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The Ricoh chip has a seperate leapyear counter. 

We must write this when we write the year register, keeping them in sync.
XXX the chosen algorithm only works for 1901 <= year <= 2099.
This commit is contained in:
is 2000-01-03 21:52:14 +00:00
parent d14968078a
commit 2e3d1cc048
2 changed files with 8 additions and 4 deletions
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7
sys/arch/amiga/dev/a34kbbc.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: a34kbbc.c,v 1.5 2000/01/03 20:30:51 is Exp $ */
/* $NetBSD: a34kbbc.c,v 1.6 2000/01/03 21:52:14 is Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@ -130,7 +130,6 @@ a34kugettod(tvp)
/* let it run again.. */
rt->control1 = A3CONTROL1_FREE_CLOCK;
printf("year read: %d.\n", dt.dt_year);
if (dt.dt_year < STARTOFTIME)
dt.dt_year += 100;
@ -182,7 +181,9 @@ a34kusettod(tvp)
rt->month2 = dt.dt_mon % 10;
rt->year1 = (dt.dt_year / 10) % 10;
rt->year2 = dt.dt_year % 10;
rt->control1 = A3CONTROL1_FREE_CLOCK;
rt->control1 = A3CONTROL1_HOLD_CLOCK | 1; /* mode 1 registers */
rt->leapyear = dt.dt_year; /* XXX implicit % 4 */
rt->control1 = A3CONTROL1_FREE_CLOCK; /* implies mode 0 */
return (1);
}

5
sys/arch/amiga/dev/rtc.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: rtc.h,v 1.6 1999/03/14 22:42:12 is Exp $ */
/* $NetBSD: rtc.h,v 1.7 2000/01/03 21:52:15 is Exp $ */
/*
* Copyright (c) 1994 Christian E. Hopps
@ -92,6 +92,9 @@ struct rtclock3000 {
#define A3CONTROL1_HOLD_CLOCK 0
#define A3CONTROL1_FREE_CLOCK 9
/* mode1 registers used by us */
#define leapyear year2
#define A3BBC_SET_REG 0xe0
#define A3BBC_WRITE_REG 0xc2
#define A3BBC_READ_REG 0xc3