Xerox FreeFlow manual Table D-3. Content of tape records, Table D-4. RAD-50 character set

Models: FreeFlow

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Offline specifications

 

 

Table D-3. Content of tape records

 

 

 

 

 

Byte range

Information contained in record

Additional information

 

 

 

 

 

 

 

 

 

00–02

File name

If not used, must be zero.

 

 

 

 

 

04

File type (RAD–50)

 

 

 

 

 

 

06

File size in 512–byte blocks

 

 

 

 

 

 

10

First free byte

 

 

 

 

 

 

12

Date (DOS format)

Not used

 

 

 

 

 

14

Record size in bytes

80 for text; otherwise, 512

 

 

 

 

 

16

Tape block size in bytes

 

 

 

 

 

 

20

Reserved for future use

 

 

 

 

 

 

22–32

ASCII file name (9 characters).

Currently only 6–character file

 

 

 

names are supported.

 

 

 

Unused file name characters

 

 

 

must be filled with 0.

 

 

 

 

 

33-35

ASCII file type

 

 

 

 

 

 

42–176

Contain 0

 

 

 

 

 

 

177

ASCII * (052)

 

 

 

 

 

 

200–777

Contain 0

 

 

 

 

 

NOTE: Characters in the ASCII file name and type fields must be in the RAD–50 (Radix-50) character set. The following table defines the RAD-50 character set.

Table D-4. RAD–50 character set

RAD–50

ASCII

RAD–50

RAD–50

character

Octal value

Octal value

decimal value

 

 

 

 

 

 

 

 

(space)

040

000

000

 

 

 

 

A–Z

101–132

001–032

1–26

 

 

 

 

$

044

033

27

 

 

 

 

.

056

034

28

 

 

 

 

(undefined)

 

035

29

 

 

 

 

0–9

060–071

036–047

30–39

 

 

 

 

Using LCDS Print Description Language

D-7

Page 477
Image 477
Xerox FreeFlow manual Table D-3. Content of tape records, Table D-4. RAD-50 character set