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Date: Thu, 18 Apr 1996 12:37:27 +0900
From: KUMANO Tadashi (=?ISO-2022-JP?B?GyRCNydMbiEhQDUbKEI=?= ) <kumano@strl.nhk.or.jp>
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Subject: [FreeBSD-users-jp 1158] Re: cyborg-ed DHU (Re: DHU LCD (Re: QFP
	 DX4-100
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>   WriteBack $B$KBP1~$7$F$$$J$$(B chipset $B$G(B CPU $B$r(B WB $B$K@_Dj$7$?$+$i(B
> $B$G$7$g$&!#B>$K(B DMA $B$r;H$&$b$N$,$J$+$C$?$+$iI=LL2=$7$J$+$C$?$s$8$c(B
> $B$J$$$+$J!#(BWB $B$r$d$a$k$+!"(Bisa dma $B$G(B wbinvd $B$9$k$+!#(B

$BB>$N?M$K$b(B WB $B$,$"$d$7$$$H;XE&$5$l$F$$$?$H$3$m$J$N$G$7$?!%(B
$B$H$j$"$($:(B WT $B$K$7$F$d$C$F$_$F!$$&$^$/$$$C$?$i$=$l$G$h$7$H$7$^$9!%(B
$B!t(B $B$G$b(B WB $B$h$jCY$/$J$k$h$&$@$C$?$i$$$D$G$b(B WB $B$K$G$-$k$h$&$K(B
$B!t(B $B%9%$%C%A$G$bF~$l$A$c$*$&$+$7$i(B (*^_^*)

> $B$"$H(B Am5x86 $B$C$F!"(BCLKMUL $B$r(B Vss $B$G(B x4, Open/Vcc $B$G(B x3 $B$8$c$"$j$^(B
> $B$;$s$G$7$?$C$1!#$I$&$G$b$$$$$3$H$@$1$I!"$D$$$G$K!#(B

$B$?$7$+$K$=$&$G$7$?!%(B

(data sheet $B$h$j(B)
CLKMUL
Clock Multiplier (Input)
The microprocessor samples the CLKMUL input signal
at RESET to determine the design operating frequency.
An internal pull-up resistor connects to Vcc, which se-
lects Clock-tripled mode if the input is High or left float-
ing.  For Clock-quadrupled mode, the input must be
pulled Low.  For 133-MHz processors, this input must
always be connected to Vss to ensure correct operation.

$B:G8e$NJ8$O!V(B133MHz $B%?%$%W$O(B x4 $B$7$+$A$c$s$HF0$+$J$$!W$H(B
$B$$$&0UL#$J$N$+$7$i(B?
--
 kumano@strl.nhk.or.jp
 $B$/$^$N!w#N#H#KJ|Aw5;=Q8&5f=j(B
