Workbench 4.0, version 52.1 (Kickstart version 52.2), U-Boot 1.1.1
Release date: December 24, 2006, visit the official website
Announcements: AmigaOS 4.0 (Classic)
Updates: July 18, 2007 | February 23, 2008 (Classic)
Kickstart on disk
Shipped with: Available as upgrade for AmigaOne and PPC-equipped A1200/4000
Major enhancements:

This is a non-exhaustive list of the new features of AmigaOS 4.0 The Final Update since Update #4:

  • Exec
    • New memory system.
      • Low Fragmentation, even with long uptimes.
      • Lots of speedups (for example, memory pools are 10 to 20 times faster than before).
      • Named memory.
    • Now uses the MMU to write-protect the .rodata sections of ELF binaries.
  • 680x0 emulators
    • Improved compatibility.
    • JIT emulator is between 10 to 50% faster.
  • DOS
    • 64-bit support for file sizes.
    • New directory scanning and object examination API.
  • Intuition
    • Support for legacy programs requiring a planar screen: normal, HAM6 and HAM8 planar screens are promoted to RTG.
    • Customizable truecolor mouse pointer (in hardware sprite mode on Radeon boards, and in software sprite mode on all boards).
    • Navigation of oversized screens via [Left Amiga] + numeric pad.
  • Workbench
    • Support for native 32-bit icons with normal and selected image.
    • Support for loader/saver modules for third-party icon formats.
    • Customizable highlight effect for selected single-image icons.
    • Customizable "left out", "no drop" and "disabled" icon symbols.
    • Removed the remaining 30 character filename length limits.
  • Storage controllers support
    • New driver for ITE IT8212 IDE controller.
    • New driver for SCSI 53C8xx-based controllers.
    • Support for IDE ct-flasher hardware added as contribution.
  • General
    • Support for alpha channel in IFF ILBM for easy loading, saving, and clipboard copy/paste of truecolor data.
    • No more black background in MultiView when displaying truecolor pictures with an alpha channel.
    • MultiView allows the Workbench screen to be closed and reopened.
    • Smoother appearance for colorwheel.gadget.
    • Customizable images for requester.class requesters.
    • Many parts of OS4 now support the mouse wheel.
  • ramdrive.device
    • The classic RAD: doesn't survive a soft reboot anymore.
    • The new RESRAD: survives a soft reboot again.
    • The new BOOTRAD: offers booting from a disk image which survives a soft reboot.
  • console.device
    • Changing the system default keymap now immediately affects all console windows which dont use a private keymap.
  • printer drivers
    • All printer drivers except Printers:File are PPC native.
    • The PostScript printer driver now supports printing pictures in greyscale, B&W and landscape modes. It now uses the current system default charset for text printing to ISO-8859-1 before.
  • Printer preferences editor
    • Now PPC native, some new features.
  • a1floppy.device
    • New driver for the AmigaOne which has a floppy disk port.
    • Supports booting from floppy disk.
    • Allows limited exchange with Classic Amigas.
  • ft2.library
    • Now supports algorithmic font emboldening.
  • Fonts
    • The default fonts are now the DejaVu fonts which support more different character sets than the Bitstream Vera fonts.
  • USB
    • USB mice and keyboards can now be used to access and navigate EarlyStartup.
    • Keyboard drivers respect user's keyboard key repeat delay and speed.
    • Keyboard drivers can now reset into UBoot.
  • Boot menu
    • Early boot menu can be used with only a keyboard.
    • Adjusts its GUI to the screen height which looks better on A1.
  • Picasso96 and drivers
    • Radeon Overlay (PIP) support.
    • Extended P96 PIP API (double/triple-buffering possibility allowing perfectly smooth animation).
  • AmiGS
    • Localized.
    • Improved printing preferences (page selection, double-sided printing, collation).
  • AmiPDF
    • Localized.
    • Improved printing preferences (page selection, double-sided printing, collation).
    • Additional character set support for bookmarks and text copying.
    • More search options.
  • Ghostscript
    • Updated to the latest version (8.54).
Screenshots:
Workbench 1Workbench 2Workbench 3Workbench 4
Boot ScreenBoot Menu 1Boot Menu 2
Hidden messages:
Media Information: One CD-ROM
Notes/comments: