Remote Processing CAMBASIC - Manual (Page 73)

Comm ands - 40
DPEEK and DPOKE
Memory Function and Statement
SYNTAX: n = DPEE K(address)
n = DPEE K (address, segment )
DPOKE address, data
DPOKE address, data, segm ent
PURPOSE: DPE EK returns a 16– bit value from memor y.
DPO KE writes a 16– bit value to memory.
REMARK S: A 16– bit word is form ed with the lower 8 bits as the value located at mem ory addr ess “ address”
and the upper 8 bits as the value located at memory location “ address + 1” .
The first syntax applies to the first 64K of memor y (segment 0). For addresses above segment 0, use
the second syntax. Not all cards support segmented mem ory.
DPEE K is an extension of PEEK and executes twice as fast as two PEEK functions. DP OKE is an
extension of POK E and executes tw ice as fast as two pokes.
RELATED: DPOKE, PEEK, FPEEK, PEEK$, POKE, FPOKE, POKE$
EXAMPLE: The following routine POKEs or writes two numbers into memory. The DPEEK statement allows
both to be retrieved and printed ( 256 x 3 + 45 = 813). You could also say DP OKE 2000, 813.
10 POKE &A000,45 : POKE &A001,3
20 PRINT DPEEK(&A000)
RUN
813
10 A=DPEEK(1000,2)
T h is r et r ie v es d at a f r om address 1000 at segment 2.
ERROR: < Data negative> – for address and segment
< Data > 65,535> – for address
< Data out of range> – if segment > 15