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authorMatt Fleming <matt.fleming@intel.com>2012-12-06 10:13:41 +0000
committerMatt Fleming <matt.fleming@intel.com>2012-12-06 10:47:31 +0000
commitddb10ce99c327888ade4d2ba3e4c50ad12aaa059 (patch)
treeb9f0cbe427b4a4d8441857990fd4410ee4635676 /man
parente4b3ce2dd82ce2da85c37fd3f332ec2eb802b734 (diff)
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Delete 16-bit COMBOOT supportsyslinux-5.00
16-bit COMBOOT files are no longer supported by Syslinux in 5.00 so delete all references and change any 32-bit COMBOOT image references to mention ELF instead. Some of the COMBOOT stuff is still used internally so we can't nuke core/comboot.inc yet, but that will disappear in a future release. Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'man')
-rw-r--r--man/syslinux.138
1 files changed, 5 insertions, 33 deletions
diff --git a/man/syslinux.1 b/man/syslinux.1
index af44979b..adcaf94d 100644
--- a/man/syslinux.1
+++ b/man/syslinux.1
@@ -141,8 +141,7 @@ and if no "append" is given the default is to use the global entry (if any).
Use "append -" to use no options at all. Up to 128 "label" entries are
permitted.
.IP
-The "image" doesn't have to be a Linux kernel; it can be a boot sector or a
-COMBOOT file (see below.)
+The "image" doesn't have to be a Linux kernel; it can be a boot sector (see below.)
.RE
.TP
.BI implicit\ flag_val
@@ -297,25 +296,21 @@ For example:
.TP
\fI<SUB>\fP = \fI<Ctrl-Z>\fP = ASCII 26
End of file (DOS convention).
-.SS Comboot Images and other operating systems
+.SS Other operating systems
This version of \fBsyslinux\fP supports chain loading of other operating
-systems (such as MS-DOS and its derivatives, including Windows 95/98),
-as well as COMBOOT-style standalone executables (a subset of DOS .COM
-files; see separate section below.)
+systems (such as MS-DOS and its derivatives, including Windows 95/98).
.PP
Chain loading requires the boot sector of the foreign operating system
to be stored in a file in the root directory of the filesystem.
-Because neither Linux kernels, boot sector images, nor COMBOOT files
-have reliable magic numbers, \fBsyslinux\fP will look at the file
+Because neither Linux kernels, nor boot sector images have reliable magic
+numbers, \fBsyslinux\fP will look at the file
extension. The following extensions are recognised:
.PP
.nf
.ta \w'none or other 'u
none or other Linux kernel image
-CBT COMBOOT image (not runnable from DOS)
BSS Boot sector (DOS superblock will be patched in)
BS Boot sector
-COM COMBOOT image (runnable from DOS)
.fi
.PP
For filenames given on the command line, \fBsyslinux\fP will search for the
@@ -323,29 +318,6 @@ file by adding extensions in the order listed above if the plain
filename is not found. Filenames in KERNEL statements must be fully
qualified.
.PP
-A COMBOOT file is a standalone executable in DOS .COM format. They
-can, among other things, be produced by the Etherboot package by
-Markus Gutschke and Ken Yap. The following requirements apply for
-these files to be sufficiently "standalone" for \fBsyslinux\fP to be able to
-load and run them:
-.IP \(bu
-The program must not execute any DOS calls (since there is no
-DOS), although it may call the BIOS. The only exception is that
-the program may execute INT 20h (Terminate Program) to return to
-the \fBsyslinux\fP prompt. Note especially that INT 21h AH=4Ch, INT 21h
-AH=31h or INT 27h are not supported.
-.IP \(bu
-Only the fields pspInt20 at offset 00h, pspNextParagraph at offset 02h and
-pspCommandTail at offset 80h (contains the arguments from the \fBsyslinux\fP command
-line) in the PSP are supported. All other fields will contain zero.
-.IP \(bu
-The program must not modify any main memory outside its 64K segment if it
-returns to \fBsyslinux\fP via INT 20h.
-.PP
-\fBSyslinux\fP currently doesn't provide any form of API for the use of
-COMBOOT files. If there is need, a future version may contain an INT
-interface to some \fBsyslinux\fP functions; please contact me if you have a
-need or ideas for such an API.
.SS Novice protection
\fBSyslinux\fP will attempt to detect if the user is trying to boot on a 286
or lower class machine, or a machine with less than 608K of low ("DOS")