initial import, completely untested, does not compile yet

2014-11-29 14:18:48 +01:00
parent fed3179d3b
commit faccc5a3d6
23 changed files with 1974 additions and 0 deletions
--- a/libsrc/pcengine/clrscr.s
+++ b/libsrc/pcengine/clrscr.s
@@ -0,0 +1,27 @@
+
+		.include "pcengine.inc"
+
+
+		.export _clrscr
+_clrscr:
+
+                        st0     #VDC_MAWR
+                        st1     #<$0000
+                        st2     #>$0000
+
+						st0     #VDC_VWR     
+                        ldy     #$40
+rowloop:                ldx     #$80
+colloop:
+						lda #' '
+						staio VDC_DATA_LO
+						lda #$02
+						staio VDC_DATA_HI
+
+                        dex
+                        bne     colloop
+                        dey
+                        bne     rowloop
+
+ 		                rts
+