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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

UI mode

The new UI directive allows a more natural way to specify a menu system (or not.) With the UI directive specifying the menu system, the DEFAULT directive can be used to select the default entry inside the menus.

Prior to that release, the syntax was :

  DEFAULT menu.c32

Now, you can do:

  UI menu.c32


kbdmap com32 module

This new module allows to load dynamically a new keyboard map, read-only shell

Syntax: kbdmap <key_map>


Directory functions

Add calls for directory functions; Implement most only for FAT (SYSLINUX).

Uses INT 22h AX= 001Fh, 0020h, 0021h and 0022h to prepare for the COM32 C functions getcwd(), opendir(), readdir(), and closedir(), respectively.

INT22h, AX=001Fh will return a valid value for all variants. INT22h, AX= 0020h, 0021h, and 0022h are only implemented for SYSLINUX while other variants will call comapi_err for these 3.


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.

commit:;a=commit;h=53daea0916af7b874f830bd0428da2be4e1bc3b3 URL:

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

commit:;a=commit;h=3fba9b8036423fc7a25a8c43e5d136b4f7ceadbc URL:

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.



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