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-
- DCACHE
- Command
-
- Douglas Boling
- 1988 No. 17 (Utilities)
-
-
- 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.
-