decoding quadrature encoders

[ice]

Thanks Luciano,
Im read up the pbp manual and others for interrupts...
..however my test program isnt compiling..

		wsave 	VAR BYTE $20 system				'bank0
		wsave1 	VAR BYTE $a0 system				'bank1
		'wsave2 	VAR BYTE $120 system		'bank2
		'wsave3 	VAR BYTE $1a0 system		'bank3
		ssave 	VAR BYTE bank0 system
		psave 	VAR BYTE bank0 system
		led 	VAR PORTB.1
		
		GoTo start_0 					' Skip around interrupt handler	


		DEFINE INTLHAND myint			' DEFINE INTERRUPT handler
		Asm
myint:	bsf _led 						; Turn on LED (for example)
		bcf intcon.0
				
		retfie
		EndAsm
    
	
		
										' Assembly language INTERRUPT handler    
		

    
start_0:
		
		TRISB=%11111101	
		Low led 						' Turn LED off
		INTCON = %10001000				' Enable INTERRUPT ON PORTB.0
        
	
loop: 		GoTo loop 						' Wait here till interrupted

1> compile error "DEFINE INTHAND myint"
....undefined symbol myint
however if i relpace it with DEFINE INTLHAND myint,(which is only for th 18x series),it complies ok..

2>im using a 16F873A,which has a 4K flash,meaning 4 banks...
according to the PBP manual, i have to define wsave,wsave1,wsave2,wsave3...
it takes in wsave and wsave1...but when i declare wsave2 and wsave3..it gives a RAM_END 255 error

3>i cannot get the LED to blink either by using the int0 or the Interr On change<4:7>