Dec 052017
PC Magazine, Volume 7, Number 17 Files.
File VOL7N17.ZIP from The Programmer’s Corner in
Category Files from Magazines
PC Magazine, Volume 7, Number 17 Files.
File Name File Size Zip Size Zip Type
DCACHE.ASM 55450 10258 deflated
DCACHE.BAS 10901 3392 deflated
DCACHE.COM 1998 1617 deflated
DCACHE.DOC 2036 1073 deflated
DO.BAT 1281 533 deflated
ENV717.ARC 3172 3114 deflated
INSTALL.BAT 254 184 deflated
MCOPY.BAT 429 230 deflated
NEWVAL.EXE 29526 19508 deflated
NEWVAL.FOR 307 161 deflated
PP717.ARC 15635 15274 deflated

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Contents of the DCACHE.DOC file


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

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.

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