Remote-processing RPC-220 Manual do Utilizador descarregar pdf (Página 16)

WRITING, DEBUGGING, AND SAVING PROGRAMS SECTION 3

Page 3-5

MX M odify external memory

External mem ory is RA M on the RPC card. It is

accessed using a segment:memory type scheme.

Comm and format is:

MX [address[,segment]] <ret>

MI Modify internal memory

Internal memory is the RAM internal to the CPU . It

is fixed at 256 bytes. C ommand forma t is:

MI [address]

If an address is not entered, 0 is assumed.

MP Modify I/O ports

I/O devices such as real time cloc k, digital por ts,

D-A converters, counters, etc. are m odified using

this command. F ormat is:

MP [address]

If an address is not entered, 0 is assumed for both

parameters.

MS M odify Special Function R egisters

The 80C552 has several special function registers.

They are accessed in the range of 80H to FFH.

Refer to the Phillips data sheet (file

8XC552OV .P DF) for register specific information.

Comm and format is:

MS [address]

When [address] is not entered, 0 is assumed. The

monitor program does not check addresses.

Miscellaneous

F Fill External Memory

External memory is filled with a value. Command

format is:

F start_address,end_address,value[,segment]

' start_address' must be lower than ' end_address' .

Failure to do this will cause most of memory to be

written. Address values are not checked.

R Read Intel Hex file

Code and data files are downloaded using the Intel

MCS-86 object format, commonly known as Intel

Hex. This format supports both 16- and 32-bit

extended addresses. This monitor supports only the

16 bit address. A record type 04, extended linear

address recor d, does not produce an er ror but is

ignored. Any RAM memory from 0 to FFFF H may

be loaded to. The com mand for mat is:

R [offset]

' offset' is any value from 0 to F FF FH . ' offset' is

added to the address in the hex file. Data is stor ed to

offset + address. Use offset when you want to load

code starting at another address. Keep in mind that

any address loaded between 0 and 0x7FFF is kept in

external RAM and is not acce ssible as code. Data

loaded between 0x8000 and 0xFFFF is accessible as

either code or data.

If a checksum error is received during a download,

the last address stored is printed on the screen along

with a prompt to press the < esc> key to stop

printing the message.

Downloading code is done using any number of

modem communication programs. This includes PC

SmartLink, Procomm, and Windows Terminal. No

matter which comm unication program you use, first

type the letter "R" followed by the offset, if any. No

value entered assumes a 0. The monitor is now

waiting for a ":" to begin processing a line. After a

line is sent, the monitor returns a "> " character as

a pacing prompt. If there is an error in the

checksum , the progr am will continuously send out a

message until the < esc> key is pressed.

Instructions for three communication programs are

given below.

Procomm

Make sure Procomm' s ASCII download is set up

using a "> " as a pacing character. Delays between

characters and lines are not necessary. Select

Upload and then ASCII as the type. Enter the file

name then < Enter> . Y ou will see the H ex file as it

is sent.

Windows Terminal

Under the "Settings" menu selection, make sure

"Text Transfers" are set to "L ine at a time" and

under "Transfer a line at a time" is set to "Wait for

Prompt String". The prompt string is the "> "

character. To download the file, select "Tr ansfers"

then "Send text file". Select the file you wish to

transfer. The "Strip LF " option can be checked off

to see what is transferred.

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