Input and Output Group
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Mnemonic Symbolic Flags (bit 7-0) Instruction Number Number of Number of Comments
operation S Z . H . V N C opcode of bytes M cycles T states
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IN A,(n) A <- (n) * * X * X * * * 11 011 011 (DBh) 2 3 11 n to A0 - A7
-- <n> --- Acc to A8 - A15
IN r,(C) r <- (C) ? ? X ? X P 0 * 11 101 101 (EDh) 2 3 12 C to A0 - A7
if r = 110, only flags is affected 01 <r> 000 B to A8 - A15
INI (HL) <- (C) X ? X X X X 1 * 11 101 101 (EDh) 2 4 16 C to A0 - A7
B <- B-1 (1) 10 100 010 (A2h) B to A8 - A15
HL <- HL+1
INIR (HL) <- (C) X 1 X X X X 1 * 11 101 101 (EDh) 2 5 21 (B<>0) C to A0 - A7
B <- B-1 10 110 010 (B2h) 2 4 16 (B=0) B to A8 - A15
HL <- HL+1 Repeat until B=0
IND (HL) <- (C) X ? X X X X 1 * 11 101 101 (EDh) 2 4 16 C to A0 - A7
B <- B-1 (1) 10 101 010 (AAh) B to A8 - A15
HL <- HL-1
INDR (HL) <- (C) X 1 X X X X 1 * 11 101 101 (EDh) 2 5 21 (B<>0) C to A0 - A7
B <- B-1 10 111 010 (BAh) 2 4 16 (B=0) B to A8 - A15
HL <- HL-1 Repeat until B=0
OUT (n),A (n) <- A * * X * X * * * 11 010 011 (D3h) 2 3 11 n to A0 - A7
-- <n> --- Acc to A8 - A15
OUT (C),r (C) <- r * * X * X * * * 11 101 101 (EDh) 2 3 12 C to A0 - A7
01 <r> 001 B to A8 - A15
OUTI (C) <- (HL) X ? X X X X 1 * 11 101 101 (EDh) 2 4 16 C to A0 - A7
B <- B-1 (1) 10 100 011 (A3h) B to A8 - A15
HL <- HL+1
OTIR (C) <- (HL) X 1 X X X X 1 * 11 101 101 (EDh) 2 5 21 (B<>0) C to A0 - A7
B <- B-1 10 110 011 (B3h) 2 4 16 (B=0) B to A8 - A15
HL <- HL+1 Repeat until B=0
OUTD (C) <- (HL) X ? X X X X 1 * 11 101 101 (EDh) 2 4 16 C to A0 - A7
B <- B-1 (1) 10 101 011 (ABh) B to A8 - A15
HL <- HL-1
OTDR (C) <- (HL) X 1 X X X X 1 * 11 101 101 (EDh) 2 5 21 (B<>0) C to A0 - A7
B <- B-1 10 111 011 (BBh) 2 4 16 (B=0) B to A8 - A15
HL <- HL-1 Repeat until B=0
(1) If the result of B-1 = 0, then Fz = 1, otherwise Fz = 0.