===== 09 JFF JOY FIFO AND IRQS | BIOS 19951204 System ROM Version 3.0 11/18/96 A
BadVaddr as the group starts: 00000480
10 bytes with RXEN, none read: STAT 0007
lw DATA FFFFFFFF (1st and 3 previews), STAT after 0007
lbu until STAT.1 clears: FF FF FF FF (4), then 3 more: 00 00 00
3 bytes, lhu DATA FFFF then STAT 0007, 2 left
TX IRQ CTRL 0401: before a byte STAT 0205 I7 1; 129:10200 294:10201 1316:10205
  acked, cond. still true: STAT 0205 I7 1
RX IRQ 1 byte CTRL 0805: before a byte STAT 0005 I7 0; 91:10203 1243:10207
  acked, cond. still true: STAT 0207 I7 1
RX IRQ 2 bytes CTRL 0905: before a byte STAT 0005 I7 0; 86:10203 1238:10207
  2nd byte: 93:10203 1237:10207
  acked, cond. still true: STAT 0207 I7 1
ACK IRQ CTRL 1001: before a byte STAT 0005 I7 0; 86:0 247:1 1277:5
  acked, cond. still true: STAT 0005 I7 0
TX+RX IRQ CTRL 0C01: before a byte STAT 0205 I7 1; 86:10201 1238:10205
  acked, cond. still true: STAT 0205 I7 1
RX IRQ 8 bytes CTRL 0B05: before a byte STAT 0005 I7 0; 91:10203 1243:10207
  acked, cond. still true: STAT 0207 I7 1
TX IRQ held, I_STAT.7 acked alone: I7 0 STAT 0205
Done.