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atari5200: fix _clrscr to use correct screen size

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Could be different than default when linking with atari5200-conioscreen-20x12.o.
This commit is contained in:
Christian Groessler 2025-03-04 23:07:13 +01:00
parent b0220e5456
commit 16224cdd36
2 changed files with 3 additions and 2 deletions
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2
cfg/atari5200.cfg
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@ -15,7 +15,7 @@ MEMORY {
SEGMENTS {
ZEROPAGE: load = ZP, type = zp, optional = yes;
EXTZP: load = ZP, type = zp, optional = yes;
DLIST: load = ROM , type = ro, define = yes, optional = yes;
DLIST: load = ROM, type = ro, define = yes, optional = yes;
STARTUP: load = ROM, type = ro, define = yes, optional = yes;
LOWCODE: load = ROM, type = ro, define = yes, optional = yes;
ONCE: load = ROM, type = ro, optional = yes;

3
libsrc/atari5200/clrscr.s
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@ -7,8 +7,9 @@
.export _clrscr
.include "atari5200.inc"
.importzp ptr1
.importzp screen_width, screen_height
SCRSIZE = 480 ; 20x24: size of default conio atari5200 screen
SCRSIZE = screen_width * screen_height
_clrscr:lda SAVMSC ; screen memory
sta ptr1