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Old 10 September 2016, 21:27   #14
mark_k
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Join Date: Aug 2004
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The REQUEST SENSE data for "SASI CHS" drives is similar. See OMTI_5510_Winchester_Controller_Jun85.pdf page B1 (PDF page 53).

sasi_chs_sense_data[1] bits [4:0] is head number
sasi_chs_sense_data[2] bits [7:6] is the high two bits of cylinder number, bits [5:0] is sector number
sasi_chs_sense_data[3] is the low byte of cylinder number
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