MCCLOCK(4) Device Drivers Manual MCCLOCK(4)

mcclock — MC146816, DS1287, and compatibles real-time clock

mcclock* at isa? port 0x70

mcclock* at gbus? offset ?
mcclock* at ioasic? offset ?
mcclock* at isa? port 0x70
mcclock* at jensenio? port ?

mcclock* at jazzio?

mcclock0 at mainbus? addr 0x10000070

mcclock* at isa? port 0x70

mcclock* at ibus0 addr ?
mcclock* at ioasic? offset ?

mcclock* at mace0 offset 0x3a0000

mcclock* at ofisa?

rtc* at ebus?

The mcclock driver provides support for the MC146818, DS1287 and compatibles real-time clock (RTC). Note, that the kernel expects the RTC to run in UTC.

intro(4), ebus(4), ioasic(4), isa(4)

June 19, 2026 NetBSD 11.99