===== 01 BUF F30 BUFFER AT START | BIOS 19951204 System ROM Version 3.0 11/18/96 A
BadVaddr as the group starts: 0000000B
RDDATA with BFRD before any drive command from this program, twice.
First read: HSTS 18, with BFRD 58 after 1 polls, after 16 reads 58, BFRD off 18.
  RDDATA: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Second read: HSTS 18, with BFRD 58 after 1 polls, after 16 reads 58, BFRD off 18.
  RDDATA: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RDDATA with BFRD: before any command, after Test 21h, Getstat, Getparam, Init.
Switches (Test 21h, bit1 door open, bit0 head at POS0): int3 00 @135888. Getstat: int3 02 @29750. Mode 80. HINTMSK was 00.
After Test 21h, Getstat and Getparam: HSTS 18, with BFRD 58 after 1 polls, after 16 reads 58, BFRD off 18.
  RDDATA: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Init: int3 02 @73730 int2 02 @13586002
After Init: HSTS 18, with BFRD 58 after 1 polls, after 16 reads 58, BFRD off 18.
  RDDATA: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Getstat: int3 02 @20328
After a Getstat: HSTS 18, with BFRD 58 after 1 polls, after 16 reads 58, BFRD off 18.
  RDDATA: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Mode 20 put back to 80: int3 02 @41122
Done.