Remote-processing RPC-2350 Bedienungsanleitung PDF herunterladen (Seite 28)

DATA MEMORY CHAPTER 5

5-2

Figure 5-2 2350 system memory map

Figure 5-3 Flash memory map

Program s and CAMBASIC variables reside in segment

0, between address 00000H and 0FFFFH . Your

variables (as defined a bove) ar e stored fr om 10000H to

1FFF FH (with 128K RAM), which is called segment 1,

address 0000H to FF FFH. When 512K RAM is

installed, the useful range is from 10000H to 7FFFFH.

A segment has an address range from 0000 to FFFFH

(or &0000 to &F FFF using C AM BASIC notation) (in

decimal terms, this is 0 to 65535).

NOTE: Do not use the CAM BASIC SOU ND statement

when the board has 512K of RAM or Flash

memory. Sound output is multiplexed with an

address line.

Program and basic variables (A, B(15), C $, etc. ) always

reside in segment 0 and are cleared on reset. A special

set of variables, A% - Z%, reside is segment 0 and are

not cleared on reset. These are floating point numbers

and can be used like any other variable in Basic.

Variables you peek and poke to should reside in segment

1 with 128K RAM installed or segments 1-7 with 512K.

PEEK and POKE commands store and retrieve values

from memory. For example:

20 POKE 12,A,1

puts the value of A into segment 1, address 12. U se the

PEEK statement to retrieve the variable:

50 B = PEEK(12,1)

You can store and retrieve arrays, strings, and variables

in this way. There ar e many variations of PEE K and

POKE statements. Refer to the CAMBA SIC

Programming Manual for additional information and

examples. A list of comm ands appea rs at the end of this

chapter.

Flash Memory

Programs are stored in Flash EPROM. Programs are

transferred from Flash to RAM at run time or LOAD.

Data may also be stored in Flash. Below shows the

Flash memor y map.

A 128K or 512K Flash type EP ROM may be installed in

U3. Jumper W2 configures U3 for Flash size.

Data may be stored above the program in Flash using the

SAVE comm and. The SAVE comma nd transfers data

from RAM to Flash. Fonts for the RPC-2350G are

stored in Flash above program 1 starting at F lash address

&1AC00 (this is segment 9, address &AC 00 when using

SAVE). This will not interfere with your program but

will affect any data storage plans you may have.

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