added interrupt examples

.gitignore

@@ -0,0 +1,2 @@
+*.lst
+*.cod

blink/Makefile

@@ -22,7 +22,7 @@ clean:
 	rm -f $(SRC:.c=.asm) $(SRC:.c=.cod) $(SRC:.c=.hex) $(SRC:.c=.lst) $(SRC:.c=.o)
 
 program:
-	pk2cmd -M -P${PPROC} -Fout.hex
+	pk2cmd -M -P${PPROC} -Fmain.hex
 
 asm: *.asm
 	gpasm -p ${ASMPROC} -o main.hex $^

interrupt/main.asm

@@ -40,8 +40,8 @@ MAIN_LOOP:
 
 ; === Interrupt Service Routine ===
 ISR:
-    BTFSS INTCON, RBIF  ; Check if RB Change interrupt occurred
-    RETFIE              ; Return if not triggered
+    ;BTFSS INTCON, RBIF  ; Check if RB Change interrupt occurred
+    ;RETFIE              ; Return if not triggered
     ;BTFSS INTCON, INT0IF
     ;RETFIE
 
@@ -58,6 +58,7 @@ ISR:
     
     BCF INTCON, RBIF    ; Clear the RBIF flag
     BCF INTCON, INT0IF
+    BCF INTCON, INT1IF
     RETFIE              ; Return from interrupt
 
     END

interrupt/main.hex

@@ -1,10 +1,10 @@
 :020000040000FA
 :0400000006EF00F017
-:0800080019EF00F0FF0E936EEA
+:0800080017EF00F0FF0E936EEC
 :10001000956A8C6A0F0EC16EF19EF180F286F28EA7
-:10002000F28CF288F18CF286F18A81CF83FF15EF92
-:1000300000F0F2A01000815000000000000000005D
-:0A00400081CF83FFF290F2921000CE
+:10002000F28CF288F18CF286F18A15EF00F08150A3
+:10003000000000000000000081CF83FFF290F292E8
+:04004000F29010002A
 :020000040030CA
 :04000000000C1F1EB3
 :020005008381F5

test/main.asm

@@ -24,18 +24,7 @@ Start:
     MOVWF TRISB
 
 loop:
-    movlw 0xff
-    addwf PORTB
-    btfsc STATUS, 0
-    goto on
-    goto off
-on:  
-    movlw 0x01
-    movwf PORTD
+    movff PORTB, PORTD
     goto loop
-off:  
-    movlw 0x00
-    movwf PORTD
-    goto loop
-
+    
     END                      ; End of program

test/main.hex

@@ -1,7 +1,6 @@
 :020000040000FA
 :10000000956A8C6A8A6AF19E0F0EC16EFF0E936E1E
-:10001000FF0E8126D8B00FEF00F013EF00F0010EB5
-:0E002000836E08EF00F0000E836E08EF00F014
+:0800100081CF83FF08EF00F02F
 :020000040030CA
 :04000000000C1F1EB3
 :02000500038175