<def f='src/src/sys/dev/isa/fdreg.h' l='120' ll='130'/>
<size>4</size>
<mbr r='fd_idfield_data::cylno' o='0' t='u_char'/>
<mbr r='fd_idfield_data::headno' o='8' t='u_char'/>
<mbr r='fd_idfield_data::secno' o='16' t='u_char'/>
<mbr r='fd_idfield_data::secsize' o='24' t='u_char'/>
