Command: hiram

  HIRAM binds available RAM areas (ausiliary memory cards, shadow-RAM,
  etc.) between the Segments A000h and F000h into Upeer memory.

Syntax:

  Use HIRAM in CONFIG.SYS / FDCONFIG.SYS:
  device=[drive:] [\path\]hiram.exe [/option [/option [...]]]

Options:

    Debug      Prevent installation and shows only memory information.
    Exclude=start-end[,start-end]  Leave a range out of the RAM-Test.
    FixMSDOS   Initialize auxiliary memory in the MS-DOS 5.0 manner.
    FixDRDOS   Initialize auxiliary memory in the DR-DOS 5.0/6.0 manner.
    Chain      Connects conventional and auxiliary memory.
    NoChain    Load conventional and auxiliary memory separately.
    Int2F      Installs the Int 2Fh handler for MS-DOS/DR-DOS.
    NoInt2F    Prevents the installation of the Int 2Fh handlers.
  [Presets]
    MS-DOS 3.x - 4.0x:  /FixMSDOS /Chain /NoInt2F,
    MS-DOS 5.x:         /FixMSDOS /NoChain /Int2F,
    DR-DOS 3.41:        /FixMSDOS /Chain /NoInt2F,
    DR-DOS 5.0 - 6.0:   /FixDRDOS /Chain /Int2F

Comments:

  The range between the segments A000h and F000h is designed for ISA/PCI/
  AGP extension/add-on cards since the release of version 5.0 of DR-DOS
  and MS-DOS, which allows UMA (Upper Memory Area) to be used.
  This way the free conventional DOS memory can be increased up to ˜
  620 KB. HIRAM supports UMA on PCs with 8086/88 or 80286 processors and
  memory between the segments A000h and E000h (inclusively). On PCs with
  386/486 and Shadow RAM within the above mentioned area, HIRAM can also
  be used, even without EMM386 and its V86 (Virtual) Mode UMBs.
  Device drivers can be loaded high with DEVICEHIGH / INSTALLHIGH in
  CONFIG.SYS / FDCONFIG.SYS or LOADHIGH in AUTOEXEC.BAT / FDAUTO.BAT

  The table below shows the output of MEM (DR-DOS 6.0) on a AT/286 with
  640 KB RAM and 64 KB auxiliary RAM in the segment E000h after using
  HIRAM.EXE:

  Memory type   (KBytes)        Available
  ----------------------------------------------
  Conventional  655.360 (640K)  643.040 (627K)
  Upper memory   65.488 (63K)       288 (0K)

  Since the use of the UMA differs clearly with the DOS versions, HIRAM
  adjusts automatically to the used version. Optional parameters should
  be used only for special configurations or in the case of errors.

  For more informations see:
  https://gitlab.com/FreeDOS/drivers/hiram/-/tree/master/DRIVERS/HIRAM
  OR:
  C:\FREEDOS\DRIVERS\HIRAM\HIRAM.TXT

Examples:

  Usage may differ depending on used DOS versions and/or particular
  hardware requirements:
  - MS-DOS starting from version 5, 8086/88 or 80286 without Extended
  MEMORY, but with auxiliary memory.

  CONFIG.SYS                  AUTOEXEC.BAT / FDAUTO.BAT
  --------------------------------------------------------
  DOS=UMB                     C:\HIRAM\HIFILES=12
  DEVICE=C:\HIRAM\HIRAM.EXE   LH KEYB GR,,KEYBOARD.SYS
  FILES=8                    ...
  DEVICEHIGH=...

  - MS-DOS starting from version 5, 80286 with Extended MEMORY, 80386/486
  with Shadow RAM.
  DEVICE drivers and TSR programs load into the UMA, but the OS kernel
  does not.

  CONFIG.SYS                  AUTOEXEC.BAT
  --------------------------------------------------------
  DOS=HIGH,UMB                C:\HIRAM\HIFILES=12
  DEVICE=C:\HIRAM\HiRAM.EXE   LH KEYB GR,,KEYBOARD.SYS
  FILES=8                     ...
  DEVICEHIGH=HIMEM.SYS
...

  DEVICE drivers and TSR programs load into the UMA, but the OS kernel
  does not.
  - DR-DOS starting from version 5, 8086/88 or 80286 without Extended
  MEMORY, but with auxiliary memory.

  CONFIG.SYS                  AUTOEXEC.BAT
  ---------------------------------------------------------
  HIDOS=ON                    MEMMAX +U
  SHELL=COMMAND.COM /P /MU    C:\HIRAM\HIFILES=15
  DEVICE=C:\HIRAM\HiRAM.EXE   KEYB GR,,KEYBOARD.SYS /MU
  FILES=5                     HILOAD ...
  HIBUFFERS=...
  HIDEVICE=...

  DEVICE drivers, TSR programs and the OS kernel load into the UMA.
  - DR-DOS starting from version 5, 80286 with Extended MEMORY, 80386/486
  with Shadow RAM.

  CONFIG.SYS                  AUTOEXEC.BAT
  ---------------------------------------------------------
  HIDOS=ON                    MEMMAX +U
  SHELL=COMMAND.COM /P /MH    C:\HIRAM\HiFILES=15
  DEVICE=HIDOS.SYS /BDOS=FFFF KEYB GR,,KEYBOARD.SYS /MH
  DEVICE=C:\HIRAM\HiRAM.EXE   HILOAD ...
  FILES=5
  HIBUFFERS=...
  HIDEVICE=...

  DEVICE drivers and TSR programs load into the UMA, but the OS kernel
  is shifted into the HMA.
  HIRAM tests the upper memory in 4 KB steps for the presence of upper
  RAM and initializes it if necessary.
  HIRAM does not occupy additional memory after successful initialization
  if using DR-DOS 3.41 and MS-DOS. If using DR-DOS 5.0 or 6.0 only 48
  Bytes load in the UMA.

Command: hiram

Syntax:

Options:

Comments:

Examples:

See also: