+ if(bnstate & PAD_LEFT) {
+ if(scroll > 256) scroll--;
+ } else if(bnstate & PAD_RIGHT) {
+ if(scroll < 704) scroll++;
+ }
+ dbgval[0] = scroll;
+}
+
+void simba_vblank(void)
+{
+ vdp_setup_addr(VDP_VRAM, 0xf000); /* hscroll table is at f000, see vdp.S */
+ if(scroll < 512) {
+ VDP_DATA = 0;
+ } else {
+ VDP_DATA = 1024 - scroll;
+ }
+ VDP_DATA = 512 - (scroll >> 1);