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GUIDE TO USING THE "FE" DEVICE
FILE: USEFE.RND
AUTHOR: TOM PORCHER
DATE: 4-JAN-75
GUIDE TO USING THE "FE" DEVICE Page 2
OVERVIEW
THE "FE" DEVICE IS USED FROM THE -11 TO TRANSFER FILES TO AND FROM THE
TOPS-20 FILE SYSTEM. USUALLY IT IS ACCESSED THROUGH THE USE OF -11
PIP.
FILE CONVERSION
THE "FE" DEVICE CAN ONLY TRANSFER 16-BIT BINARY FILES SO THAT
CONVERSION FROM TOPS-20 FORMAT IS REQUIRED TO MAKE THE FILES USEABLE
BY THE -11. THE STANDARD FORMATS FOR FILES ON THE -11 ARE FORMATTED
ASCII (ALL TEXT FILES), FORMATTED BINARY (.OBJ, .STB, .SML, .BIN,
.OLB), AND IMAGE (UNFORMATTED BINARY). A PROGRAM CALLED "RSXFMT" WAS
DEVELOPED TO DO THE NECESSARY CONVERSIONS. RSXFMT PROMPTS BY TYPING
"FILE: ", TO WHICH THE USER SHOULD RESPOND WILL THE NAME OF THE FILE
TO BE CONVERTED. THE CONVERSION MODE FOR THE FILE IS DETERMINED FROM
THE FILE TYPE AND THE FIRST DATA WORD IN THE FILE. THE OUTPUT FILE IS
ALWAYS A FILE OF THE SAME NAME, NEXT HIGHEST GENERATION. IN THE CASE
OF FILES BEING CONVERTED TO RSX FORMAT, THE OUTPUT FILE IS A TEMPORARY
FILE SUCH THAT IT CAN BE DELETED EASILY USING "EXPUNGE", SINCE AN
RSX-FORMAT FILE IS RATHER USELESS TO ALL PROGRAMS ON TOPS-20. AN
EXAMPLE:
@R RSXFMT
FILE: T20ACP.*
T20ACP.MAC.4 [7-BIT ASCII]
==> T20ACP.MAC.100008;T [RSX FORMATTED ASCII]
T20ACP.OBJ.7 [DOS FORMATTED BINARY]
==> T20ACP.OBJ.100008;T [RSX FORMATTED BINARY]
@
ASCII IMAGE FILES
ANY FILE WHICH IS IN ASCII AND MUST RETAIN THE END-OF-LINE SEQUENCE ON
THE -11 CANNOT BE CONVERTED TO RSX FORMATTED ASCII. THESE FILES CAN
BE PROCESSED DIRECTLY BY THE "FE" DEVICE IF THEY ARE IN 7-BIT ASCII
FORMAT AND HAVE A BYTE-SIZE OF 7 BITS. NOTABLY THE "ASCII-IZED" FILES
(.A10 AND .RAM) FOR THE KL INITIALIZATION TASK (KLINIT) ARE REQUIRED
TO BE IN ASCII IMAGE FORMAT.
GETTING THE SYSTEM STARTED
THE PROGRAM "FE" MUST BE RUNNING ON THE TOPS-20 SYSTEM. IF IT IS NOT
ALREADY RUNNING, IT CAN BE STARTED BY TYPING THE FOLLOWING UNDER THE
OPERATOR ACCOUNT (PROBABLY UNDER PTYCON):
@ENABLE (CAPABILITES)
$R FE
THE "FE" PROGRAM SHOULD NOW BE RUNNING AND IS WAITING FOR A REQUEST
FROM THE "FE" DEVICE FROM THE -11. THE NEXT STEP IS TO MOUNT THE "FE"
DEVICE ON THE -11 SUCH THAT FILES CAN BE ACCESSED USING IT. THIS
GUIDE TO USING THE "FE" DEVICE Page 3
REQUIRES THAT THE FILE "T20ACP.TSK" BE PRESENT ON THE -11 FILE SYSTEM.
"FE" CAN BE MOUNTED USING THE CONSOLE COMMAND PARSER AT THE CONSOLE
TERMINAL BY TYPING:
^\ (CONTROL-BACKSLASH)
PAR>MCR MOU
MOU>FE:
MOU -- MOUNT COMPLETE
MOU>^Z (CONTROL-Z)
ADDRESSING TOPS-20 FILES
ALL FILES ON THE TOPS-20 FILE SYSTEM MAY BE ACCESSED FROM THE -11 WITH
THE FOLLOWING EXCEPTIONS:
FILES WITH FILE NAMES LONGER THAN 9 CHARACTERS.
FILES WITH FILE TYPES LONGER THAN 3 CHARACTERS.
FILES WITH FILE NAMES CONTAINING CHARACTERS OTHER THAN A-Z,
0-9.
FILES WITH GENERATION NUMBERS NOT IN THE RANGE 1.-8191. OR
100000.-108191..
FILES IN DIRECTORY NUMBER 20000 OR GREATER.
