hexed: refactor init code a bit

[megadrive.git] / hexed / hexed.s

diff --git a/hexed/hexed.s b/hexed/hexed.s
index b7d9186..418ca5c 100644 (file)
--- a/hexed/hexed.s
+++ b/hexed/hexed.s
@@ -262,8 +262,18 @@ txt_exc:
 main:
        /* make sure io port 2 is doing inputs */
        move.b          #0,(0xa1000b).l
-       /* mask irqs during init */
+       /* make sure irqs are masked */
        move.w          #0x2700,sr
+       /* take care of TMSS */
+       move.b          (0xa10000).l,d0
+       andi.b          #0x0f,d0
+       beq             no_tmss
+       move.l          #0x53454741,(0xa14000).l
+       /* want cart, not OS rom if cart pops in */
+       move.w          #1,(0xa14100).l
+       /* touch VDP after TMSS setup? */
+       tst.w           (0xc00004).l
+no_tmss:
 
 .if COPY_TO_EXP
        /* copy to expansion device if magic number is set */