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AX = 4402h BX = file handle for device "SMARTAAR" CX = number of bytes to read (min 28h) DS:DX -> buffer for status record (see #01447)
Return:
CF clear if successful AX = number of bytes actually read CF set on error AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note: NCache2 (from the Norton Utilities v8.0) attempts to support this interface, but does not do so correctly, often hanging the system; one should use the SmartDrive v4.x or NCache private interfaces (see INT 2F/AX=4A10h/BX=0000h,INT 2F/AX=FE00h/DI=4E55h)
See Also: AX=4403h"SMARTDRV" - INT 2F/AX=4A10h/BX=0000h
Format of SMARTDRV status record: Offset Size Description (Table 01447) 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 \ 14h WORD sectors already in cache > may be scaled rather than 16h WORD sectors already in track buffer / absolute counts 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
Category: Caches/Spoolers - Int 21h - S
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