IRQ handler for UP9600

c64/kernal/interrupts/ea31.default_irq_handler.s

@@ -1,10 +1,22 @@
 
 default_irq_handler:
 
+#if CONFIG_RS232_UP9600
+
+	jsr rs232_count_channels
+	cpx #$00
+	beq !+
+	jsr up9600_irq
+!:
+
+#endif // CONFIG_RS232_UP9600
+
+
 	jsr cursor_blink
 	jsr JSCNKEY
 	jsr JUDTIM // update jiffy clock
 
+
 #if CONFIG_TAPE_NORMAL || CONFIG_TAPE_TURBO
 
 	// Turn tape motor on/off depending on the button state
@@ -25,7 +37,8 @@ default_irq_handler:
 
 default_irq_handler_end_tape:
 
-#endif
+#endif // CONFIG_TAPE_NORMAL || CONFIG_TAPE_TURBO
+
 
 	// Acknowledge CIA interrupt and return
 	jmp clear_cia1_interrupt_flag_and_return_from_interrupt

c64/kernal/interrupts/fe47.default_nmi_handler.s

@@ -17,9 +17,10 @@ default_nmi_handler:
 	bne !+
 	jmp (ICART_WARM_START)
 !:
-
 	// According to C64 Wiki, if STOP key is pressed, the routine assumes warm start request
 
+	// XXX is it right? how to check that IRQ was caused by RESTORE?
+
 	jsr JSTOP
 	bcs !+
 	jmp return_from_interrupt // no STOP pressed