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- Date: 12-MAY-1987 16:17:10
- From: SYSKERMIT%vax1.central.lancaster.ac.uk@Cs.Ucl.AC.UK
- Subject: File NOSKERM.BWR
-
- The original version of MS-Kermit with windowing supplied by
- 'The Source' (who developed the windowing extension) did not
- handle Xon/Xoff flow control correctly. This version of Kermit
- was also used in the terminal emulator 'PROCOMM' at level 2.2.
- NOS Kermit uses software flow control but on a directly connected
- terminal no transfer problems were found. However when connecting
- through our local area network, as this does not have the required
- bandwidth, the flow control error in MS-Kermit prevented any
- transfer unless the window size was reduced to '2'. I understand
- that the MS-Kermit with windows as been corrected, and so has
- 'PROCOMM' which is now at level 4.0, but as yet I have neither
- available - any offers?
- Paul Jarvis 29/10/1986
-
- When a large file is received and is made permanent as a direct
- access file then the time taken to 'DEFINE' this file and copy
- it to a valid user device may be long enough for the local micro
- Kermit to time out and thus abort any further transfers. Until
- such time as a fix is available (I'm trying) the only way round
- this problem is to increase the local timeout value.
- Another permanent file related problem occurs when an existing
- indirect access file is to be 'REPLACED' by a file which, because
- of its length, must be direct access. When this happens currently
- the file is left local and a warning message issued in the log file.
-
- Paul Jarvis 4/11/1986
-
- **** Version 1.30 - 19 January 1987.
-
- This version contains a complete re-write of the interactive
- command parser, the addition of a useful help facility,
- addition of TAKE and STATUS commands, addition of BINARY file
- format (as defined by UMRCC) and a correction to processing
- duplicate data packets. The default packet length is also
- increased to 94. The compilation symbol PSR has been added in
- an attempt to enable windowing at versions of NOS below 2.3
-
- The new version is sent as a complete new source file and not
- as a series of modification directives as was originally proposed.
- This is because the modifications amounted to 3000 lines which
- is about 20% of the total.
-
- The CDC display code character set cannot represent the full
- ASCII range. If a file is transferred in either direction using
- the display code character set (DIS64) then the transfer will be
- aborted if an attempt is made to transfer a character which has
- no corresponding display code. The offending character is written
- to the log file in octal. It has been noticed that when using
- Procomm 2.4 (which supports sliding windows) that if an illegal
- character is discovered after Procomm has sent the End-of-File
- packet then Procomm ignores the Error packet it receives and
- assumes the transfer to be correct. I think this is a bug in
- Procomm.
-
- Any comments would be appreciated, and it's easier now I'm
- on Email (see below).
-
- Paul Jarvis 19/01/1987
- (CMAAH24@UK.AC.IC.CC.VAXA)
-
-
- ----------------
-
- Date: 19-MAR-1987 16:25:42
- From: CMAAH24@UK.AC.IMPERIAL.CC.VAXA
-
- There are two corrections for NOS Kermit following. The first corrects
- sending the CAPAS byte if it is zero, i.e. no extensions. It appears that at
- least one version of Kermit objects to receiving a CAPAS byte whatever its
- value. The second error is far more serious and concerns wild card processing.
- The character '*' in a file name should be interpreted as zero or more
- characters, unfortunately I currently interpret it as 'mess up the filename
- completely'. The following modifications should be applied to the original
- source using the utility 'MODIFY'.
-
- There is still a slight problem with wild character processing. The
- characters '?' and '#' should both represent any single character. If two or
- more are used at the end of a file name the processing is wrong.
-
- For example:-
- GET FR?? should match any file name having four
- characters beginning FR. However NOS Kermit
- will incorrectly match two and three character
- file names as well. To be investigated...
-
- Paul
-
- P.S.
- These modifications update the revision level to 1.31
-
-
- *IDENT APJ0001
- */ *** P. JARVIS 20/02/1987
- */ **** CORRECT INITIAL 'S' PACKET TRANSMISSION TO OMIT
- */ **** SENDING 'CAPAS' BYTE IF WINDOWING DISABLED.
- *DECK KERMIT
- *D 4115
- NG X3,BCP14 CAPAS BYTE NOT REQUIRED
- *D 4211
- CON -1 DEFAULT CAPAS
- */ END OF MODSET (APJ0001)
- *IDENT APJ0002
- */ *** P. JARVIS 19/03/1987
- */ **** CORRECT WILD CODE TRANSFERS.
- *DECK KERMIT
- *D 133
- VERSION MICRO 1,,*1.31*
- *D 5485
- BFN10 SB3 B4+B4
- *D 5494,5495
- LX6 B3 POSITION NAME
- SB4 B0 CLEAR REMAINING CHARACTER COUNT
- BX7 X2+X7 ADD TO FILE NAME MASK
- */ END OF MODSET (APJ0002)
-