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Novell NLCACHE,NWCACHE - INSTALLATION CHECK

AX = D8C0h

Return:
AL = FFh if installed
CL = memory type (01h NLCACHEC, 02h NLCACHEX, 03h NLCACHEM)
DH = major version (01h for v1.1)
DL = minor version (01h for v1.1)
ES:DI -> private API entry point (see #03091)

Program: NWCACHE is the disk cache included with Personal NetWare, Novell DOS 7, Caldera OpenDOS 7.01, DR-OpenDOS 7.02, DR-DOS 7.02, and Caldera Thin Clients/Lineo DR-DOS 7.03.

Note: This function is called by the NetWare Lite and Personal NetWare SERVER. It may also be called by future (post DR-DOS 7.03) COMMAND.COM before it returns to the prompt.

BUG: Some pre-BETA 17 (1993/09/28) versions of NWCACHE returned -1,0,1 instead of 1,2,3 for the memory type in CL.

See Also: AX=D800h - AX=D880h

(Table 03091)
Call NLCACHE/NWCACHE "sideband function" API entry point with:.
BX = function
0000h flush request from server
Return:
CF clear if successful at flushing deferred writes
AX = 0000h
CF set on error
AX = error code
0001h (NWCACHE only) get cache statistics
ES:DI -> buffer for statistics (see #04122)
Return:
CF clear if successful
AX = 0000h
ES:DI buffer filled
other
Return:
CF set
AX = 0001h (invalid function)

Format of NWCACHE cache statistics:

Offset  Size    Description     (Table 04122)
00h    WORD    version
02h    BYTE    memory type
03h    WORD    initial cache size in KB
05h    WORD    current cache size in KB
07h    DWORD   number of read requests
0Bh    DWORD   number of physical reads performed
0Fh    DWORD   number of write requests
13h    DWORD   number of physical writes performed
17h    BYTE    delay ticks for deferred write (0 if no deferral)
18h    WORD    maximum number of sectors in lookahead buffer
1Ah    WORD    number of disk errors
1Ch    WORD    number of cache memory errors

See Also: #03091

Category: Disk I/O Enhancements - Int 2Fh - N

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