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