Emulator IV, EOS

Overview The Emulator Operating System (EOS) did moved on leaps and bounds over the years. Here is a complete guide to all the versions, if possible upgrade to 4.10.

Version 4.7  “FAT” This software is the latest and was only released as a beta version. The and he major feature in this upgrade is the EOS FAT file system. EOS FAT is based on the FAT32 disk file system as used by Microsoft™ corporation and others. In addition, EOS FAT makes it much easier export files as .wav or .aiff and transfer files from your E4 and your PC or Mac.


Version 4.6 New Features in the EOS version 4.6 enable import Ensoniq ASR-10 and EPS sounds from CD or floppy.

EOS 4.62 ink Flash prep

Version 4.5  “R-Chip” This software was pre-announced in October 1999 when E-mu Systems released early details of the R-chip 32 bit FX processor card. This card and EOS 4.5 was debuted in a low key session at Winter NAMM 2000. It should ship in fall 2000, probably only with the new FX card. We will post more details on EOS 4.5 when we get them. For now you can read all about the R-Chip to get an idea of what EOS 4.5 is going to contain.

Beat Munging 2.0 will also be included, as well as a bug fix to EOS on the scrub wheel.

Version 4.10 “Proteus PROM” This release was launched in Spring 2000, and it provides support for creating Flash ROM’s for the Proteus 1000 and 2000 range. Features include:

  • Proteus Flash PROM creation
  • A fix for DVD RAM Drive support
  • Support for the  Orb Drives is complete
  • Sample transfers via SMIDI are fixed so that they have 4 sample loop offsets
  • Sample import problems that occur when EOS swaps sides on a stereo sample on certain SMIDI transfers are fixed

EOS 4.10 Classic

Version 4.02 “Bug Fix” This late 1999 release fixes bugs in release 4.01.

Version 4.01 “Ultracize” This release takes the Emulator 4 range up to Ultra software status with lots of new features. For non-Ultra samplers it is called “Classic”. EOS 4.xx is provided with all Ultra samplers.

  • Faster Loading and Saving
  • Support for Importing EMU ESI4000 Samples via SCSI
  • Ability to Import Akai S-3000 Format Banks
  • Improved Akai S-1000 Sample Library Support. All four layers are now read.
  • Reads and Writes .WAV and AIFF Files via Floppy Drive
  • Supports up to 18 GB Hard Drives
  • Hard Drive Sleep Mode (to sleep noisy hard drives)
  • 2 New DSP Tools (Bit Convert and Phase Linear Filter)
  • 6 Additional Patchcords per Voice
  • New LFO Waveforms
  • Better PC Compatibility via SCSI
  • Support for the ADAT I/O
  • Improved MIDI Response Time
  • Improved Looping Capabilities
  • Improvements to the Sequencer PC/Mac based preset editing

Version 3.0  “Workstation” A major new release announced on December 15th, 1997. It provides:

  • Upgrades the on-board sequencer to 48 tracks
  • Adds an arpeggiator
  • Allows for MIDI synchronised LFO`s and envelopes
  • Introduces patch cord architecture
  • Ships with Emagic EOS Sound Diver for

EOS 3.0b

Version 2.8  “Esynth/Flash RAM” This release was launched to support the new E-synth, and all other Emulator 4’s for Flash ROM and Sound ROM SIMM’s.

Version 2.5  “SysEx” This release added extensive system exclusive control and better SCSI drivers. It includes supoport for:

  • FX Option
  • Roland library import
  • SoundSprint
  • 16 track multi-mode MIDI sequencer
  • 4 new ®Z-PlaneFilters
  • ReCycle support
  • Iomega 1GB Jaz Drive support
  • numerous preset edit and DSP enhancements

Version 2.0  “Complex Filters” This release has 21 new fuilter types taken from the Morpheus synthesizer, as well as Roland sample inport and DOS disk support.

Version 1.5  “FX” Adds support for the new FX board and Soundsprint feature. Used on E4K.

Version 1.2  “SMDI”  This release adds sample dumping, E3 sample export and new solo and latch modes. SCSI disk larger than 4GB supported.

Version 1.1  “Filters” Several new filter types were added in this release – including band pass, high pass and vocal formant. Launched with early e64`s

Version 1.0  “Basic” This was the original EOS release with only three Filter types – 2, 4 and 6 pole Low Pass. It was launched with original EIV in 1994.

EOS Upgrade Advice

Overview All Emulator 4 and Ultra owners should upgrade to the latest EOS 4.10 for the best feature set and the least bugs.

4.10 Classic The owners of the original Emulator 4 range looked on as the fast new Ultras came out in early 1999. Whilst some of the later Emulator 4 models can be Ultracized, the next best option is upgrade to EOS 4.10 Classic. It provided all the 4.0 features (except Beat Munging) for owners of certain pre-Ultra Emulator 4’s, and a new CPU ROM. This is why it is called CLASSIC. If you have an Ultra you could also upgrade to 4.10 (non-Classic).

