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Change display logic of mouse cursor (hide and show functions).

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This commit is contained in:
Christian Groessler 2014-01-14 14:00:17 +01:00
parent 2be7c7c88d
commit 09aa007191
1 changed files with 12 additions and 9 deletions
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21
libsrc/atari/mcbdefault.s
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@ -49,13 +49,12 @@ cursor = 11 ; '+' screen code'
getcursor: getcursor:
column: ldy #$00 ; Patched at runtime column: ldy #$00 ; Patched at runtime
lda (scrptr),y ; Patched at runtime lda (scrptr),y
cmp #cursor
rts rts
setcursor: setcursor:
lda #cursor column2:ldy #$00 ; Patched at runtime
setscr: sta (scrptr),y ; Patched at runtime sta (scrptr),y
rts rts
; ------------------------------------------------------------------------ ; ------------------------------------------------------------------------
@ -67,16 +66,19 @@ done:
; Hide the mouse cursor. ; Hide the mouse cursor.
hide: hide:
jsr getcursor ; Cursor visible at current position? jsr getcursor ; Get character at cursor position
bne done ; No, we're done cmp #cursor ; "mouse" character
lda backup ; Get character at cursor position bne overwr ; no, probably program has overwritten it
jmp setscr ; Draw character lda backup ;
jmp setcursor ; Draw character
overwr: sta backup
rts
; Show the mouse cursor. ; Show the mouse cursor.
show: show:
jsr getcursor ; Cursor visible at current position? jsr getcursor ; Cursor visible at current position?
beq done ; Yes, we're done
sta backup ; Save character at cursor position sta backup ; Save character at cursor position
lda #cursor
jmp setcursor ; Draw cursor jmp setcursor ; Draw cursor
@ -87,6 +89,7 @@ movex:
lsr a ; convert to character position lsr a ; convert to character position
lsr a lsr a
sta column+1 sta column+1
sta column2+1
rts rts
; Move the mouse cursor y position to the value in A/X. ; Move the mouse cursor y position to the value in A/X.