WMP

Name

Write RAM Port

Function

Write to a specified RAM port

Syntax

WMP

Assembled

Binary

11100001

Decimal

225

Hexadecimal

0xE1

Symbolic

 ../../_images/wmp-sym.png

Execution

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

Side-effects

Not Applicable

Implemented

wmp

Detailed Description

The contents of the accumulator are written to the output port associated with the DATA RAM chip selected by the last SRC instruction. The data is available on the output pins until a new WMP is executed on the same RAM chip. The LSB bit of the accumultor appears on O0, (Pin 16), of the 4002.

The carry bit and the accumulator are unchanged.

The opcode for this instruction does not contain any additional data:

../../_images/wmp.png

Example Program

The example program will write the value 6 to the output port associated with the DATA RAM chip 2 of the currently selected DATA RAM bank.

/ Example program
      FIM        3P  64
      SRC        3P
      LDM        6
      WMP