EOS 4.10 (not Classic) Ultra Owners could also upgrade to 4.10 as a straight sampler software upgrade. There is no EOS Link software (as you should have it already), and no need for a CPU ROM SIMM upgrade.

Big Flash EOS versions 4.01 and higher are so much bigger than the earlier releases of EOS that it needs more space in Flash (or CPU) ROM than is available in non Ultra Emulators. The existing 1MB SIMM needs to be replaced with a 2MB SIMM. This is ONLY available from E-mu Systems. It costs between $99 – $129 for the rack Emulators (depending on whether you already have the EOS link software). It comes with the latest 4.xx software. The E4K upgrades are much more expensive at up to $595. Check the E-mu Systems web site for details.If you have an Ultra, then you already have enough CPU ROM to run EOS 4.0+.

Bugs Life EOS 4.01 has bugs. E-mu Systems released EOS 4.02 in late 1999 to fix these. So you can only upgrade a pre-Ultra sampler to 4.02 or higher now. If you have 4.01, you should plan to move to 4.02 or 4.10 (however it can be tricky to install!).

EOS Link   The 4.01 Classic upgrade optionally includes the EOS Link software, if you need it.

EOS Link

Read All About It  To get a low down on the EOS 4.01/4.02 features before upgrading, we suggest you download the manual and take a read.

EOS 47-FAT_Addend
EOS 460 Addend
EOS 4.0

The 4.10 release is useful if you have a Proteus 1000/2000 module. Here is the Sound Author manual.



22 thoughts on “Emulator IV, EOS

  1. Just need to figure out how to get this update from PC to E64.

  2. It’s better to have an older PC that you equip with a SCSI card and a floppy. USB floppies don’t work with everything you throw at them [like Roland format] and they’re more expensive.

  3. My E4X still has 3.0 firmware…..can I update to 4.10 without trouble? Thanks…

    • Yes, you should be able to do it.
      You should then be able to upgrade to 4.10 classic
      Because of the E4X belongs to the classic family

  4. got any sound banks you could upload for this?

  5. Anyone who knows where I can download EOS 3.0b?

  6. It’s no problem, and you are absolutely right. However, a 1.44 MB disk may contain the EOS.

  7. none of the disk images fit on a floppy. they say they are 1.5meg and a floppy has just shy of that like 1.48meg so none of these images are able to be put on a floppy to be used.. thoughts anyone??

    • One of the installation disks indicates that it is 1.5 MB large, and should not fit on a standard 1.44 MB disk. However, when you start the .exe file, it will get it on a regular disk.
      … it may seem weird, but it works

  8. E4 with EOS 2.0b; is it possible to update the OS or am I stuck?

    • Yes, at least up to 3.0b and you have the OS on a floppy disk.

      • Thank you. So the 3.0b file that you have available is just the SDISK program and not the EOS system correct? I was able to create the other disks successfully with Windows, but 3.0b appears to be something else. Unfortunately, since my flash rom is 1mb, I can’t utilize those other EOS systems.

  9. I have install disks for 4.6 and 4.7 as well as flash prep. Only problem isn’t my emu esynth is at 4.02. So I can’t install them. Can’t I pay someone to put 4.1 on a floppy and mail it to me? I don’t have a PC and I’d rather just pay someone for the disk instead of trying to do it myself. Anyone out there that can help me?!?!!

  10. Those with Classic E4 rack synths that can’t go past EOS v4.10 due to the limitations of a 1MB Flash RAM SIMM card can purchase a 2MB Flash RAM card with EOS v4.62 (the highest possible in a “Classic” or non-Ultra. No flashprep required, no floppies – just open up your E4 and replace the Flash RAM SIMM card. It will reduce your total preset memory to 375k but will support higher SCSI2SD adapter based SD card EOS partitions. Look on the Facebook Emulator EIV Users Group for more information.

  11. Hi, Thank you for the Files! But there’s one issue for all Ultra Samplers – the EOS 4.62 Flash Prep “C_FLASHP.EXE” will not work for any ULTRA E-MU’s The only working Version for all Ultra’s you find here: https://www.dropbox.com/sh/auti1devndt0o7t/UwYx3m6DqV/ FLASHPRP.EXE
    If you burn a floppy disk with this the Ultra E-MU will recognize the 4.7 OS Upgrade Disk too. Otherwise an Ultra E-MU will not recognize any of your floppy disks.

  12. sorry once again – there was a space which should not be there – Here the link again “https://www.dropbox.com/sh/auti1devndt0o7t/UwYx3m6DqV/FLASHPRP.EXE”

  13. I just updated my E64 from 2.80f to 3.0b from the link above. I used an old DOS computer to create the EOS Floppy. Worked like a charm!

    Thanks a lot for uploading!

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