Remote-processing BASIC 52 Uživatelský manuál stáhnout pdf (Strana 100)

RPBASIC-52 PROGRAMMING GUIDE

2-81

PEEK$

Syntax: $(n) = PEEK$(segment,address)

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

address = 0 to 65535, starting string address in a segment

Function: Retrieves a string from RAM.

Mode: Command, Run

Use: $(0) = PEEK$(1,210)

Cards: All

DESCRIPTION

Use th is com man d to retrieve str ings sto red in R AM mem ory using the P OK E$ comm and. segment specifies

the 64K segment to save to. 0 is the base segment where RPBA SIC-52 runs its programs. Setting MTOP to a

number less than the top of memory will provide a 'protected' area from the Basic program.

Refer to the POKEB statement for addressing and segment information.

NOTE: This command works only when it is assigning another string variable. A BAD

SYNTAX error is returned when it is part of a PRINT, IF-THEN, ASC, or other command

or function. Use this function only as shown in SYNTAX above.

POKE$

ERRORS

BAD SYNTAX If $, segment, or address is missing. Also when this function is part of

another function or command.

BAD DATA If segment is > 7

EXAMPLE

The following example assumes MTOP = 30000. It will assign and recover a string from

RAM.

10 AD = 30000

20 STRING 100,20

30 $(0) = "Test string"

40 POKE$ 0,AD,$(0)

50 $(1) = PEEK$(0,AD)

60 PRINT $(1)

1 2 ... 95 96 97 98 99 100 101 102 103 104 105 ... 162 163

Žádné komentáře

Remote-processing BASIC 52 Uživatelský manuál Strana 100