Command: UDVD2.SYS

  UDVD2 is a CD/DVD driver for up to 4 SATA, IDE, or old PIO-mode drives.
  It reads CD/DVD data files, plays audio CDs, and can read "raw" (track-
  writer) data. UDVD2 can work alone; or if the caching UHDD is in use,
  UDVD2 calls it to cache CD/DVD data files and directories (audio/track-
  writing is uncached). UDVD2 takes 128K of XMS as its buffer for input
  unsuited to UltraDMA. It shares UHDD's buffer, or it will set its own
  buffer if UHDD is unused.

Syntax:

  DEVICE[HIGH] = [path] UDVD2.SYS [/A] [/D:DeviceName] [/H] [/Rnn][/UX]

Options:

  UDVD2 usually needs only a /H switch to use "free HMA" and a /D: switch
  to set its "device name" for SHSUCDX / (MSCDEX). All UDVD2 switches are:
  /A     See /A for UHDD.
  /D:    Specifies the "device name" used by the CD/DVD Redirector to
         access CD/DVD drives, e.g. /D:CDROM1 /D:SANYO1 etc.
         If /D: is omitted, or the name following a /D: is missing
         or invalid, UDVD1 is set by default.
  /H     See /H for UHDD, above.
  /Rnn   See /R for UHDD, above.
  /UX    Disables all CD/DVD UltraDMA, even for units that can do it.
         All CD/DVD data input then uses PIO-mode. /UX is rarely
         needed, only for odd drives that do not obey ATAPI rules.

Comments:

  For all switches in each driver, a dash may replace the slash and lower
  case letters may be used if desired.
  UHDD and UDVD2 are Closed-Source DOS drivers for PCs with an 80386+
  CPU (UHDD requires an 80486+ CPU) and using MS-DOS V5.0+ or a
  fully compatible variant.
  The latest UHDD and UDVD2 are Open Source device drivers for PCs with
  an 80386+ CPU and using FreeDOS, whereas at XMGR, RDISK it depends on
  the version number if it is Open Source or Closed Source.
  For more information and if you are in doubt, read "README.txt" in
  "drivers.zip".

Examples:

  Comment: There are new closed source drivers for UHDD.SYS (=XHDD.SYS)
  and UVD2.SYS (=XDVD2.SYS) which may have other options. So please do
  not rely on the options in the examples!
  A) A small real-mode system that needs only XMS may use this
    CONFIG.SYS/FDCONFIG.SYS example file:
       ..
       ..
     DOS=HIGH
     DEVICE=C:\BIN\XMGR.SYS /Rnn              ;R if DOS "games" need it
       ..
       ..  Int 13h drivers cached by UHDD load now.
       ..
     DEVICE=C:\BIN\UHDD.SYS /S20 /H /O        ;Min. 20 MB recommended
     DEVICE=C:\BIN\UDVD2.SYS /D:BLURAY1 /H    ;Must load after UHDD
     DEVICE=C:\BIN\RDISK.COM /S5 /F           ;Optional. If not used,
                                              ; UHDD/UDVD2 can issue /F
       ..
       ..  Further CONFIG.SYS commands can be given here.
       ..
  B) Real-mode systems with V3.70+ UMBPCI and XMGR do not need the LOWDMA
     driver, as XMGR has an "I-O Catcher" for UMBPCI. This scheme takes
     NO low memory if /W can be used (MS-DOS etc.) or only 544 low memory
     bytes without /W (PC-DOS etc.). XMGR and other drivers load direct
     to UMBPCI "Shadow RAM"! Systems which permit multiple providers of
     upper memory (MS-DOS, PC-DOS, etc.) can also load an "EMM" driver as
     shown below, to map the B000-B7FFh "Monochrome Graphics" area as 32K
     more upper memory. For more SERIOUS protected-mode notes, please
     READ Section 6 below! An example CONFIG.SYS file is:
       ..
       ..
     DOS=HIGH,UMB
     DEVICE=C:\BIN\UMBPCI.SYS
     DEVICE=C:\BIN\XMGR.SYS /W /Rnn            ;W only when permitted!
                                               ;R <= 15.5 MB with JEMM!
     DEVICE=C:\BIN\JEMM386.EXE I=B000-B7FF X=C800-EFFF ...   ;Optional
       ..
       ..  Int 13h drivers cached via UHDD load now
       ..  and can be loaded in UMBPCI upper memory.
       ..
     DEVICEHIGH=C:\BIN\UHDD.SYS /S200 /H /O    ;Fast 200 MB cache
     DEVICEHIGH=C:\BIN\UDVD2.SYS /D:CDROM1 /H  ;Must load after UHDD
     DEVICEHIGH=C:\BIN\RDISK.COM /S50 /F       ;Optional. If unused,
                                               ; UHDD/UDVD2 can issue /F
       ..
       ..  Further CONFIG.SYS commands can be given here.
       ..
  C) A protected-mode system with XMGR and an "EMM" driver can use XMGR's
     "boot", taking a minimum 304 bytes of low memory for a 24-entry "XMS
     Handles" table, plus any low memory the "EMM" driver may need. For
     more SERIOUS protected-mode notes, please READ Section 6 below! A
     CONFIG.SYS example file is:
       ..
       ..
     DOS=HIGH,UMB
     DEVICE=C:\BIN\XMGR.SYS /B /N24 /R15.5     ;24 Handle XMGR "boot"
                                               ;R <= 15.5 MB with JEMM!
     DEVICE=C:\BIN\JEMM386.EXE I=B000-B7FF ...
     DEVICEHIGH=C:\BIN\XMGR.SYS                ;Loads the runtime XMGR
       ..
       ..  Int 13h drivers cached by UHDD load
       ..  now and can load into upper memory.
       ..
     DEVICEHIGH=C:\BIN\UHDD.SYS /S400 /H /O /P ;Optimal 400 MB cache
     DEVICEHIGH=C:\BIN\UDVD2.SYS /D:MYDVD /H   ;Must load after UHDD
     DEVICEHIGH=C:\BIN\RDISK.COM /S125 /F      ;Optional. If unused,
                                               ; UHDD/UDVD2 can issue /F
       ..
       ..  Further CONFIG.SYS commands can be given here.
       ..
  In each example above, UDVD2 must load after UHDD, so UDVD2 will "find"
  UHDD in memory and call it for CD/DVD file caching.

  Users that need RDISK with a specific drive letter may delay loading it
  until AUTOEXEC.BAT is run. If /F or /G are also needed for DOS games,
  RDISK must issue them from AUTOEXEC, since it is then the last of these
  drivers to load. Whenever RDISK is used, AUTOEXEC.BAT must also issue
  commands to copy all RDISK programs and data up to the RAM-disk, as XMS
  memory is LOST when PCs shut down! Such copies require little time.

  If UHDD and RDISK will both run, users must balance how much XMS memory
  the drivers take. UHDD can set a 400-MB cache, as in example C above,
  and RDISK can request 125-MB of XMS for its programs, "fast" data files
  and compiler TEMP files. Such sizes should be optimal on most systems
  but can be adjusted up or down, as desired. All remaining XMS memory
  is left free for use by other programs. The basic "plan" is for RDISK
  to hold programs and high-speed files, while UHDD then caches "regular"
  data files. Properly balanced use of XMS memory will give a VERY fast
  DOS system!

Command: UDVD2.SYS

Syntax:

Options:

Comments:

Examples:

See also: