Make your own free website on Tripod.com
Up ] Docs Home ]

Format of SMARTDRV status record

Back ] Next ]

Offset Size Description

00h

BYTE

write-through flag (always 01h)

01h

BYTE

writes should be buffered (always 00h)

02h

BYTE

cache enabled if 01h

03h

BYTE

driver type
01h = extended memory
02h = expanded

04h

WORD

clock ticks between cache flushes (currently unused)

06h

BYTE

cache contains locked tracks if nonzero

07h

BYTE

flush cache on INT 19 reboot if nonzero

08h

BYTE

cache full track writes if nonzero

09h

BYTE

double buffering (for VDS) state
00h = off
01h = on
02h = dynamic

0Ah

DWORD

original INT 13 vector

0Eh

BYTE

minor version number

0Fh

BYTE

major version number

10h

WORD

unused

12h

WORD

sectors read

may be scaled rather than absolute counts

14h

WORD

sectors already in cache

16h

WORD

sectors already in track buffer

18h

BYTE

cache hit rate in percent

19h

BYTE

track buffer hit rate in percent

1Ah

WORD

total tracks in cache

1Ch

WORD

number of tracks in use

1Eh

WORD

number of locked tracks

20h

WORD

number of dirty tracks

22h

WORD

current cache size in 16K pages

24h

WORD

original (maximum) cache size in 16K pages

26h

WORD

minimum cache size in 16K pages

28h

DWORD

pointer to byte flag to increment for locking cache contents