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Trans lati on Form ats B-22 AutoSite User Manual Fairchild Fairbu g, Code 80 In the Fairbug f ormat, input and ou tput requirements are identica l; both have 8-byte records and identical control char acters. Figure B-8 s…

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

0079-2

Translation Formats

B-22 AutoSite User Manual

Fairchild Fairbug, Code 80

In the Fairbug format, input and output requirements are identical; both

have 8-byte records and identical control characters. Figure B-8 shows a

Fairbug data file. A file begins with a 5-character prefix and ends with a

1-character suffix. The start-of-file character is an S, followed by the

address of the first data byte. Each data byte is represented by 2

hexadecimal characters. The programmer will ignore all characters

received prior to the first S.

Note: Address specification is optional in this format; a record with no address

directly follows the previous record.

Each data record begins with an X and always contains 8 data bytes. A

1-digit hexadecimal checksum follows the data in each data record. The

checksum represents, in hexadecimal notation, the sum of the binary

equivalents of the 16 digits in the record; the half carry from the fourth bit

is ignored.

The programmer ignores any character (except for address characters and

the asterisk character, which terminates the data transfer) between a

checksum and the start character of the next data record. This space can

be used for comments.

The last record consists of an asterisk only, which indicates the end

of file.

Figure B-8

An Example of Fairchild Fairbug

S0000

XFFFFFFFFFFFFFFFFC

Start Record

S = Start Character

0000 = Address Field

End-of-File Record

Data Records

X =

FF =

C =

Data Record Start Character

2 Hex Characters (1 Byte)

Checksum. 1-digit summation

of data in record

0080-2

Translation Formats

AutoSite User Manual B-23

MOS Technology Format, Code 81

The data in each record are sandwiched between a 7-character prefix and

a 4-character suffix. The number of data bytes in each record must be

indicated by the byte count in the prefix. The input file can be divided

into records of various lengths.

Figure B-9 shows a series of valid data records. Each data record begins

with a semicolon. The programmer will ignore all characters received

prior to the first semicolon. All other characters in a valid record must be

valid hexadecimal digits (0-9 and A-F). A 2-digit byte count follows the

start character. The byte count, expressed in hexadecimal digits, must

equal the number of data bytes in the record. The byte count is greater

than zero in the data records, and equals zero (00) in the end-of-file

record. The next 4 digits make up the address of the first data byte in the

record. Data bytes follow, each represented by 2 hexadecimal digits. The

end-of-file record consists of the semicolon start character, followed by a

00 byte count, the record count, and a checksum.

The checksum, which follows each data record, is a 2-byte binary

summation of the preceding bytes in the record (including the address

and byte count), in hexadecimal notation.

Figure B-9

An Example of MOS Technology Format

;100000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF1000

;100010FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF1010

;100020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF1020

;100030FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF1030

;100040FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF1040

;0000050005

Sumcheck of record including

data, address and byte count

Data Records

End-of-File Record

Record Count Sumcheck

Start Character

Byte Count

Address Field

LEGEND

Nonprinting Carriage Return, line feed,

and nulls determined by null count

0081-2