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-
- DCACHE Douglas Boling
-
- Purpose: A memory-resident hard disk cache that speeds disk Input/Output by
- holding recently-accessed data in RAM, where it can be more quickly
- retrieved than by being read again from the hard disk.
-
- Format: DCACHE [/OFF | /ON] [/U] [/Mx] [/E] [/Hx]
-
- Remarks: When entered without any of its optional parameters, DCACHE installs
- and activates itself as a 64KB conventional (DOS) memory cache for
- the primary hard disk drive in the system. The size of the cache, in
- kilobytes, can be varied by inclusion of the /Mx parameter, where x
- may be any one of the following values: 16, 32, 64, 128, 256, 512,
- 1024, 2048, 4096, or 8192. Expanded memory that conforms to the
- Lotus/Intel/Microsoft Expanded Memory specification can be used in
- place of regular DOS memory by loading DCACHE with the optional /E
- parameter.
-
- The /Hx parameter specifies which of two physical hard disks are to
- be cached: /H0 is the default primary drive and /H1 is the secondary
- drive. Note that a hard disk that is logically partitioned into
- several smaller drives is considered as a single drive by DCACHE.
- DCACHE cannot be set to cache floppy disk drives, but this need can
- be met by entering the BUFFERS=3 command as a line in the system's
- CONFIG.SYS.
-
- After DCACHE has been installed, caching may be disabled or
- re-enabled by issuing the DCACHE /OFF or DCACHE /ON commands. DCACHE
- /U uninstalls the program from memory if no subsequent
- terminate-stay-resident program has been loaded and if BIOS interrupt
- 13h has not been changed since DCACHE was installed.
-
- DCACHE may be executed either from the DOS prompt or as a line in an
- AUTOEXEC.BAT file. The DCACHE syntax may be reviewed by entering
- DCACHE ? before or after loading the program. In the latter case,
- only the /OFF, /ON, and /U options will be displayed. In addition to
- the memory reserved for the
- cache itself, DCACHE occupies approximately 1,200 bytes of RAM.
-