sw/adventure/IO.FT

   1         SUBROUTINE IO(RECORD)
   2 C
   3 C
   4 C       This function reads the direct access file and unpacks it.
   5 C       we put 6 13-character records into a single direct access record
   6 C       because OS/8 FORTRAN puts every record into a single block.
   7 C       Packing this saves one-sixth the space.
   8 C
   9         COMMON /TXTCOM/ RTEXT,LINES,ASCVAR,TXTLOC,DATA
  10         INTEGER RTEXT(205),LINES(12),DATA(78),RECORD
  11         INTEGER OLDREC,TXTLOC
  12 C       COMMON /RECMEM/OLDREC
  13         DATA    OLDREC/-1/
  14
  15 C       WRITE (1,111) RECORD
  16         IREC = RECORD/6 + 1
  17 C       WRITE (1,112) OLDREC, IREC
  18         IF (IREC .NE. OLDREC)READ(8'IREC)DATA
  19         OLDREC = IREC
  20         N = 13 * (MOD(RECORD-1,6)) + 1
  21         TXTLOC = DATA(N)
  22         DO 10 I = 1, 12
  23 10      LINES(I) = DATA(N+I)
  24         RETURN
  25 C111    FORMAT(' IO FOR  ', I15)
  26 C112    FORMAT(' IO, OLD=', I15, ' NEW=',I15)
  27         END