History of SeaBIOS releases. Please see [download](Download) for information on obtaining these releases. SeaBIOS 1.7.5 ============= Available on 20140528. Major changes in this release: * Support for obtaining SMBIOS tables directly from QEMU. * XHCI USB controller fixes for real hardware (now tested on several boards) * SeaVGABIOS improvements * New driver for "coreboot native vga" support * Improved detection of older x86emu versions with incorrect emulation. * Several bug fixes and code cleanups SeaBIOS 1.7.5.1 --------------- Available on 20141113. Stable release containing only bug fixes. SeaBIOS 1.7.5.2 --------------- Available on 20150112. Stable release containing only bug fixes. SeaBIOS 1.7.4 ============= Available on 20131223. Major changes in this release: * Support for obtaining ACPI tables directly from QEMU. * Initial support for XHCI USB controllers (initially for QEMU only). * Support for booting from "pvscsi" devices on QEMU. * Enhanced floppy driver - improved support for real hardware. * coreboot cbmem console support. * Optional support for using the 9-segment instead of the e-segment for local variables. * Improved internal timer code and accuracy. * SeaVGABIOS improvements * Better support for legacy X.org releases with incomplete x86emu emulation. * Support for using an internal stack to reduce caller's stack usage. * Back port of new "bochs dispi" interface video modes. * Several bug fixes and code cleanups * Source code separated out into additional hardware and firmware directories. * Update to latest version of Kconfig 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 1.7.2.1 --------------- Available on 20130227. Stable release containing only bug fixes. SeaBIOS 1.7.2.2 --------------- Available on 20130527. Stable release containing only 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 The SeaBIOS 1.6.3 release was an incremental feature release. The first release number (1) was incremented as the project was no longer in a beta stage, and the third release number (3) was also incremented to indicate the release was a regular feature release. SeaBIOS 1.6.3.1 --------------- Available on 20111124. Stable release containing only bug fixes. SeaBIOS 1.6.3.2 --------------- Available on 20120311. Stable release containing only 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 0.6.1.1 --------------- Available on 20101031. Stable release containing only bug fixes. SeaBIOS 0.6.1.2 --------------- Available on 20101113. Stable release containing only bug fixes. SeaBIOS 0.6.1.3 --------------- Available on 20101226. Stable release containing only 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.