Remote-processing BASIC 52 Instrukcja Użytkownika Pobierz pdf (Strona 47)

RPBASIC-52 PROGRAMMING GUIDE

2-28

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)

Cards: All

DESCRIPTION

The D BY instruction retrieves or assig ns a value to the 8052 internal data m emory. 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.

RPBASIC-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.

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

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 162 163

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Remote-processing BASIC 52 Instrukcja Użytkownika Strona 47