History of SeaBIOS releases. Please see Download for information on obtaining these releases.

SeaBIOS 1.7.3

Available on 20130707. Major changes in this release:

Initial support for using SeaBIOS as a UEFI Compatibility Support Module (CSM)
Support for detecting and using ACPI reboot ports.
By default, all 16bit entry points now use an internal stack to reduce stack footprint.
Floppy controller code has been rewritten to improve compatibility. Non-standard floppy sizes now work again with recent QEMU versions.
Several bug fixes and code cleanups

SeaBIOS 1.7.2

Available on 20130118. Major changes in this release:

Support for ICH9 host chipset ("q35") on emulators
Support for booting from LSI MegaRAID SAS controllers
Support for using the ACPI PM timer on emulators
Improved Geode VGA BIOS support.
Several bug fixes

SeaBIOS 1.7.1

Available on 20120831. Major changes in this release:

Initial support for booting from USB attached scsi (USB UAS) drives
USB EHCI 64bit controller support
USB MSC multi-LUN device support
Support for booting from LSI SCSI controllers on emulators
Support for booting from AMD PCscsi controllers on emulators
New PCI allocation code on emulators. Support 64bit PCI bars and mapping them above 4G.
Support for non-linear APIC ids on emulators.
Stack switching for 16bit real mode irq handlers to reduce stack footprint.
Support for custom storage in the memory at 0xc0000-0xf0000. No longer reserve memory for custom storage in first 640k.
Improved code generation for 16bit segment register loads
Boot code will now (by default) reboot after 60 seconds if no boot device found
CBFS and FWCFG "files" are now only scanned one time
Several bug fixes

SeaBIOS 1.7.0

Available on 20120414. Major changes in this release:

Many enhancements to VGA BIOS code - it should now be feature complete with LGPL vgabios.
Support for virtio-scsi.
Improved USB drive (usb-msc) support.
Several USB controller bug fixes and improvements.
Runtime ACPI AML PCI hotplug construction.
Support for running on i386 and i486 CPUs.
Enhancements to PCI init when running on emulators.
Several bug fixes

SeaBIOS 1.6.3

Available on 20111004. Major changes in this release:

Initial support for Xen
PCI init (on emulators) uses a two-phase initialization
Fixes for AHCI so it can work on real hardware. AHCI is now enabled by default.
Bootsplash support for BMP files
Several configuration options can now be configured at runtime via CBFS files

(eg, "etc/boot-menu-wait")

PCI device scan is cached during POST phase
Several bug fixes

SeaBIOS 0.6.2

Available on 20110228. Major changes in this release:

Setup code can relocate to high-memory to save space in c-f segments
Build now configured via Kconfig
Experimental support for AHCI controllers
Support for run-time configuration of the boot order (via CBFS/fw_cfg "bootorder" file)
Support T13 EDD3.0 spec
Improved bounds checking on PCI memory allocation
Several bug fixes

SeaBIOS 0.6.1

Available on 20100913. Major changes in this release:

Support for virtio drives
Add ACPI definitions for cpu hotplug support
Support for a graphical bootsplash screen
USB mouse support
The PCI support for emulators is less dependent on i440 chipset
New malloc implementation which improves memalign and free
The build system no longer double links objects
Several bug fixes

SeaBIOS 0.6.0

Available on 20100326. Major changes in this release:

USB hub support
USB drive booting support
USB keyboard auto-repeat support
USB EHCI controller support
Several improvements to compatibility of PS2 port handlers for old code
Support for qemu e820 interface
Several bug fixes and code cleanups

SeaBIOS 0.5.1

Available on 20100108. Major changes in this release:

Support for 32bit PCI BIOS calls
Support for int1589 calls
MPTable fixes for OpenBSD
ATA DMA and bus-mastering support
Several bug fixes and code cleanups

SeaBIOS 0.5.0

Available on 20091218. Major changes in this release:

