SHELLHIGH tells FreeDOS what command shell to run.
SHELLHIGH is a CONFIG.SYS / FDCONFIG.SYS command.
drive The drive letter, e.g. C:
path The directory, e.g. \example\
filename The command shell to run. For example,
options These are passed to the command shell.
SHELLHIGH indicates the shell to use; often used to alter COMMAND.COM's
behavior. Note: it is command.com that processes AUTOEXEC.BAT; by using
the SHELL option, you can get command.com to process a differently named
file (such as FDAUTO.BAT for coexisting with another DOS using different
configuration options) or run a completely different command interpreter
such as 4DOS or a (unix) sh variant.
SHELLHIGH is like SHELL, except it attempts to load the command SHELL
(COMMAND.COM) into high memory first (failing that it should load it
in conventional memory).
Note: The order you load devices may have a large impact on amount
of free memory available. In general try to load large (in memory
usage) programs into high memory first.
Important: You should have a high memory manager such as (HIMEM),
HIMEMX or JEMMEX installed (prior device=himem.exe or device=himemx.exe
in CONFIG.SYS / FDCONFIG.SYS) before using this option.
SHELLHIGH is a command internal to kernel.sys and needs no other file
in order to work.
IN CONFIG.SYS / FDCONFIG.SYS:
shellhigh=C:\4DOS.COM /E:256 /P
shellhigh=C:\FDOS\bin\command.com C:\FDOS\bin /E:1024 /P=C:\fdauto.bat
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 © 1998 Jim Hall, updated 2011 by W. Spiegl.
This file is derived from the FreeDOS Spec Command HOWTO.
See the file H2Cpying for copying conditions.