seek	=$0a26
curtrk_smc	=$0a2b
phase_smc	=$0a31
driveon	=$0a9d
driveoff	=$0a22
switch_drive1	=$08af
switch_drive2	=$08c1
load_new	=$0aab
load_address	=$0ac4
load_track=load_address+1
load_sector=load_address+2
load_length=load_address+3