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/vce.s
+++ b/libsrc/pcengine/vce.s
@@ -0,0 +1,16 @@
+
+ 						.include "pcengine.inc"
+            .export vce_init
+
+vce_init:
+                        stz     VCE_ADDR_LO   ;
+                        stz     VCE_ADDR_HI   ; Set CTA to zero
+                        ldy     #$01
+vce_clear_bank:         ldx     #$00
+vce_clear_color:        stz     VCE_DATA_LO   ; Clear color (LSB)
+                        stz     VCE_DATA_HI   ; Clear color (MSB)
+                        dex
+                        bne     vce_clear_color
+                        dey
+                        bne     vce_clear_bank
+                        rts