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@ -52,44 +52,44 @@ RAMC_PAGE_HI = $DE3F ; Page register high
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;
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INSTALL:
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;; write $55 into first page
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lda #0
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sta RAMC_PAGE_LO
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sta RAMC_PAGE_HI
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lda #$55
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sta RAMC_WINDOW
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;; write $55 into first page
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lda #0
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sta RAMC_PAGE_LO
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sta RAMC_PAGE_HI
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lda #$55
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sta RAMC_WINDOW
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;; write $AA into second page
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lda #1
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sta RAMC_PAGE_LO
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sta RAMC_PAGE_HI
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lda #$AA
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sta RAMC_WINDOW
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;; write $AA into second page
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lda #1
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sta RAMC_PAGE_LO
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sta RAMC_PAGE_HI
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lda #$AA
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sta RAMC_WINDOW
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;; check $55 in first page
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lda #0
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sta RAMC_PAGE_LO
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sta RAMC_PAGE_HI
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lda RAMC_WINDOW
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cmp #$55
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bne @notpresent
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;; check $55 in first page
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lda #0
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sta RAMC_PAGE_LO
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sta RAMC_PAGE_HI
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lda RAMC_WINDOW
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cmp #$55
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bne @notpresent
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;; check $AA in first page
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lda #1
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sta RAMC_PAGE_LO
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sta RAMC_PAGE_HI
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lda RAMC_WINDOW
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cmp #$AA
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bne @notpresent
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;; check $AA in first page
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lda #1
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sta RAMC_PAGE_LO
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sta RAMC_PAGE_HI
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lda RAMC_WINDOW
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cmp #$AA
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bne @notpresent
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lda #<EM_ERR_OK
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lda #<EM_ERR_OK
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ldx #>EM_ERR_OK
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rts
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rts
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@notpresent:
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lda #<EM_ERR_NO_DEVICE
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ldx #>EM_ERR_NO_DEVICE
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; use rts from UNINSTALL below
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; use rts from UNINSTALL below
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; ------------------------------------------------------------------------
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; UNINSTALL routine. Is called before the driver is removed from memory.
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@ -122,8 +122,8 @@ USE = MAP
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;
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MAP: sta RAMC_PAGE_LO
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txa
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and #1
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txa
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and #1
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sta RAMC_PAGE_HI
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lda #<RAMC_WINDOW
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ldx #>RAMC_WINDOW
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