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-2,3 .MODULE KMOVLY,VERSION=6302,COMMENT=<KMON Overlays>

-21 .SBTTL Post-Release Edit History

;+ ; ; SLP patches Copyright (c) 2000 Megan Gentry, All Rights Reserved ; ; This file contains source code modifications which were distributed ; through use of a Source Language Patch (SLP) file. These modifications ; are unofficial changes. They were not developed, reviewed or tested ; by, and have not been approved by Digital Equipment Corporation, Compaq ; Computer Corporation, or Mentec, Ltd, and they are not supported by ; these organizations. ; ; These modifications may only be used with the inclusion of both the ; above copyright notice and the full text of these comments. ; ; The author has used best efforts in the preparation of these ; modifications. These efforts include research, development and ; testing. The author makes no warranty of any kind, expressed or ; implied, with regard to these changes. The author shall not be liable ; in any event for incidental or consequential damages in connection ; with, or arising out of, the use or performance of these changes. Use ; of these modifications constitutes acceptance of these terms. ; ; The author is interested in any comments or reports of problems and ; will make a best effort at determining if a problem is a result of ; these modifications or if it exists in the distributed code. Please ; report any problems to <mbg@world.std.com> ; ; (01) 10-Jan-2000 Megan Gentry ; o DATE command: The code rejected date words with the high order ; (epoch) bits set. This restriction has been removed. ; o DATE command: The code rejected date words with the year offset ; field bits zero. This caused 1972 to be rejected as invalid. ; This has been corrected. ; ; (02) 11-Jan-2000 Megan Gentry ; o DATE command: Y2K and extended date support has been included. ; Dates in year range 72-99 are accepted as meaning 1972-1999 ; Dates in year range 00-71 are accepted as meaning 2000-2071 ; Dates in year range 1972-2099 are accepted as is. Note that ; although the date may be accepted in a two-digit form, it will ; always be reported in a four-digit form. ; ;-

-333,334 OJSR PC,DECNUM ;Get the specified year TST @SP ;Is it positive? BMI 10$ ;No, so it can't be valid... SUB #1972.,@SP ;Is it a valid four-digit year? BGE 42$ ;Maybe, check the upper limit ADD #<1972.-99.>,@SP ;No, can it be a valid two-digit year? BGT 10$ ;Nope, too high... ADD #<99.-72.>,@SP ;Yes, but in which range? BGE 42$ ; ... in range 72..99 ADD #<2000.-1900.>,@SP ; ... in range 00..71, add 100. 42$: CMP @SP,#<2099.-1972.> ;So, is the year in range 0 - 127.? BGT 10$ ;Nope, patently invalid... MOV @SP,-(SP) ;Copy the year info BIC #^C<37>,2(SP) ;Isolate the year field BIC #<37>,@SP ;Isolate the epoch info ASL @SP ;Shift epoch to its place SWAB @SP ; in an RT-11 extended date word BIS (SP)+,@SP ;Merge epoch with year BIS (SP)+,R1 ; and merge both with date word -346,362 BEQ 9$ ;If date is not set at all... MOV R2,R0 ;Copy the date BIC #^C<31.*40>,R0 ;Isolate the day field BEQ 9$ ;A zero day is invalid... ASL R0 ;And shift it ASL R0 ; from <09:05> ASL R0 ; to <04:00> SWAB R0 ; ... CALL R10ONF ;Print it out MOV R2,-(SP) ;Copy the date (for year output) MOV R2,-(SP) ;Copy the date (for month output) BIC #^C<15.*2000>,@SP ;Isolate the month field SUB #<1*2000>,@SP ;Reduce range from 1-12 to 0-11 SWAB @SP ;Shift from <13:10> to <05:02> ; (used for index into month string) -368,371 MOV @SP,R2 ;R2 = Date word BIC #^C<37>,R2 ;Isolate the year offset BIC #^C<3*40000>,@SP ;Isolate the epoch SWAB @SP ;Shift it ASR @SP ; ... BIS (SP)+,R2 ;Merge with year offset ADD #72.,R2 ;Add in base RT year MOV #19.,R0 ;Assume 19xx CMP R2,#100. ;Correct assumption? BLO 85$ ;Yep... INC R0 ;Nope, 20xx... SUB #100.,R2 ;Reduce to range 00-99 85$: CALL R10OUT ;Output century MOV R2,R0 ;R0 = YY CALL R10OUT ;Output year /