more compatible SETTIM and RDTIM routines

c64/kernal/rdtim.s

@@ -12,7 +12,6 @@ rdtim:
 
 	;; Disable interrupts for the duration of the routine, to prevent
 	;; jiffy clock update while reeading it's values
-	php
 	sei
 
 	;; Store the jiffy clock state
@@ -20,7 +19,9 @@ rdtim:
 	ldx TIME + 1
 	lda TIME + 2
 
-	;; Restore processor state and return
-	plp
+	;; Enable interrupts. More elegant solution would be pha + sei + ... + pla,
+	;; but (checked by running a test program) original ROM routine always
+	;; leaves IRQs enabled.
+	cli
 	rts
 

c64/kernal/settim.s

@@ -12,7 +12,6 @@ settim:
 
 	;; Disable interrupts for the duration of the routine, to prevent
 	;; jiffy clock update while changing it's values
-	php
 	sei
 
 	;; Store the jiffy clock state
@@ -20,7 +19,9 @@ settim:
 	stx TIME + 1
 	sta TIME + 2
 
-	;; Restore processor state and return
-	plp
+	;; Enable interrupts. More elegant solution would be pha + sei + ... + pla,
+	;; but (checked by running a test program) original ROM routine always
+	;; leaves IRQs enabled.
+	cli
 	rts