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MEMC(4) Device Drivers Manual (mvme68k) MEMC(4)

memcMVME1[67]x memory controller

memc0 at mc0 offset 0x43000 (MVME162/172)
memc1 at mc0 offset 0x43100 (MVME162/172)
memc0 at pcctwo0 offset 0x43000 (MVME166/167/176/177)
memc1 at pcctwo0 offset 0x43100 (MVME166/167/176/177)

MVME16x and MVME17x boards support up to two memory mezzanine boards. Each board contains its own memory controller, of which two flavours exist:

MEMC040
Memory Controller with parity memory
MCECC
Memory Controller with ECC memory

The memc driver recognizes both.

intro(4), pcctwo(4)

The memc driver does not report corrected ECC memory errors.

OpenBSD-5.5 May 18, 2013 MEMC(4)