struc dpt
.steprate	resb 1
.dmahdld	resb 1
.motoroff	resb 1
.sectorsize	resb 1
.lastsector	resb 1
.gaplen		resb 1
.dtl		resb 1
.gapfmt		resb 1
.fillchar	resb 1
.hdsettle	resb 1
.motoron	resb 1
endstruc