BEGIN BMC1  BMC IF800 Model 20 - DSDD 48 tpi 5.25" - 512 x 10
DENSITY MFM ,LOW 
CYLINDERS 40 SIDES 2 SECTORS 10,512
SIDE1 0 1,7,13,19,5,11,17,3,9,15
SIDE2 1 1,7,13,19,5,11,17,3,9,15
ORDER SIDES 
LABEL BMC1
BSH 4 BLM 15 EXM 0 DSM 191 DRM 127 AL0 0C0H AL1 0 OFS 3
END