NEC PD754244 Manuel D’Utilisation

User’s Manual  U10676EJ3V0UM

Function:  reg 

←

 reg+1; Skip if reg = 0

Increments the contents of register reg (X, A, H, L, D, E, B, or C).  If reg = 0 as a result, the next instruction is

skipped.

Function:  rp1 

←

 rp1+1; Skip if rp1 = 00H

Increments the contents of register pair rp1 (HL, DE, or BC).  If rp1 = 00H as a result, the next instruction is skipped.

Function:  (HL) 

←

 (HL)+1; Skip if (HL) = 0

Increments the contents of the data memory addressed by pair register HL.  If the contents of the data memory

become 0 as a result, the next instruction is skipped.

Function:  (mem) 

←

 (mem) + 1; Skip if (mem) = 0, mem = D

7-0

: 00H to FFH

Increments the contents of the data memory addressed by 8-bit immediate data mem.  If the contents of the data

memory become 0 as a result, the next instruction is skipped.

Function:  reg 

←

 reg–1; Skip if reg = FH

Decrements the contents of register reg (X, A, H, L, D, E, B, or C).  If reg = FH as a result, the next instruction

is skipped.

Function:  rp’ 

←

 rp’–1; Skip if rp’ = FFH

Decrements the contents of register pair rp' (XA, HL, DE, BC, XA', HL', DE', or BC').  If rp’ = FFH as a result, the

next instruction is skipped.