Several enhancements ported from the Bochs BIOS derived code in qemu and kvm
Support for parallel hardware initialization to reduce bootup times
Enable PCI option rom support by default (Bochs users must now enable CONFIG_OPTIONROMS_DEPLOYED in src/config.h). Support added for extracting option roms from qemu "fw_cfg".
Support USB UHCI and OHCI controllers
Initial support for USB keyboards
SeaBIOS can now be greater than 64K
Support for permanent low memory allocations
APIC "local interrupts" now enabled in SeaBIOS (on emulators)
Several bug fixes and code cleanups

SeaBIOS 0.4.2

Available on 20090909. Major changes in this release:

Implement Post Memory Manager (PMM) support. Use equivalent "malloc" functions for internal allocations as well.
Refactor disk "block" interface for greater expandability
Support CBFS based floppy images
Allow boot menu to select either floppy to boot from
Increase ebda size to store a CDROM harddrive/floppy emulation buffer
Support systems with multiple vga cards (only the card with the legacy IO ranges mapped will have its option rom executed)
Make option rom memory be writable during option rom execution (on emulators)
Compile version number into code and report on each boot
Several bug fixes and code cleanups

SeaBIOS 0.4.1

Available on 20090714. Major changes in this release:

Support older versions of gcc that predate "-fwhole-program" (eg, v3.x)
Add initial port of "LGPL vga bios" code into tree in "vgasrc/" directory
Handle ATA drives still "spinning up" during SeaBIOS drive detect
Add support for option rom Boot Connection Vectors (BCV)
Enhance boot menu to support booting from any drive or any cdrom
Support flash based Coreboot File System (CBFS)
Support booting from a CBFS "payload"
Support coreboot table forwarder
Support compile time definitions for multiple root PCI buses
New tools/readserial.py tool
Several bug fixes and code cleanups

SeaBIOS 0.4.0

Available on 20090206. Major changes in this release:

Add Bios Boot Specification (BBS) calls; add PnP call stubs
Support option roms stored in PCI rom BAR
Support rebooting on ctrl+alt+delete key press
Scan PCI devices for ATA adapters (don't assume legacy ISA ATA ports are valid)
Attempt to automatically determine gcc capabilities/bugs during build
Add script to layout 16bit sections at fixed offsets and in compacted space
Introduce timestamp counter based delays
Support POST calls that are really a resume
Use new stack in EBDA for int13 disk calls to reduce stack usage
Support the EBDA being relocated by option roms
Move many variables from EBDA to global variables (stored in f-segment)
Support for PCI bridges when iterating through PCI device list
Initial port of several KVM specific features from their Bochs BIOS derived code
Access BDA using segment 0x40 and IVT using segment 0x00 (which could be important for 16bit protected mode callers)
Several bug fixes and code cleanups

SeaBIOS 0.3.0

Available on 20080817. Major changes in this release:

Run boot code (int18/19) in 32bit mode
Rewrite of PS2 port handling - new code is more compatible with real hardware
Initial support for int155f VGA option rom calls
Several bug fixes and code cleanups

SeaBIOS 0.2.3

Available on 20080702. Major changes in this release:

Initial support for running on real hardware with coreboot
Support parsing coreboot tables
Support relocating bios tables from high memory when running under coreboot
Dynamic e820 map generation
Serial debug support
New tools/checkstack.py tool
Several bug fixes and code cleanups

SeaBIOS 0.2.2

Formerly known as "legacybios". Available on 20080501. Major changes in this release:

Several bug fixes and code cleanups

SeaBIOS 0.2.1

Formerly known as "legacybios". Available on 20080406. Major changes in this release:

Port of boot menu code from Bochs BIOS
Several bug fixes and code cleanups

SeaBIOS 0.2.0

Formerly known as "legacybios". Available on 20080330. Major changes in this release:

Completion of initial port of Bochs BIOS code to gcc.

Releases

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