APPENDIX EIGHTEEN



     61250      00     $EF42, $00   low byte, baud rate init
                                    routine
     61255      04     $EF47, $04   high byte
     61346      00     $EFA2, $00   baud rate open routine
     61351      04     $EFA7, $04   high byte
     61371      02     $EFBB, $02   leader time

61683-61707    F0F3-F10B      ....
     Memo pad mode startup message; "ATARI COMPUTER - MEMO
     PAD (CR)."

61709-61718    F10D-F116      ....
     BOOT ERROR message. This is at 50237 ($C43D) in the XL/XE.

61812          F174           ....
     Left margin default; initially 2.

61816          F178           ....
     Right margin default; initially at the maximum 39 ($27).

63227-63229    F6FB-F6FD      ....
     Key click sound, change these three bytes to 234 ($EA) to dis-
     able the key click sound completely.

64728          FCD8           CLICK
     You can also remove the click sound by changing the first byte
     of the routine here to 96 ($60; RTS).

64729          FCD9           ....
     The buzzer/bell time for warning sound prompts. Initially 127
     ($7F), you can reduce it to any time; 63($3F) is half the time.
     This location also affects the key click sound time.

65217-65221    FEC1-FEC5      ....
     Default (startup) color value tables. These values are moved to
     the shadow registers 708-712 ($2C5-$2C8) on power-up or RE-
     SET. The screen startup is blue; to change it to black, POKE
     65219 ($FEC3), 0.

65278          FEFE           ....
     The keyboard table; you can redefine the entire keyboard by
     POKEing here (see the XL/XE map section). One trick is to
     change the keyboard so that the cursor (arrow) keys work on
     pressing, and you have to press SHIFT and arrow to get -, =,
     +, and *, and CONTROL and arrow to get <up arrow>, <down arrow>,
     <left arrow>, and <right arrow>. Do
     this by: