Remote Processing BASIC for the CX-10 Modbus - Manual (Page 22)

BASIC PROGRAMMING GUIDE
2-13
DBY
Syntax: A=DBY(expr)
DBY(expr)=variable
Where: expr = 0 to 255
variable = 0 to 255
Function: Read/write internal data memory.
Mode: Command, run
Use: DBY(0F0H) = 45H
A=DBY(100)
DESCRIPTION
The DBY instruction retrieves or assigns a value to the 8052 internal data memory. expr and variable must
both must be between 0 and 255 since there are only 256 internal memory locations and one byte can only be
between 0 and 255.
BASIC-52 uses many internal memory locations for its own use. Change internal memory with caution or
Basic may malfunction. Locations 1BH through 21H may be used in any way you wish.
RELATED
CBY, XBY
ERROR
BAD ARGUMENT Invalid expr value, such as DBY(256) or attempt to assign an invalid value to a
DBY(expr), such as DBY(18H)=1000.
EXAMPLE
100 DBY(1EH) = 234
110 PRINT DBY(1EH)
>run
234