Delta-electronics DELTA DUP-B User Manual download pdf (Page 358)

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101

Chapter 3 Creating and Editing Screens

 SWAP (Swap High-Byte and Low-Byte Data)

Equation

SWAP (Var1, Var2, Var3)

Explanation

Swap high-byte and low-byte of Var3 number of words starting at Var2 and save it in

memory starting at Var1.

Remark

 The calculation result can be stored as unsigned WORD.

 Var1 and Var2 can be internal memory only. Var3 can be internal memory or

constant.

Example

Swap the high-byte and low-byte of $11 and store the result in $2 (this is an

operation of unsigned 16-bit data).

If $11 = 1234H, after executing SWAP command, $2 = 3412H.

 XCHG (Exchange Data)

Equation

XCHG (Var1, Var2, Var3)

Explanation

Exchange Var3 number of words of data starting at Var2 with the same number of

words starting at Var1.

Remark

 The calculation result can be stored as unsigned WORD.

 Var1 and Var2 can be internal memory only. Var3 can be internal memory or

constant.

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