Remote Processing BASIC 52 - Manual (Page 97)

RPBASIC-52 PROGRAMMING GUIDE
2-78
PEEKB
Syntax: P E E K B (segment,ad dress)
Where: segment = 0 to 7, specifies a 64K segment
address = 0 to 65535, byte address in a segment
Function: R e a d s a b y te f ro m R A M
Mode: Comm and, Run
Use: A = P E E K B (1 , A D )
Cards: All
D E S C R IP T I ON
T h i s f u nc t io n is u se d in c o nj u nc t io n w it h P OK E B . D at a is r et r ie v e d f r om a n y m em o r y l o ca t io n . P E E K B
inputs 1 byte of data. This function operates in much the sam e way as XB Y does except PE EKB c an access
5 1 2K o f R A M .
See POKEB command for addressing and segment info.
RELATED
POKEB
ERRORS
B A D S Y N T A X 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