HP9000 C160 Z-Buffer Accelerator Board (A4242A, 1 of 2 Boards in A4079B, 1 of 2 Boards in A4441A, 1 of 2 Boards in A4442A) – For HyperCRX-8 (A4070B) or HyperCRX-24 (A4071B) Graphics Boards