Remote Processing BASIC 52 - Manual (Page 47)

RPBASIC-52 PROGRAMMING GUIDE
2-28
DBY
Syntax: A = D B Y (expr)
D B Y (expr)=variable
Where: expr = 0 to 255
variable = 0 to 255
Function: Read/write internal data memory.
Mode: Comm and, run
Use: DBY(0F0H ) = 45H
A=DB Y(100)
Cards: All
D E S C R IP T I ON
The D BY instruc tion ret rieves or assig ns a va lue to th e 8052 interna l data m emo ry. 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.
RPBAS IC-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
C B Y , X B Y
E R R O R
B A D A R G U M E N T Invalid expr value, such as DBY(256) or attempt to assign an invalid value to a
D B Y (expr), such as DBY(18H)=1000.
EXAMPLE
100 DBY(1EH ) = 234
1 1 0 P R I N T D B Y (1 E H )
>run
234