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more compatible SETTIM and RDTIM routines

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FeralChild64 committed 2019-09-02 17:07:55 +02:00
1 parent 1c2b498e15
commit 33393ea824
2 files changed
+8 -6
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c64/kernal/rdtim.s
+4 -3
View File
@@ -12,7 +12,6 @@ rdtim:
;; Disable interrupts for the duration of the routine, to prevent ;; Disable interrupts for the duration of the routine, to prevent
;; jiffy clock update while reeading it's values ;; jiffy clock update while reeading it's values
php
sei sei
;; Store the jiffy clock state ;; Store the jiffy clock state
@@ -20,7 +19,9 @@ rdtim:
ldx TIME + 1 ldx TIME + 1
lda TIME + 2 lda TIME + 2
;; Restore processor state and return ;; Enable interrupts. More elegant solution would be pha + sei + ... + pla,
plp ;; but (checked by running a test program) original ROM routine always
;; leaves IRQs enabled.
cli
rts rts
c64/kernal/settim.s
+4 -3
View File
@@ -12,7 +12,6 @@ settim:
;; Disable interrupts for the duration of the routine, to prevent ;; Disable interrupts for the duration of the routine, to prevent
;; jiffy clock update while changing it's values ;; jiffy clock update while changing it's values
php
sei sei
;; Store the jiffy clock state ;; Store the jiffy clock state
@@ -20,7 +19,9 @@ settim:
stx TIME + 1 stx TIME + 1
sta TIME + 2 sta TIME + 2
;; Restore processor state and return ;; Enable interrupts. More elegant solution would be pha + sei + ... + pla,
plp ;; but (checked by running a test program) original ROM routine always
;; leaves IRQs enabled.
cli
rts rts