X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=snes_test1;a=blobdiff_plain;f=hwregs.inc;h=5fd9f2c98f011cd3d69a0e0d82b880ef3c0cbb16;hp=672aedf4555e1c58f9b6dd4b1e2a1f77c2429a05;hb=097c3ec68b5ce13fffc3dbd09eb384716931fde1;hpb=4eaf4fddef0d94718453382fa2ccd799c8944f18

diff --git a/hwregs.inc b/hwregs.inc
index 672aedf..5fd9f2c 100644
--- a/hwregs.inc
+++ b/hwregs.inc
@@ -82,6 +82,8 @@
 	REG_MDMAEN	= $420b
 	REG_HDMAEN	= $420c
 
+	REG_HVBJOY	= $4212
+
 	REG_DMAP_BASE	= $4300
 	REG_BBAD_BASE	= $4301
 	REG_A1TL_BASE	= $4302
@@ -123,3 +125,11 @@
 	setreg REG_CGDATA, (g >> 3 | b << 2)
 	.endmacro
 
+	.macro wait_vblank
+@wait_vblank_loop:
+	lda REG_HVBJOY
+	and #$80
+	beq @wait_vblank_loop
+	.endmacro
+
+	; vi:ft=asm_ca65: