**********
BACKGROUND AND BACKGROUND TILES
**********

#Keen 1 background tiles behave like Keen 3
#This section affects points
%patch $4409      $26 $8B $07 $B6 $0D $F6 $FE 
%patch $4410  $F6 $EE $26 $89 $07 $E9 $60 $01 

%patch $4482  $E9 $74 $FF 
%patch $44BA  $E9 $3C $FF 
%patch $4513  $E9 $E3 $FE 

#This section affects doors
%patch $28EC                  $26 $8B $07 $B6 
%patch $28F0  $0D $F6 $FE $F6 $EE $26 $89 $07 
%patch $28F8  $03 $1E $08 $6C $03 $1E $08 $6C 
%patch $2900  $26 $89 $07 $90 $90 $90 $90 $90 


**********
BATTERY
**********

See ITEMS


**********
BORDER AND BORDER COLORS
**********

To change the border colors, see PALETTES AND BORDERS


**********
BRIDGES AND SWITCHES
**********


#Bridge extension time (Per block, set both the same)
%patch $4AA0 $0C
%patch $4AA6 $0C

#Bridge retraction time (Per block, set both the same)
%patch $4B0F $0C
%patch $4B15 $0C 

#Bridge block
%patch $4AEE $0E $01
%patch $4B3D $0E $01

#Animating switch
%patch $36DB $E0 $01 #This tile when flipped becomes...
%patch $36E0 $ED $01 #This tile and...
%patch $36FC $ED $01 #This tile when flipped becomes...
%patch $3716 $E0 $01 #This tile.

#lightswitch tile 
%patch $36D6 $0F $01 

#Sound light(?) switch makes when flipped
%patch $35DB $19 $00

#Switch tiles change to the next in the tileset when flipped 
#Doesn't affect lightswitch; switches don't need to be the same as in Keen 2
%patch $36D5 $05 $01 $00 $26 $89 $07 $90 $90 $90 $90 $90 $90 $90 $90 $90

#Bridges stop growing ONLY when they find a tile...
%patch $4ACB $7D #Less than the one they started on
%patch $4ACB $7C #Greater than the one they started on

#Disable bridges, but switches still animate, etc
%patch $4ACB $90 $90

#Bridges 'nibble' the first non-same tile they encounter,
#Which means you can keep making them longer... and longer...
%patch $4AD2 $90 $90

#Disable bridge retraction
%patch $4B3F $7C

#Once a bridge is extended and retracted, it
#cannot be extended again (On try bridge!)
%patch $4B43 $40

#Bridges 'nibble' a tile when retracted, in effect this
#Means when a bridge is retracted, it changes one extra tile
%patch $4B46 $90 $90



**********
BUTLER BOTS
**********

For patches affecting Butler bot speed, behaviour, etc, see the directory SPRITE PATCHES in the Keen1
folder. It contains all known patches to do with all sprites.