.Colours
   DCD      black, red, yellow, green, blue, magenta, white, cyan

.Data_Start
; General
;
#set Block             = Data_Start
#set Gcol_Colour       = Block+Block_Size
#set Gcol_Back_Colour  = Gcol_Colour+4
#set Screen_Base       = Gcol_Back_Colour+4
#set Screen_Start      = Screen_Base+4
#set Hpixels           = Screen_Start+4
#set Vpixels           = Hpixels+4
#set Bytes_Per_Line    = Vpixels+4
#set Screen_Size       = Bytes_Per_Line+4
#set Num_Banks         = Screen_Size+4
#set Draw_Bank         = Num_Banks+4
#set Display_Bank      = Draw_Bank+4
#set Enable_Banking    = Display_Bank+4
#set Escape_Flag       = Enable_Banking+4
#set Old_Error_Handler = Escape_Flag+4
; Stack
;
#set Stack             = Old_Error_Handler+Stack_Size
