From Syslinux Wiki
Revision as of 20:42, 3 April 2009 by Pierre (talk | contribs) (Directory functions)

Jump to: navigation, search

Syslinux 3.74 was released on <date>

Summary: This new release adds: UI mode, dynamic keyboard mapping, Add calls for directory functions, documentations updates, GPXE 0.9.7, Simple command module, cpuid updates, Hardware Detection Tool, PCI improvements, memdisk improvements, shuffler improvements, quiet mode, memory hole support & many bugfixes

UI mode

The configuration files syntax supports a new UI directive to specify a menu system. The DEFAULT directive can be used to select the default entry inside the menu.

Prior to that release, the syntax was:

  DEFAULT menu.c32

Now, you can do:

  UI menu.c32

In the previous example, if Linux points into a submenu, that menu becomes the start menu; in other words, this directive has the same effect as both MENU DEFAULT and MENU START.

For backwards compatibility with earlier versions of Syslinux, this directive is ignored unless the configuration file also contains a UI directive.


New module: kbdmap.c32

This new module can be used to load dynamically a new keyboard map.


   kbdmap.c32 <key_map>


Directory functions

COMBOOT API extended with calls for directory functions.


   INT 22h AX=001Fh ; getcwd()
   INT 22h AX=0020h ; opendir()
   INT 22h AX=0021h ; readdir()
   INT 22h AX=0022h ; closedir()

Note: getcwd() is compatible with all variants of Syslinux, whereas the other calls are only implemented for SYSLINUX (FAT). They will call comapi_err if used with another variant.


Read-Only Shell (ROSH)

ROSH is designed to make exploring the contents of a file system/disk possible from the Syslinux environment. Primarily, it is geared towards the disk-based variants as TFTP currently does not have any standardized method for retrieving a directory listing.

The internal commands currently implemented include help, man, ls, dir, more, cd, pwd, run, quit and exit.



Simple command module

A simple "cmd" COM32 module, which only echoes a CLI command. This is mostly useful when running on an alternate CLI, e.g. on top of the native gPXE COMBOOT interface.


CPUID updates

Updating the dmi code to detect the most recent CPUs=


Hardware Detection Tool

HDT (stands for "Hardware Detection Tool") is a Syslinux com32 module designed to display low-level information for any x86 compatible system.

HDT can inspect multiple subsystems: CPU (via cpuid), PCI, DMI ( Memory modules, BIOS, Motherboard, IPMI base board, Chassis, Batteries, CPU),

Disks (work in progress), Syslinux, Linux Kernel modules needed, PXE environment, VESA modes



PCI improvements

PCI devices now reports their categories like "IDE interface", "Ethernet controller", ... The resulting strings are found in the pci.ids file.


PCI devices can reports multiple kernel modules for a single device.


Memdisk improvements

If a "large floppy" image is formatted with a FAT filesystem, we can use the headers in the FAT image to derive the geometry.


Shuffler Improvements

In some cases, the shuffling code was unable to manage hudge files preventing system to boot.


Quiet mode

Suppress the Loading... prompt if "quiet" is specified on the command line.


Memory hole management

Prior to that release, if we found a memory hole, we simply don't use the memory beyond that point. This makes it possible for com32 modules to use that memory. After this, we should be able to add relocation support to allow loading when the memory at 1 MB is unavailable.



The Syslinux project thanks contributors that made this new release existing : Hans Peter Anvin, Gene Cumm, Vincente Jimenez Aguilar, Sebastian Herbszt, Michael Brown, Shao Miller, Pierre-Alexandre Meyer, Erwan Velu and all pre-release testers.