module z80_adr_decoder

declarations 
dev device 'P16v8';
IOR, a4, a5, a6, a7, MEMREQ pin 1,2,3,4,5,6;
ROMCE, RAMCE, PIO1CE, PIO2CE, CTCCE pin 16, 12, 13, 14, 15;


equations
!ROMCE	= (!MEMREQ & !a7);
!RAMCE	= (!MEMREQ & a7);
!PIO1CE = (!IOR & a4 & !a5 & !a6);
!PIO2CE = (!IOR & a5 & !a4 & !a6);
!CTCCE	= (!IOR & a6 & !a5 & !a4);

end z80_adr_decoder