Remote-processing BASIC 52 Manual do Utilizador descarregar pdf (Página 99)

RPBASIC-52 PROGRAMMING GUIDE

2-80

PEEKW

Syntax: PEEKW(segment,address)

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

address = 0 to 65535, w ord address in a segment.

Function: Reads an unsigned 16 bit number from RAM

Mode: Command, Run

Use: A = PEEKW(0,AD)

Cards: All

DESCRIPTION

Use this function in conjunction w ith POKEW. Data is retrieved from any mem ory location as a single 16 bit

(2 byte) number. Numbers in the range of 0 to 65535 are retrieved. Two bytes of data are required for data

retrieval.

PEEKW can access up to 512K of ram by selecting a segment and an address. A segment selects a 64K block

while the address selects a location within this block.

See POKEB for addressing and segment information.

POKEW

ERRORS

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

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

EXAMPLE

This exam ple takes 500 readings from analog input 0, saves it to segment 1 of a 128K R AM, and then prints

out all of the values

10 FOR N=0 TO 500

20 POKE W1,N*2,AIN(0)

30 NEXT

40 FOR N=0 TO 500

50 A=PEEKW(1,N*2)

60 PRINT A,

70 NEXT

1 2 ... 94 95 96 97 98 99 100 101 102 103 104 ... 162 163

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Remote-processing BASIC 52 Manual do Utilizador Página 99