Remote Processing BASIC 52 - Manual (Page 98)

RPBASIC-52 PROGRAMMING GUIDE
2-79
PEEKF
Syntax: PEEKF(segment,ad dress)
Where: segment = 0 to 7, specifies a 64K segment
address = 0 to 65535, byte address in a segment
Function: Reads a floa ting point num ber from R AM. Flo ating point range is + /- 1E-127 to +/-
0.99999999E+127
Mode: Comm and, Run
Use: A = P E E K F (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 F . 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 F
retrieves a floating point number saved by POKE F.
PEEKF 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.
Each floatin g poin t num ber req uires 6 bytes. address must be inc reme nted in dexe d 6 byte s for eac h valu e.
See POKEB and POKEF com mands for addressing and segment info.
RELATED
POKEF
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 follow ing exam ple reads the A -D port, multiplies it by a constant, and sa ves it to RA M. The v alues are
then retrieved and printed back.
10 FOR N=0 TO 500
20 A = AIN(1) * 0.2344
20 POKE F1,N*6,A
30 NEXT
40 FOR N=0 TO 500
50 A=PEEK F(1,N*6)
60 PRINT A,
70 NEXT