document authority for IRQ entry and exit sequence

2019-04-22 13:56:35 +09:30
1 parent 2fd27915f7
commit 7c31bca28e
@@ -8,6 +8,7 @@

 return_from_interrupt:
 	;; Restore registers and return
+	;; Sequence according to Compute's Mapping the 64 p73
 	pla
 	tay
 	pla
@@ -8,6 +8,7 @@ irq_handler:
 	;; Also the $0314 vector is widely used (e.g., https://www.lemon64.com/forum/viewtopic.php?t=2112&sid=6ea01982b26da69783120a7923ca46fb)
 	
 	;; Save registers
+	;; Sequence according to Compute's Mapping the 64 p73
 	pha
 	txa
 	pha