LD

Name

Load index register to Accumulator

Function

The 4 bit content of the designated index register (RRRR) is loaded into accumulator.
The previous contents of the accumulator are lost.
The 4 bit content of the index register and the carry/link bit are unaffected..

Syntax

LD(R)

Assembled

Binary

1010 RRRR

Decimal

160, then incrementing by 1 until 175 (1st word).

Hexadecimal

0xA0, then incrementing by 1 until 0xAF (1st word).

Symbolic

 ../../_images/ld-sym.png

Execution

1 word, 8-bit code and an execution time of 10.3 \({\mu}\) sec

Side-effects

Not Applicable

Implemented

ld

Detailed Description

The contents of REG are stored into the accumulator, replacing the previous contents of the accumulator. The contents of REG are unchanged.

The carry bit and the accumulator are not affected.

../../_images/ld.png

Example program

The example program will load the contents of register 11 into the accumulator.

If register 11 contains the value 9 (1001b), then after this program is executed, the accumulator will contain 9 also.

/ Example program
LD    11
END