Autosite_Users_Manual - 第118页

Trans lati on Form ats B-20 AutoSite User Manual Although each data byte has a n address, most are implied. Data bytes a re addressed sequen tially unless an explicit address is i ncluded in the data stream. This a ddres…

Translation Formats

AutoSite User Manual B-19

ASCII Octal and Hex Formats, Codes 30-37 and 50-58

Each of these formats has a start and end code, and similar address and

checksum specifications. Figure B-6 illustrates 4 data bytes coded in each

of the 9 ASCII Octal and Hexadecimal formats. Data in these formats are

organized into sequential bytes separated by the execute character (space,

percent, apostrophe, or comma). Characters immediately preceding the

execute character are interpreted as data. ASCII Octal and Hex formats

can express 8-bit data, by 3 octal or 2 hexadecimal characters. Line feeds,

carriage returns, and other characters may be included in the data stream

as long as a data byte directly precedes each execute character.

Figure B-6

An Example of ASCII Octal and Hex Formats

$A000000,

377 377 377 377 377 377 377 377 377 377 377 377 377 377 377 377

$S007760,

$A000000,

377%377%377%377%377%377%377%377%377%377%377%377%377%377%377%377%

$S007760,

$A000000,

377'377'377'377'377'377'377'377'377'377'377'377'377'377'377'377'

$S007760,

$A000000,

377'377'377'377'377'377'377'377'377'377'377'377'377'377'377'377'

$S007760,

$A0000,

FF%FF%FF%FF%FF%FF%FF%FF%FF%FF%FF%FF%FF%FF%FF%FF%

$S0FF0,

$A0000,

FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

$S0FF0,

$A0000,

FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'

$S0FF0,

$A0000,

FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,

$S0FF0,

$A0000,

FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'

$S0FF0,

FORMAT 30 (OR 35)

FORMAT 31 (OR 36)

FORMAT 32

FORMAT 37

FORMAT 50 (OR 55)

FORMAT 51 (OR 56)

FORMAT 52

FORMAT 53 (OR 58)

FORMAT 57

Optional Octal Address Field (Typical)

Optional Octal Sumcheck Field (Typical)

Octal Data Byte (Typical)

Execute Character

Optional Hex Address Field

Optional Hex Sumcheck Field

LEGEND

Start Code is nonprintable STX - CTRL B (optionally SOH - CTRL A)

Start Code is nonprintable SOM - CTRL R

End Code is nonprintable EOM - CTRL T

End Code is nonprintable ETX - CTRL C

0078-2

Translation Formats

B-20 AutoSite User Manual

Although each data byte has an address, most are implied. Data bytes are

addressed sequentially unless an explicit address is included in the data

stream. This address is preceded by a $ and an A, must contain 2 to 8 hex

or 3 to 11 octal characters, and must be followed by a comma, except for

the ASCII-Hex (Comma) format, which uses a period. The programmer

skips to the new address to store the next data byte; succeeding bytes are

again stored sequentially.

Each format has an end code, which terminates input operations.

However, if a new start code follows within 16 characters of an end code,

input will continue uninterrupted. If no characters come within 2

seconds, input operation is terminated.

After receiving the final end code following an input operation, the

programmer calculates a sumcheck of all incoming data. Optionally, a

sumcheck can also be entered in the input data stream. The programmer

compares this sumcheck with its own calculated sumcheck. If they

match, the programmer will display the sumcheck; if not, a sumcheck

error will be displayed.

Note: The sumcheck field consists of either 2-4 hex or 3-6 octal characters,

sandwiched between the $ and comma characters. The sumcheck

immediately follows an end code. The sumcheck is optional in the input

mode but is always included in the output mode. The most significant

digit of the sumcheck may be 0 or 1 when expressing 16 bits as 6 octal

characters.

the programmer divides the output data into 8-line blocks. Data

transmission is begun with the start code, a nonprintable STX character,

or optionally, SOH.* Data blocks follow, each one prefaced by an address

for the first data byte in the block. The end of transmission is signaled by

the end code, a nonprintable ETX character. Directly following the end

code is a sumcheck of the transferred data.

* ASCII-Octal SMS and ASCII-Hex SMS use SOM (CTRL-R) as a start code and EOM

(CTRL-T) as an end code.

Translation Formats

AutoSite User Manual B-21

RCA Cosmac Format, Code 70

Data in this format begin with a start record consisting of the start

character (!M or ?M), an address field, and a space. See Figure B-7.

The start character ?M is sent to the programmer by a development

system, followed by the starting address and a data stream which

conforms to the data input format described in the ASCII-Hex and Octal

figure. Transmission stops when the specified number of bytes has been

transmitted.

Address specification is required for only the first data byte in the

transfer. An address must have 1 to 4 hex characters and must be

followed by a space. The programmer records the next hexadecimal

character after the space as the start of the first data byte. (A carriage

return must follow the space if the start code ?M is used.) Succeeding

bytes are recorded sequentially.

Each data record is followed by a comma if the next record is not

preceded by an address, or by a semicolon if it starts with an address.

Records consist of data bytes expressed as 2 hexadecimal characters and

followed by either a comma or semicolon, and a carriage return. The

programmer ignores any characters received between a comma or

semicolon and a carriage return.

The carriage return character is significant to this format because it can

signal either the continuation or the end of data flow; if the carriage

return is preceded by a comma or semicolon, more data must follow; the

absence of a comma or semicolon before the carriage return indicates the

end of transmission.

Output data records are followed by either a comma or a semicolon and a

carriage return. The start-of-file records are expressed exactly as for

input.

Figure B-7

An Example of RCA Cosmac

Format

!M0000 ,

FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF,

FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

Start Record

!M or ?M = Start Characters

0000 = Address

End-of-File Record

Data Records

FF =

, =

; =

2 Hex Characters = (1 Byte)

Bytes per record is variable

End of Record Character

if followed by expressed

address

LEGEND

Nonprinting line feed, carriage return, and nulls

Nonprinting carriage return

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