Remote-processing BASIC 52 Manual de usuario descargar pdf (Pagina 97)

RPBASIC-52 PROGRAMMING GUIDE

2-78

PEEKB

Syntax: PEEKB(segment,ad dress)

Where: segment = 0 to 7, specifies a 64K segment

address = 0 to 65535, byte address in a segment

Function: Reads a byte from RAM

Mode: Command, Run

Use: A = PEEKB(1,AD)

Cards: All

DESCRIPTION

This function is used in conjunction with POKEB. Data is retrieved from any memory location. PEEKB

inputs 1 byte of data. This function operates in much the same way as XB Y does except PE EKB can access

512K of RAM.

See POKEB command for addressing and segment info.

POKEB

ERRORS

BAD SYNTAX If B, segment, or address is missing.

BAD DATA If segment is > 7, or address > 65535

EXAMPLE

The following example reads digital I/O port A and saves it to RAM. The values are then retrieved and

printed back.

10 FOR N=0 TO 500

20 POKE B1,N*2,LINEB(3,0)

30 NEXT

40 FOR N=0 TO 500

50 A=PEEKB(1,N*2)

60 PRINT A,

70 NEXT

1 2 ... 92 93 94 95 96 97 98 99 100 101 102 ... 162 163

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Remote-processing BASIC 52 Manual de usuario Pagina 97