cc65/libsrc/geos-common/conio/_scrsize.s

;
; Maciej 'YTM/Elysium' Witkowiak
;
; Screen size variables
;
; 6.3.2001, 17.4.2003


	.export	xsize, ysize
	.export	screensize
	.importzp cursor_r, cursor_c
	.import _cursor
	.constructor initscrsize
		      
	.include "geossym.inc"

.segment	"INIT"

initscrsize:
.ifdef __GEOS_CBM__
	lda graphMode
	bpl L1
	lda #80			; 80 columns (more or less)
	.byte $2c
L1:	lda #40			; 40 columns (more or less)
	sta xsize
	lda #24			; something like that for Y size
.else
	lda #70			; 70 columns (more or less)
	sta xsize
	lda #23			; something like that for Y size
.endif
	sta ysize
	ldx #1
	stx cursor_r
	dex 
	stx cursor_c
	txa 
	jmp _cursor		; home and update cursor

.code

screensize: 
	ldx xsize
	ldy ysize
	rts

.bss

xsize:
	.res 1
ysize:
	.res 1