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added mousemem constructor

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git-svn-id: svn://svn.cc65.org/cc65/trunk@535 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cpg 2000-12-03 21:39:12 +00:00
parent ed08b2f772
commit 86e8c03001
1 changed files with 21 additions and 1 deletions
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22
libsrc/atari/mouse.s
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@ -14,8 +14,9 @@
.export _mouse_init, _mouse_done, _mouse_box
.export _mouse_show, _mouse_hide, _mouse_move
.export _mouse_buttons
.constructor mousemem
.import popa,popax,mouse_pm0
.import popa,popax
.include "atari.inc"
@ -35,6 +36,23 @@ pmsize = 16 ; y size pm shape
xinit = defxmin ; init. x pos.
yinit = defymin ; init. y pos.
;--------------------------------------------------------------------
; reserve memory for the mouse pointer
mousemem:
lda APPMHI+1
and #%11111000 ; make 2k aligned
sec
sbc #%00001000 ; reserve 2k
tax
adc #3 ; add 4 (C = 1)
sta mouse_pm0
lda #0
sta APPMHI
stx APPMHI+1
rts
;--------------------------------------------------------------------
; Initialize mouse routines
; void __fastcall__ mouse_init (unsigned char port, unsigned char sprite, unsigned char type);
@ -533,3 +551,5 @@ mouse_on:
.res 1
port_nr:
.res 1
mouse_pm0:
.res 1