; life.h

; declartions that create the board on which the game is played

LOG2WID =       7               ; log to the base 2 of the width
WIDTH   =       1<<LOG2WID      ; maximum board width (128)
HEIGHT  =       64              ; maximum board height

GUTTER  =       1               ; width around board that is ignored

        COMMON  BINFO,BSIZE
BWIDTH  =       0               ; displacement of width to actually use
BHEIGHT =       4               ; displacement of height to actually use
BBOARD  =       8               ; start of board itself
BSIZE   =       BBOARD+(HEIGHT<<LOG2WID) ; allocates HEIGHTxWIDTH bytes
PBINFO: W       BINFO

; values that indicate states of cells of board

DEAD    =       2#00000000      ; value indicating dead (may not change this)
LIVE    =       2#00000001      ; value indicating alive (may not change this)
GENSHIFT=       4               ; shift to advancing to next generation
SURVIVE =       LIVE<<GENSHIFT  ; value indicating birth or survival

; RULE:  to advance one generation, or in SURVIVE in all cells that
; will be alive in the next generation, and then shift all cells
; over GENSHIFT places to compute next generation.

	END