26

Marathon 810 (ST9816AG) Product Manual, August 1995

 

 

 

Word

Description

ST9816AG

 

 

 

27–46

Drive model number: (40 ASCII characters,

ST9816AG

 

padded with blanks to end of string)

47

Maximum sectors per interrupt on read/write

0010H

multiple

 

 

 

 

 

48

Double word I/O (not supported)

0000H

 

 

 

 

Standby timer (ATA compliant), IORDY

 

49

(supported/can be disabled), LBA mode

2F00H

 

(supported), DMA mode (supported)

 

 

 

 

50

ATA reserved

0000H

 

 

 

51

PIO data-transfer cycle timing mode

0200H

 

 

 

52

DMA transfer cycle timing mode (not used)

0000H

 

 

 

53

Validity of words 54–58 and words 64–70

0003H

(words may be valid)

 

 

 

 

 

54

Number of cylinders (current emulation mode)

xxxxH

 

 

 

55

Number of heads

xxxxH

(current emulation mode)

 

 

 

 

 

56

Number of sectors per track

xxxxH

(current emulation mode)

 

 

 

 

 

57–58

Number of sectors (current emulation mode)

xxxxH

 

 

 

59

Number of sectors transferred during a Read

01xxH

Multiple or Write Multiple command

 

 

 

 

 

60–61

LBA sectors available (1,583,648)

182A20H

 

 

 

62

Single-word DMA active/DMA modes supported

0x07H

(see Note following table)

 

 

 

 

 

63

Multiword DMA active/DMA modes supported

0x07H

(see Note following table)

 

 

 

 

 

64

Advanced PIO modes supported (modes 3 and

0003H

4 supported)

 

 

 

 

 

65

Minimum multiword DMA transfer cycle time

0078H

per word (120 nsec)

 

 

 

 

 

66

Recommended multiword DMA transfer cycle

00B4H

time per word (180 nsec)

 

 

 

 

 

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