DIRECTORIES ARE MAPPED TO UIC'S ON THE -11 IN TWO WAYS: FIXED
DIRECTORIES AND BY DIRECTORY NUMBER. THE FIXED DIRECTORIES ARE:
[1,1] <SYSTEM>
[1,2] <OPERATOR>
[1,4] <SUBSYS>
[5,5] <FRONT-END>
ALL UIC'S GREATER THAN [340,0] MAP DIRECTLY TO DIRECTORY NUMBERS. THE
FORMULA TO FIND THE UIC FOR A GIVEN DIRECTORY NUMBER "D" IS [ 340 + (D
/ 400) , REMDR(D,400) ] WHERE / REPRESENTS INTEGER DIVISION,
REMDR(X,Y) IS THE REMAINDER OF DIVIDING X BY Y. SOME EXAMPLES:
DIRECTORY NUMBER 502:
502 / 400 = 1
REMDR(502,400) = 102
==> DIRECTORY 502 MAPS TO UIC [341,102]
DIRECTORY NUMBER 2745:
2745 / 400 = 5
REMDR(2745,400) = 345
==> DIRECTORY 2745 MAPS TO UIC [345,345]
FILES ARE MERELY REFERENCED BY FILE NAME, FILE TYPE AND GENERATION.
NOTE THAT GENERATION NUMBERS ON THE -11 ARE IN OCTAL, AND ARE
PUNCTUATED BY A ";" RATHER THAN A ".". GENERATIONS GREATER THAN
100000. (USUALLY JOB TEMPORARY FILES) ARE MAPPED TO GENERATIONS 20000
AND UP ON THE -11 TO FACILITATE THE USE OF THESE FILES.
GUIDE TO USING THE "FE" DEVICE Page 4
USING -11 PIP
-11 PIP IS USED IN ALMOST ALL TRANSFERS THROUGH THE "FE" DEVICE. PIP
CAN BE REQUESTED THROUGH THE CONSOLE COMMAND LANGUAGE USING THE "MCR
PIP" COMMAND. THE FOLLOWING BASIC COMMANDS CAN BE USED TO LIST AND
TRANSFER FILES:
TO LIST A TOPS-20 DIRECTORY ON DEVICE DEV:
PIP>DEV:=FE:[UIC]FILE.TYP;NNN/LI (OR /BR OR /FU)
EXAMPLE:
PIP>FE:[5,5]/BR
DIRECTORY FE0:[5,5]
4-JAN-75 00:35
T20ACP.LST;1
T20ACP.MAC;3
T20ACP.MAC;4
T20ACP.MAC;20010
T20ACP.OBJ;6
T20ACP.OBJ;7
T20ACP.OBJ;20010
PIP>
TO COPY A FILE TO THE -11 FILE SYSTEM:
PIP>DEV:=FE:[UIC]FILE.TYP;NNN/NV
EXAMPLE:
PIP>DX1:=FE:[341,102]T20ACP.*/NV
PIP>
TO COPY A FILE FROM THE -11 FILE SYSTEM:
PIP>FE:[UIC]=DEV:FILE.TYP;NNN/NV
EXAMPLE:
PIP>FE:[341,102]*.NEW=*.BIN/NV
PIP>
DEV: IS AN -11 DEVICE WHICH IS MOUNTED. IF ABSENT, SY: (THE SYSTEM
DEVICE) IS ASSUMED FOR FILES, TT: (THE CONSOLE TERMINAL) FOR
DIRECTORY LISTINGS. /NV (NEW VERSION) IS RECOMMENDED IN TRANSFERRING
FILES, SINCE USUALLY THE GENERATION NUMBERS ON FILES-11 AND TOPS-20
HAVE NO RELATION. TO EXIT FROM PIP, TYPE ^Z (CONTROL-Z).
TERMINATION OF "FE" DEVICE
WHEN ALL THE DESIRED FILES HAVE BEEN TRANSFERRED, THE "FE" DEVICE
SHOULD BE DISMOUNTED TO FREE UP SYSTEM RESOURCES IN USE. DISMOUNTING
THE "FE" DEVICE IS THE DONE BY TYPING AT THE CONSOLE TERMINAL:
^\ (CONTROL-BACKSLASH)
PAR>MCR DMO
DMO>FE:
GUIDE TO USING THE "FE" DEVICE Page 5
DMO -- DISMOUNT COMPLETE
DMO>^Z (CONTROL-Z)
TEMPORARY RSX FORMAT FILES WHICH WERE GENERATED BY USING RSXFMT MAY BE
DELETED USING THE EXPUNGE COMMAND AS FOLLOWS:
@EXPUNGE (DIRECTORY) ,
@@DELETE (TEMPORARY FILES)
@@
@
NOTE THAT THIS DELETES ALL TEMPORARY FILES AND DELETED FILES SO IT
SHOULD BE USED WITH CAUTION. THIS IS DONE AUTOMATICALLY WHEN YOU
LOGOUT.
[END OF USEFE.RND]