Fix typos, add articles, use more markup.
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.\" $NetBSD: mk48txx.4,v 1.12 2003/11/02 04:20:04 tsutsui Exp $
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.\" $NetBSD: mk48txx.4,v 1.13 2003/11/02 09:08:16 wiz Exp $
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.\"
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.\" Copyright (c) 2000, 2002 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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@ -40,7 +40,8 @@
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.Sh NAME
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.Nm mk48txx
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.Nd
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.Tn Mostek time-of-day clock driver
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.Tn Mostek
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time-of-day clock driver
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.Sh SYNOPSIS
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.In dev/ic/mk48txxreg.h
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.In dev/ic/mk48txxvar.h
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@ -58,8 +59,9 @@ are provided through the
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interface defined in
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.Xr todr 9 .
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.Pp
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To tie in instance of this device to the system, use mk48txx_attach function
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and mk48txx_softc structure defined as follows:
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To tie an instance of this device to the system, use the
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.Fn mk48txx_attach
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function and the mk48txx_softc structure defined as follows:
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.Pp
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.nr nS 1
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.Ft "void"
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@ -92,7 +94,7 @@ struct mk48txx_softc {
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Specify bus space access to the chip's non-volatile memory
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.Pq including the clock registers .
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.It Fa sc_handle
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TODR handle passed to
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TODR handle passed to the
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.Fn todr_attach
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function to register
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.Xr todr 9
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@ -102,27 +104,33 @@ The chip model which this instance should serve.
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Must be one of
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.Dq mk48t02 ,
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.Dq mk48t08 ,
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.Dq mk48t18
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.Dq mk48t18 ,
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or
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.Dq mk48t59 .
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.It Fa sc_nvramsz
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Size of non-volatile RAM in the Mostek chip. This value is set by
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.Fn mk48txx_attach
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function.
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Size of non-volatile RAM in the
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.Tn Mostek
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chip.
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This value is set by
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.Fn mk48txx_attach .
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.It Fa sc_clkoffset
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Offset into the control registers of the Mosteck chip. This value is set by
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.Fn mk48txx_attach
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function.
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Offset into the control registers of the
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.Tn Mostek
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chip.
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This value is set by
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.Fn mk48txx_attach .
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.It Fa sc_year0
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The actual year represented by the clock's
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.Sq year
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counter.
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This is generally dependent on the system configuration in which
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the clock device is mounted.
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For instance, on Sun Microsystems machines
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the convention is to have clock's two-digit year represent the year 1968.
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For instance, on
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.Tn Sun Microsystems
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machines the convention is to have clock's two-digit year represent
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the year 1968.
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.It Fa sc_flag
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This flag is used to specify machine dependent features.
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This flag is used to specify machine-dependent features.
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.It Fa sc_nvread
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.It Fa sc_nvwrite
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Specify alternate access methods for reading resp. writing clock
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@ -144,7 +152,7 @@ location to be read from or written to, respectively.
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Note that if the resulting date retrieved with the todr_gettime() method
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is earlier that January 1, 1970, the driver will assume that the chip's
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year counter actually represents a year in the 21st century.
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This behaviour can be overridden by setting
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This behaviour can be overridden by setting the
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.Va MK48TXX_NO_CENT_ADJUST
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flag in
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.Fa sc_flag .
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