0 on Negative
P 0 0 1 1 on Positive
ZN 1 0 1 1 on Zero or Negative
NI 0 1 0 0 on No Input
NO 1 1 0 0 on No Output
NC 0 1 0 1 on Not Carry
C 1 1 0 1 on Carry
GE 0 1 1 0 on Greater than or Equal
LT 1 1 1 0 on Less Than
GT 0 1 1 1 on Greater Than
LE 1 1 1 1 on Less than or Equal

sm: Shift Mode

RA 0 0 Right Arithmetically
LA 0 1 Left Arithmetically
RL 1 0 Right Logically
LL 1 1 Left Logically