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updated documentation of the memory options

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This commit is contained in:
Volker Ruppert 2013-02-24 21:06:26 +00:00
parent 8708d05bea
commit 70884d3cec
2 changed files with 57 additions and 15 deletions
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44
bochs/doc/docbook/user/user.dbk
View File

@ -2983,23 +2983,45 @@ This plugin currently must be loaded with plugin_ctrl: 'voodoo'.
</para>
</section>
<section id="bochsopt-megs"><title>megs</title>
<section id="bochsopt-memory"><title>memory</title>
<para>
Examples:
<screen>
memory: guest=512, host=256
</screen>
Set the amount of physical memory you want to emulate.
</para>
<para><command>guest</command></para>
<para>
Set amount of guest physical memory to emulate. The default is 32MB,
the maximum amount limited only by physical address space limitations.
</para>
<para><command>host</command></para>
<para>
Set amount of host memory you want to allocate for guest RAM emulation.
It is possible to allocate less memory than you want to emulate in guest
system. This will fake guest to see the non-existing memory. Once guest
system touches new memory block it will be dynamically taken from the
memory pool. You will be warned (by FATAL PANIC) in case guest already
used all allocated host memory and wants more.
</para>
<note><para>
Due to limitations in the host OS, Bochs fails to allocate more than 1024MB on most 32-bit systems.
In order to overcome this problem configure and build Bochs with <option>--enable-large-ramfile</option>
option.
</para></note>
</section>
<section><title>megs</title>
<para>
Examples:
<screen>
megs: 32
megs: 128
</screen>
Set the number of megabytes of physical memory you want to emulate. The default
is 32MB; most OS's won't need more than that. The maximum amount of memory
supported is 2048MB.
This option sets the 'guest' and 'host' memory parameters to the same
value. In all other cases the 'memory' option should be used instead.
</para>
<note><para>
Due to limitations in the host OS, Bochs fails to allocate more than 1024MB on most 32-bit systems.
In order to overcome this problem configure and build Bochs with <option>--enable-large-ramfile</option>
option.
</para></note>
</section>
<section id="bochsopt-cpu"><title>cpu</title>
@ -8691,7 +8713,7 @@ Known problems
the location of the downloaded ISO image in your <filename>bochsrc</filename>, and make Bochs boot
from it. Because Knoppix contains a graphical user interface, and has no other storage space but
the emulated RAM, it needs at least 128MB of it, see
<link linkend="bochsopt-megs">megs option</link>. Furthermore, you need to enable VBE support in
<link linkend="bochsopt-memory">megs option</link>. Furthermore, you need to enable VBE support in
Bochs (see <xref linkend="vesa-notes">).
</para>
</section>

28
bochs/doc/man/bochsrc.5
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@ -1,5 +1,5 @@
.\"Document Author: Timothy R. Butler - tbutler@uninetsolutions.com"
.TH bochsrc 5 "23 Feb 2013" "bochsrc" "The Bochs Project"
.TH bochsrc 5 "24 Feb 2013" "bochsrc" "The Bochs Project"
.\"SKIP_SECTION"
.SH NAME
bochsrc \- Configuration file for Bochs.
@ -378,11 +378,31 @@ This should be at most a forty-eight-character ASCII string.
Example:
cpuid: mmx=1, sep=1, sse=sse4_2, xapic=1, aes=1, movbe=1, xsave=1
.TP
.I "memory:"
Set the amount of physical memory you want to emulate.
guest:
Set amount of guest physical memory to emulate. The default is 32MB,
the maximum amount limited only by physical address space limitations.
host:
Set amount of host memory you want to allocate for guest RAM emulation.
It is possible to allocate less memory than you want to emulate in guest
system. This will fake guest to see the non-existing memory. Once guest
system touches new memory block it will be dynamically taken from the
memory pool. You will be warned (by FATAL PANIC) in case guest already
used all allocated host memory and wants more.
Example:
memory: guest=512, host=256
.TP
.I "megs:"
Set the number of Megabytes of physical memory you want to emulate.
The default is 32MB, most OS's won't need more than that.
The maximum amount of memory supported is 2048Mb.
The 'megs:' option sets the 'guest' and 'host' memory parameters to the same
value. In all other cases the 'memory' option should be used instead.
Example:
megs: 32