Remote-processing RPC-2300 Instrukcja Użytkownika Pobierz pdf (Strona 10)

SAVING PROGRAMS CHAPTER 3

Page 8 RPC-2300

Figure 3-1 Autorun jumper

INTRODUCTION

Programs are stored in socket U3. An optional real time

clock module, a DS-1216EM may also be installed in

U3. See Chapter 7 for calendar/clock installation and

operation.

You can store one program up to a maximum size of

about 28K bytes. A general rule to determine program

storage requirements is one line requires 40 bytes. 28K

bytes would store over 700 lines of code. Your

application could be significantly more or less,

depending upon the number of commands / line,

comments, and print statements. Another indication of

program size is to use the file length as saved on a PC

disk.

Despite the fact you may have 128K or 512K RAM

installed, the maximum program size CAMBASIC II can

run is about 28K (leaving room for variable storage).

Only one program can be stored on the EPROM.

Program s cannot be chained.

A flash EPROM is non-volatile (retaining data even

when power is disconnected), having an unlimited

number of read cycles and a limited number of write

cycles (about 1,000). A program is not run from

EPROM . It is transferred to RAM and run from there.

Programs in RAM are run and can be modified. They

can be saved to EPROM for auto execution later.

The SBS-2300 can be set to autorun on power up or reset

by installing a jumper (W1[9-10]). When autorun is on,

the program in EP ROM is loaded into RAM and begins

to execute immediately.

The EP ROM is write-protected w ith a software lock, so

accidental writes on pow er-on or -off are almost

impossible. You cannot disable the lock except when

executing the SAVE command. T o save param eters,

you must use battery backed RAM.

SAVING A PROGRAM

To save a program, set jumper W1[9-10]. You may set

the jumper even if the power is on. R emem ber to

discharge any static electricity before installing or

removing the jumper. For this example, assume you

wanted to save the following program:

10 FOR N = 0 TO 2

20 PRINT "Hello ";

30 NEXT

40 PRINT

If this progr am is not alr eady in, type it in now (or, if

you prefer, use your own program).

Type in the following command:

SAVE

CAM BASIC II will compile the program, program the

EPROM, and verify its contents.

Compile...Write...Verify

The time it takes to do all of this depends upon the

length and complexity of the progr am. Gener ally, it w ill

be from 1 to 20 seconds. The ready prom pt (> ) will

appear when the program has been successfully saved to

the EPROM . If the program does not write to the

EPROM, an error message will appear:

Fail @ xxxx

Saving a program overw rites the pr evious one. Ther e is

no way to recover it since both occupy the same space.

AUTORUNNING

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 35 36

Komentarze do niniejszej Instrukcji

Brak uwag

Remote-processing RPC-2300 Instrukcja Użytkownika Strona 10

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Komputery Remote-processing RPC-2300