Differences

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--- base:the_double_irq_method [2016-11-05 21:10] – [Theory] monte_carlos
+++ base:the_double_irq_method [2016-11-05 21:12] (current) – [Theory] monte_carlos
@@ Line 70: / Line 70: @@
 fixcycle bit $d020
 ...
 </code>
+The corresponding irq init looks like this:
+<code>
+.PROC irqInit
+		lda #$7f
+		 sta $dc0d
+		 bit $dc0d
+		 lda #$81
+		 sta $d01a
+		 lda #<irq0
+		 sta $0314
+		 lda #>irq0
+		 sta $0315
+		 lda #<irq
+		 sta $fffe
+		 lda #>irq
+		 sta $ffff
+		 lda #$38
+		 sta $d012
+		 lda #$36
+		 sta $01
+		 lsr $d019
+	 rts
+.ENDPROC
+The lsr $d019 at the end of the init is performed to clear the irq request if for some reason a rasterirq request is rised during init.
+</code>