+
+ move.w #(488/10), d0 /* waste cycles */
+0: dbra d0, 0b
+
+ ymwrite a0, a1, #0x24, #0xf0 /* 30 show that rewriting count */
+ ymwrite a0, a1, #0x25, #0x00 /* 30 does nothing until timer expires */
+
+ move.w #(488*2/10), d0 /* waste cycles */
+0: dbra d0, 0b
+
+ ymwrite a0, a1, #0x26, #0xfc /* 30 same for timer b */
+ ymwrite a0, a1, #0x27, #0x0f /* 30 setting already set bits too */
+ moveq.l #0, d0
+ moveq.l #3, d1