===== 12 JPD PAD IN SLOT 1 | BIOS 19951204 System ROM Version 3.0 11/18/96 A
BadVaddr as the group starts: 00000480
Slot 1, 01 42 00 00 00..., every change of JOY_STAT (+I_STAT.7 at bit 16):
  01->FF 145:0 289:1 1318:5 1470:7 1746:10287 1836:10207
  42->41 92:1 1226:5 1378:7 1655:10287 1745:10207
  00->5A 92:0 232:1 1269:5 1421:7 1759:10287 1849:10207
  00->FF 93:0 228:1 1250:5 1404:7 1681:10007 1771:10287 1861:10207
  00->FF 92:0 232:1 1256:5 1408:7
send 01 42 00 00 00 00 00 00 00
  got  FF 41 5A FF FF (4 acked)
  /ACK at 1746 1655 1759 1771; low for 90 90 90 90
8 more reads (/ACK times per byte):
 4: FF 41 5A FF FF | 1676 1671 1797 1735
 4: FF 41 5A FF FF | 1663 1680 1613 1729
 4: FF 41 5A FF FF | 1671 1678 1695 1740
 4: FF 41 5A FF FF | 1664 1666 1618 1730
 4: FF 41 5A FF FF | 1661 1675 1672 1741
 4: FF 41 5A FF FF | 1671 1678 1605 1740
 4: FF 41 5A FF FF | 1664 1666 1618 1730
 4: FF 41 5A FF FF | 1661 1675 1672 1741
01h, tight loop: /ACK after, low for: 1702/95 1702/107 1702/107 1713/96 1702/107 1702/96 1702/107 1702/107
Ack while /ACK low (seen at 1696): STAT then 0287; after /ACK high 0207; acked again 0007
01h with CTRL 0003 (no ACK IRQ): 93:1 1158:5 1315:7 1653:87 1743:7
01h at once after selecting: 98:0 212:1 1301:5 1462:7 1738:10287 1828:10207
Done.