INTERFACE COMMANDS
| CONT ENT DESC RIPTION | ||
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50 | Reserved | ||
51 - 52 | Obsolete | ||
53 | 15 | ||
| 2, 1 = the fields supported in words 88 are valid, 0 = the fields supported in words 88 are not valid | ||
| 1, 1 = the fields reports in words 64- 70 are valid, 0 = the fields reports in words | ||
| 0, 1 = the fields reports in words 54- 58 are valid, 0 = the fields reports in words | ||
54 | Number of current logical cylinders | ||
55 | Number of current logical heads | ||
56 | Number of logical sectors per track | ||
57 - 58 | C urrent capacity in sectors | ||
59 | 15- 9 = reserved | ||
| 8, 1 = multiple sector setting is valid | ||
| 7- 0 xxh = current setting for number of sectors that c anbe transferred per interrupt on Read/Write Multiple | ||
| command | ||
60 - 61 | Total number of user addressable sectors (LBA mode only) | ||
62 | obsolete | ||
63 | 15 | ||
| 10, 1 = Multi | ||
| 9, | 1 = Multi | |
| 8, | 1 = Multi | |
| 7- 3, = reserved | ||
| 2, | 1 = Multi | |
| 1, | 1 = Multi | |
| 0, | 1 = Multi | |
| |||
64 | 15 | ||
65 | Minimum multi | ||
66 | Manufacturer's recommeded multi- word DMA transfer cycle time | ||
67 | Minimum PIO transfer cycle time without flow control (15 | ||
68 | Minimum PIO transfer cycle time with IORDY flow control | ||
69 | reserved | ||
75 | Queue depth, 15 | ||
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76- 79 | reserved | ||
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80 | Major version number | ||
| 15, reserved, 14- 6 = reserved for | ||
| 5, 1 = | supports | |
| 4, 1 = | supports | |
| 3, 1 = supports | ||
| 2, 1 = supports | ||
| 1, obsolete | ||
| 0, reserved | ||
81 | Minor version number | ||
82 | C ommand set supported. If words 82 and 83 = 0000h or FFF Fh c ommand set notific ation not supported. | ||
| 15, obsolete | ||
| 14, 1 = supports the NOP command | ||
| 13, 1 = supports the Read Buffer command | ||
| 12, 1 = supports the Write Buffer command | ||
| 11, obsolete | ||
| 10, 1 = supports | ||
| 9, 1 = supports the Device Res et command | ||
| 8, 1 = supports Service Interupt | ||
| 7, 1 = s upports Release Interupt | ||
| 6, 1 = supports Look Ahead | ||
| 5, 1 = s upports Write Cache | ||
| 4, shall be cleared to zero | ||
| 3, 1 = s upports the Power M anagement feature command | ||
| 2, 1 = s upports the Removable Media feature command | ||
| 1, 1 = s upports the SecurityMode feature command | ||
| 0, 1 = supports the SMART feature set |
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