RCA 1800 Operator's Manual page 98

Appendix E - COSMAC Instruction Summary
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:I
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Branch Instructions - Long Branch
OP
INSTRUCTION MNEMONIC
CODE
LONG BRANCH LBR CO
NO LONG BRANCH NLBR C8·
(SEE LSKP)
LONG BRANCH IF D=O
LBZ C2
LONG BRANCH IF D NOT 0 LBNZ CA
LONG BRANCH ' IF DF=1 LBDF C3
LONG BRANCH IF DF=O LBNF CB
LONG BRANCH IF 0=1
LBO C1
LONG BRANCH.lF 0=0
LBNO C9
Skip Instructions
OP
INSTRUCTION MNEMONIC CODE
SHORT SKIP
SKP 38·
(SEE NBR)
C8· LONG SKIP LSKP
(SEE NLBR)
LONG SKIP IF D=O LSZ CE
LONG SKIP IF D NOT 0 LSNZ C6
LONG SKIP IF DF=1 LSDF CF
LONG SKIP IF DF=O LSNF C7
LONG SKIP IF 0=1 LSO CD
LONG SKIP IF 0=0 LSNO C5
LONG SKIP IF IE=1 LSIE CC
.NOTE: THIS INSTRUCTION IS ASSOCIATED WITH MORE THAN ONE
MNEMONIC. EACH MNEMONIC IS INDIVIDUALLY LISTED .
•• NOTE: THE ARITHMETIC OPERATIONS AND THE SHIFT INSTRUCTIONS
ARE THE ONLY INSTRUCTIONS THAT CAN ALTER THE DF.
OPERATION
M(R(P))~R(P).1
M(R(P) +1)~R(P).0
R(P) +2
IF D=O,
M(R(P))~R(P).1
M(R(P) +1)~R(P).0
ELSE R(P) +2
IF D NOT 0, M(R(P))~
R(P).1
M(R(P)
+1)~
R(P).O
ELSE R(P) +2
IF DF=1, M(R(P))~R(P).1
M(R(P) +1)~
R(P).O
ELSE R(P) +2
IF DF=O, M(R(P))~R(P).1
M(R(P) +1)~
R(P).O
ELSE R(P) +2
IF 0=1, M(R(P))~R(P).1
M(R(P) +1)~R(P).0
ELSE R(P) +2
IF 0=0,
M(R(P))~R(P).1
M(R(P) +1)~
R(P).O
ELSE R(P) +2
OPERATION
R(P) +1
R(P) +2
IF D=O, R(P) +2
ELSE CONTINUE
IF D NOT 0, R(P) +2
ELSE CONTINUE
IF DF=1, R(P) +2
ELSE CONTINUE
IF DF=O, R(P) +2
ELSE CONTINUE
IF 0=1, R(P) +2
ELSE CONTINUE
IF 0=0, R(P) +2
ELSE CONTINUE
IF IE=1, R(P) +2
ELSE CONTINUE