APPENDIX TWELVE



     Label     Loc    JMP to
     DISKIV    E450   C6A3
     DISKINV   E453   C6B3
     CIOV      E456   E4DF
     SIOV      E459   C933
     SETBV     E45C   C272
     SYSBV     E45F   C0E2
     XITBV     E462   C28A
     SIOINV    E465   E95C
     SENDEV    E468   EC17
     INTINV    E46B   C00C
     CIOINV    E46E   E4C1
     SELFSV    E471   F223 (used to be BLKBVD)
     WARMSV    E474   C290
     COLDSV    E477   C2C8
     RBLOKV    E47A   FD8D
     CSOPIV    E47D   FCF7

     Several of these locations themselves are JMP locations to other
     routines, done to maintain compatibility with the older 800 OS.

     Some new fixed entry point vectors have been added:

     58496/E480   PUPDIV: Entry to power-on display (self-test
                  mode in all XL/XEs except 1200XL; Atari
                  logo screen display in the 1200XL). Try
                  X=USR(58496). Points to 61987 ($F223).
     58499/E483   SLFTSV: 1200XL only: entry to self-test mode.
                  Points to 20480 ($5000) (see PORTB above).
     58502/E486   PENTV: Entry to the handler uploaded from
                  peripheral or disk. Points to 61116 ($EEBC).
     58505/E489   PHUNLV: Entry to uploaded handler unlink.
                  Points to 59669 ($E915).
     58508/E48C   PHINIV: Entry to uploaded handler initializa-
                  tion. Points to 59544 ($E898).

58481          E471           SELFTST
     Entry into the self-test mode by typing BYE in BASIC or X =
     USR(58481). This used to be the blackboard (Memo Pad)
     mode--a feature parents used to entertain their children, while
     keeping them from actually tinkering with the system or pro-
     grams. In the 1200XL, this is the location of the logo screen. I
     miss the blackboard mode myself; the self-test isn't really all
     that useful. There is no equivalent mode to blackboard in the
     XL/XE system.