Working Sun CGSix SBus Framebuffer 
  1. The minimum operating system is SunOS 4.0.3.
  2. If multiple cards are installed, the minimum OS is SunOS 4.1.1.
  3. To test multiple cards with SunDiag, 4.1.1 requires the 4.1.1 GFX Rev 2.
  4. The SS1, SS1+, and IPC require OBP 2.x.
  5. OBP 2.x for the SS1, SS1+, and IPC requires SunOS 4.1.1.
  6. The SS2 requires OBP >=2.4.