* ++++++++---S ¥¹¥¿¥Ã¥¯¥Ý¥¤¥ó¥¿
*
* note: fceu uses this differently
- * [7:0] - interrupt flags (same as above)
+ * [7:0] - flags (same as above)
* [15:8] - FCEU IRQ pending sources
* [16] - a flag which indicates that MapIRQHook is not null
* [23:17] - unused