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Cleanup

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This commit is contained in:
Karri Kaksonen 2022-04-07 07:22:19 +03:00
parent 3f8c29d303
commit 6b5c858b20
3 changed files with 23 additions and 12 deletions
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23
libsrc/atari7800/clrscr.s
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@ -4,7 +4,8 @@
.export _clrscr
.import _screen
.import pusha0,pushax, __bzero
.import pusha0,pushax
.include "extzp.inc"
.code
@ -12,10 +13,22 @@
lda #<(_screen)
ldx #>(_screen)
jsr pushax
ldx #>(charsperline * screenrows)
lda #<(charsperline * screenrows)
jmp __bzero
sta ptr7800
stx ptr7800+1
ldx #screenrows
@L1: ldy #charsperline
lda #0
@L2: sta (ptr7800),y
dey
bne @L2
lda ptr7800
clc
adc #charsperline
bcc @L3
inc ptr7800+1
@L3: dex
bne @L1
rts
.endproc

4
libsrc/atari7800/cputc.s
View File

@ -152,8 +152,8 @@ umula0:
sta ptr7800
bcc @L12
inx
@L12: clc
txa
@L12: txa
clc
adc #>(_screen)
sta ptr7800+1

8
libsrc/atari7800/setcursor.s
View File

@ -24,7 +24,7 @@
;
.export _setcursor
.export gotoxy, _gotoxy, _gotox, _gotoy, wherex, wherey
.export gotoxy, _gotoxy, _gotox, _gotoy, _wherex, _wherey
.export CURS_X, CURS_Y
.constructor init_cursor
@ -189,20 +189,18 @@ umula0:
;-----------------------------------------------------------------------------
; Get cursor X position
;
.proc wherex
.proc _wherex
lda CURS_X
jsr pusha0
rts
.endproc
;-----------------------------------------------------------------------------
; Get cursor Y position
;
.proc wherey
.proc _wherey
lda CURS_Y
jsr pusha0
rts
.endproc