;4x1MB EPROM, 8KB FRAM Mapper for SNES
;Written by Osman Celimli
TITLE PAL Mapper
PATTERN Final
REVISION 1.00
AUTHOR Osman Celimli
COMPANY Self
DATE 3/31/2010 
CHIP zzz PALCE16V8


;Pinout Mapping
;1-10
Clk NC Reset Cart A13 A14 A15 A20 A21 GND
;11-20
NC NC NC NC /FRCE /EPCE3 /EPCE2 /EPCE1 /EPCE0 VCC


;State Equations
EQUATIONS
; ROM Mapper, Note that CartEn is active low
; All outputs are also active low
EPCE0 = (/Cart*/A21*/A20)
EPCE1 = (/Cart*/A21*A20)
EPCE2 = (/Cart*A21*/A20)
EPCE3 = (/Cart*A21*A20)
; FRAM Mapper, should appear in $00:6000-$00:$7FFF
; Or any bank with this address range when Cart is high
; Also active low
FRCE = (Cart*Reset*/A20*/A21*/A15*A14*A13)