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optimized the sei/cli pairing a bit.

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This commit is contained in:
Marco van den Heuvel 2015-12-02 00:21:55 -08:00
parent 18208f4d2e
commit 7cd80e7450
1 changed files with 10 additions and 10 deletions
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20
libsrc/c128/emd/c128-ram.s
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@ -96,8 +96,7 @@ PAGECOUNT:
; by the driver.
;
MAP: sei
sta curpage
MAP: sta curpage
stx curpage+1 ; Remember the new page
clc
@ -108,6 +107,7 @@ MAP: sei
lda #<ptr1
sta FETVEC
sei
; Transfer one page
@ -116,12 +116,12 @@ MAP: sei
sta window,y
iny
bne @L1
cli
; Return the memory window
lda #<window
ldx #>window ; Return the window address
cli
rts
; ------------------------------------------------------------------------
@ -136,8 +136,7 @@ USE: sta curpage
; ------------------------------------------------------------------------
; COMMIT: Commit changes in the memory window to extended storage.
COMMIT: sei
lda curpage ; Get the current page
COMMIT: lda curpage ; Get the current page
ldx curpage+1
bmi done ; Jump if no page mapped
@ -149,6 +148,7 @@ COMMIT: sei
lda #<ptr1
sta STAVEC
sei
; Transfer one page. Y must be zero on entry
@ -157,11 +157,11 @@ COMMIT: sei
jsr STASH
iny
bne @L1
cli
; Done
done: cli
rts
done: rts
; ------------------------------------------------------------------------
; COPYFROM: Copy from extended into linear memory. A pointer to a structure
@ -170,7 +170,6 @@ done: cli
;
COPYFROM:
sei
sta ptr3
stx ptr3+1 ; Save the passed em_copy pointer
@ -201,6 +200,7 @@ COPYFROM:
; Copy full pages
ldy #$00
sei
@L1: ldx #MMU_CFG_RAM1
jsr FETCH
sta (ptr2),y
@ -237,8 +237,7 @@ COPYFROM:
; The function must not return anything.
;
COPYTO: sei
sta ptr3
COPYTO: sta ptr3
stx ptr3+1 ; Save the passed em_copy pointer
ldy #EM_COPY::OFFS
@ -268,6 +267,7 @@ COPYTO: sei
; Copy full pages
ldy #$00
sei
@L1: lda (ptr2),y
ldx #MMU_CFG_RAM1
jsr STASH