XDMA.SYS is a DOS driver for UltraDMA hard-disks.
XDMA.SYS has to be loaded in CONFIG.SYS / FDCONFIG.SYS.
When FreeDOS is already running, you can load XDMA.SYS later
with DEVLOAD .
DEVICE[HIGH] = [path]XDMA.SYS [/O] [/L] [/Q]
/O Enables output overlap.
/L Limits DMA to "low memory" below 640K. /L is REQUIRED to use
UMBPCI or similar drivers whose upper-memory areas cannot do
DMA. If /L is given, the driver must be in LOW memory (I/O
command lists use DMA), or driver loading ABORTS! /L makes
the driver use its "local buffer" for I/O of data past 640K.
/Q Suppresses the "beep" on output-overlap errors ("quiet" mode).
For all switches, a dash may replace the slash, and a lower-case letter
may be used.
XDMA.SYS is a DOS driver for UltraDMA hard-disks. It supports normal
"end user" PC mainboards having an Intel, VIA, SiS, ALi, or similar
UltraDMA controller set by the BIOS in "Legacy IDE mode". XDMA does NOT
handle Serial-ATA, "Native PCI mode" servers or "add-on" adapter cards
made by Promise, SiiG, etc. XDMA.SYS runs normal mainboard IDE chips and
AVOIDS a need for an "add-on" card!
XDMA.SYS handles up to 4 UltraDMA disks of any size, including newer
models over 128 gigabytes of storage.
An XMS manager, HIMEMX or JEMMEX or similar, and 128K of XMS
memory are also required, so XDMA can allocate a "local buffer".
Please read this command's lsm file also.
You will find the updated version (internet) here and
the version described in this manual page here.
The lsm file contains information about the name of the programmer,
the download site, and some other command related information.
Copyright © 2007 Jack Ellis, updated 2008 by W. Spiegl.
This file is derived from the FreeDOS Spec Command HOWTO.
See the file H2Cpying for copying conditions.