Dec 312017
 
Adjustable ramdisk for use in EMS memory.
File XPANDISK.ZIP from The Programmer’s Corner in
Category Utilities for DOS and Windows Machines
Adjustable ramdisk for use in EMS memory.
File Name File Size Zip Size Zip Type
XPANBOSS.ASM 5889 1740 deflated
XPANBOSS.BAS 5328 1707 deflated
XPANBOSS.COM 886 630 deflated
XPANDISK.ASM 38309 8108 deflated
XPANDISK.BAS 10335 3170 deflated
XPANDISK.DOC 2397 1098 deflated
XPANDISK.SYS 1876 1447 deflated

Download File XPANDISK.ZIP Here

Contents of the XPANDISK.DOC file



XPANDISK.SYS and XPANBOSS
Device Driver and Command

Michael J. Mefford
1988 No. 18 (Utilities)


Purpose: Permits varying the amount of expanded memory allocated to
a RAM disk without rebooting, when used on systems equipped with memory
that conforms to the Lotus/Intel/Microsoft specification.

Format: In CONFIG.SYS file:

DEVICE=XPANDISK.SYS [/Dn][/Sn][/En][/Mn][/An]

At DOS command prompt:

XPANBOSS [d:][/Dn][/Sn][/En][/Wn][/Rn][/Mn][/An]

Remarks: XPANDISK makes use of an Expanded Memory Manager. The
DEVICE=XPANDISK.SYS entry must, therefore, follow the DEVICE=EMM.SYS
(driver name will differ with manufacturer) line already in the
CONFIG.SYS file. XPANBOSS varies the parameters of the RAMdisk d:
created by XPANDISK. Note that while this does not require rebooting,
changing parameters other than /R (Read-Only) does reformat d:, whose
contents are thereby lost. A confirmation warning is given to allow
saving the RAMdisk files before the reformatting. The optional switch
parameters for XPANDISK.SYS and XPANBOSS.COM are as follows:

/Dn Disk size, variable from 16K to 32,768K; default 64K.
/Sn Sector size, 128, 256, or 512 bytes; default 265 bytes.
/En Number of RAMdisk root directory entries; default 64.
/Mn Minimizes RAMdisk size (to 16K); use when running
large spreadsheets or databases.
/An Expands RAMdisk to fill all extended memory.
/Wn Eliminates warning that changing RAMdisk
parameters loses contents; use in batch file operation.
/Rn Make RAMdisk read-only; use after loading possible
Trojan horse programs. RAMdisk d: may be returned
to read-write by entering d:XPANBOSS.

Note: DOS assigns the next available drive letter as d:. Be sure
that this does not cause a conflict if you are using a SUBST drive.

Note: XPANDISK and XPANBOSS allow the same parameter comments
permitted by the VDISK.SYS extended/conventional device driver. Thus,
for example, you could enter

DEVICE=XPANDISK.SYS /disk size=120K /sector=128

and DOS would understand this as

DEVICE=XPANDISK.SYS /D120/S128


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