INX
Syntax: INX Rhp
Where Rhp is the higher order register of the pair BC or DE or HL.
Byte: 1byte
Addressing Mode: Register Addressing
Working:
1.
2.
3.
4. Flag
Example: INX H
Where [HL]= 1000H
After execution of INX H
[HL]= 1001H
XCHG
Syntax: XCHG Rhp Where Rhp is higher order register the pair. ( BC or DE) Byte: 1byte Addressing Mode: Register Addressing Working: for execution of this instruction, microprocessor will allocate first byte for opcode and the operand is register which don't need allocation. After execution of this instruction content of register pair given as operand will get swapped with content of HL register pair . Example: XCHG B where [C]= 50H & [B] = 20 H, [H]= 80H & [L]= 60H (i.e. BC = 2050H and HL = 8060H) After execution of XCHG B [H]= 20 H & [L]= 50H [B]= 80H & [ C ]= 60H Program: Write ALP to swap content of BC with DE where [DE] = 4455H and [BC] = 1122H. Solution: Assume HL = 0000H Start: XCHG B ;BC= 0000H & HL = 1122H XCHG D ; HL= 4455H& DE= 1122H XCHG B ; HL = 00...
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