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5.3 Host Commands
C141-E050-02EN 5-33
Word Value
Description
20 X’0000’
Undefined
21 X’0000’
Undefined
22 X’0004’
Number of ECC bytes transferred at READ LONG or
WRITE LONG command
23-26
–
Firmware revision (ASCII code) *3
27-46
–
Model name (ASCII code) *4
47 X’8010’
Maximum number of sectors per interrupt on
READ/WRITE MULTIPLE command
48 X’0000’
Reserved
49 X’0B00’
Capabilities *5
50 X’0000’
Reserved
51 X’0200’
PIO data transfer mode *6
52 X’0000’
Reserved
53 X’0007’
Enable/disable setting of words 54-58 and 64-70, 88 *7
54
(Variable)
Number of current Cylinders
55
(Variable)
Number of current Head
56
(Variable)
Number of current sectors per track
57-58
(Variable)
Total number of current sectors
59 *8
Transfer sector count currently set by READ/WRITE
MULTIPLE command *8
60-61
X’60F600’
X’7A2F80’
Total number of user addressable sectors (LBA mode only)
MHC2032AT: X’60F600’
MHC2040AT: X’7A2F80’
MHD2021AT: X’409980’
MHD2032AT: X’60F600’
62 X’0000’
Reserved
63
X’xx07’
Multiword DMA transfer mode *9
64 X’0003’
Advance PIO transfer mode support status *10
65 X’0078’
Minimum multiword DMA transfer cycle time per word :
120 [ns]
66 X’0078’
Manufacturer’s recommended DMA transfer cycle time :
120 [ns]
67 X’00F0’
Minimum PIO transfer cycle time without IORDY flow
control : 240 [ns]
68 X’0078’
Minimum PIO transfer cycle time with IORDY flow control
: 120 [ns]