Enzian Design Sources v1.5c
===

This archive contains the original design sources for the Enzian mainboard
version 1.5c, including QSFP sub-board, regulator patch PCB, and assorted
mechanical components such as the ATX IO shield and assembly jigs. The
subdirectories are:

    Flyover_Support/
        - 3D-printed plastic support beams for the QSFP28 (FPGA 100GbE) and
          QSFP+ (CPU 40GbE) flyover cables.
    Heatsink_Backplate/
        - Sheet steel support bracket that spreads the heatsink loads across
          the PCB.
    Heatsink_Isolierfolie/
        - Isolating film mounted between backplate and PCB.
    IO_Shield/
        - ATX IO shield with cutouts for 6 QSFP connectors, compatible with a
          standard ATX or SSI EEB chassis.
    Jig_BMC_Heatsink/
        - Assembly jig for mounting the BMC module heatsink.
    Jig_QSFP/
        - Assembly jig for press-fiting of QSFP cages.
    PCB_Main/
        - Altium sources for the main PCB.
    PCB_Patch_LT1764/
        - Altium sources for a small patch PCB used to substitute one of the
          power regulators with a higher-current model.
    PCB_QSFP/
        - Altium sources for the QSFP sub-board.

Files in this archive are in their original format, as used for the production
of the first generation of Enzian machines.  As such, they represent a variety
of proprietary formats, fully compatible only with closed source tools,
principally Altium Nexus/Designer.  Versions of these files exported as
faithfully as possible into open formats will be available in a separate
archive.

File formats represented, and for proprietary formats the latest tested vendor
tool version, are:

Altium Designer version 21.9.1 build 22:
    *.BomDoc - Bill of materials (parts list)
    *.Harness - Harness definitions (interfaces e.g. DDR4)
    *.IntLib - Integrated parts library
    *.OutJob - Output job definition (e.g. Gerber generation)
    *.PcbDoc - PCB layout
    *.PCBDwf - 2D CAD drawing
    *.PrjPcb *.PrjPcbStructure *.PrjPcbVariants - Project definition
    *.SchDoc - Schematic sources

Autodesk Autocad
    *.dxf - Drawing Exchange Format (2D CAD)

DesignSpark Mechanical version 5.0 (2020 R2) (2020.1.0.07232):
    *.rsdoc - 3D CAD

Microsoft Word
    *.docx

Open-source tools:
    *.xcf - GIMP 2.10.22

Adobe Acrobat
    *.pdf

Open formats:
    *.stp - ISO 10303-21 (STEP), Freecad 0.19
    *.stl - Triangulated surface data, Freecad 0.19
    *.txt - UTF-8 text
    *.csv
    *.jpg
    *.png
