Name		VIC-20 Expanded;
	Device		G20V8AS;
	Designer	Ruud Baltissen;
	Date		20xx-xx-xx;
	Revision	V0.1;

	Assembly	--;
	Company 	--;
	Location	--;
	Partno 		--;

    
/* Define Logic Operators */
	/* AND = &  */
	/* OR  = #  */
	/* NOT = !  */     


/* Define Input Pins */
pin  1 = GALCLK;	/* clock input */
pin  2 = RW;		/* R/W line */
pin  3 = A4; 		/*  */
pin  4 = A5; 		/*  */
pin  5 = BROMi;		/* BASIC ROM */
pin  6 = SROMi; 	/* System ROM */
pin  7 = BLK5; 		/*  */
pin  8 = ORGR;		/* choose EEPROM or original ROMs */
pin  9 = PA2;		/* PA2 from extra 6522, VIA2 */
pin 10 = PA1;		/* PA1 from extra 6522, VIA2 */
pin 11 = PA0;		/* PA0 from extra 6522, VIA2 */
pin 13 = GALOE;		/* OE input */
pin 14 = ERWE;		/* enable R/W EEPROM */
pin 23 = GALNU2;	/* not used */

/* Define Output Pins */
pin 15 = VIAe;		/* extra 6522 */
pin 16 = GALNU3;	/* not used */
pin 17 = SRAM;		/* SRAM from $8000 - $FFFF */
pin 18 = EROM;		/* EEPROM replacement of original ROMs */
pin 19 = BROMo;		/* output to BASIC ROM */
pin 20 = SROMo;		/* output to System ROM */
pin 21 = BLK5o;		/* output to BLK5 */
pin 22 = RWE;		/* sub part */

/* Boolean Equations */
VIAe  = !(A4 # A5);
RWE   = RW # !ERWE;
SRAM  = (PA0 # BLK5) & ((RWE & PA1) # BROMi) & ((RWE & PA2) # SROMi);
EROM  = ((!PA1 # BROMi) & (!PA2 #SROMi)) # !RWE # ORGR;
BROMo = !(ORGR & PA1 & !BROMi & RW);
SROMo = !(ORGR & PA2 & !SROMi & RW);
BLK5o = !PA0 # BLK5;