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1
15
2
i4
1
2
2
1
1
SYSTEM 8IOS
VGA 8IOS
EXTENDED 8IOS
ACO'23l
~cr--------------------~
_____
~-f~-~
..
~
______
~r------.
'-II 1 /
J
30
A17
t-------~~t~~--------~i~A16
t-------~I~,"~4--------~29~A15
t-------~~"~3--------~28~A14
t-------~Q(~+-------~4~A13
27C020
25 A12
"0
23 All
A(
2ti AID
27119
Q(
5
All
Q(6
6
IV
Q(S
7
A6
B :
t-------~AA~CC~~----------;~;.,O
A3 U8
ACl
11 A2
MODAO
~C)
______________________
~
____________________
~1~2~~
RDMCS_ :=::C)----------------------+------------________ ~2~OC-
CEO-
~
~
CE_
I/OO r. ' ;;-3 __
X~DC:~
01 ) c - - t
I/0'r.'~4--~XID~C:~1--__t
I/02 r.'",5 __
~
X[D~(~
2 __ __t
I/03
r.' " ,7 __
~
xnr"-' O
(!-!----t
I/04r.'~8==~x:rn~(~4====1
I/OSH'9
I/06
tc:;2;;_0--~
XlD~(:~
6--__t
I/07
r2=.1---=
XCD<>.<;C-'-__
-t
n
~U49
~~
ATSMEMW_
+SV_-----"32"1u::c
liN)
16
FLASHEN-
~D---'----"-Il~M
8USCLK
~
~119
100
1
SI'D
VCC-14
GND-7
PS2 KEY80ARD
CONTROLLER
8742
PLCC/SCCKET
Jl
+5V.-------~2~1~A
A'ROM
+12V.--------=-3--1
8
8'FLASH W/WRITE ENA8LED
9~.'1
ts05
~60
C>----------------------~--------------~------_+========:j!~~~
~~~r.~~~-----+--~+--,
r---~--------7~~T~0
~~iR~~--'~----~_+--~--_+_+_4----_.
r-~---------,,~O
TEST>
PH
~~
r---+--------------"-~~'-----~-----'
AC2l
~~~----------~-4~~4---------~,~3
AD
P1S~~
ATIOR_:=::
~ ~
=~~r38=----------'
~===============l=±±E~, ~
D--
XDIO
1""-
ATIOW_~
P20~2~4--------------_.
P21~2S~------------.
+
v
YR106
t-~~~~~XD~[~,----;,~S
00
Xn(
16 01
~n(.
17 :
XC(
4~
18
04
P22~26;=============~=t=t=t~~
P23 27
P24/[U=" :
10K
5
6
Ils05
3
~604
I
I(S05
~6~
UCC-14 1Cs05
SI'D
2
XCC 5"
19
os
XDI6
20 06
XD
21 07
~~~4;;-,------------~r-t--'
P27/~-r~~------------~~------------~------------L-~~----4_--'
GND-7
XR5T.
~
8042CS-
~
C>------------~----------------
____________
+_+__+--------~S~~T_
clss-
t-!=
U46
+5V_~ ~--'-"'"lU::C
USS 22
J8
1
A
2
8
3
+ r
YR156
!?R145
.!?R155
.!?R154
10K
10K
10K
10K
SI'D
SI'D
SI'D
SI'D
2
1
1
1
MSDATA
MSCLK
less
2CS2
F~\FT~\F
K8DATA
K8CLK
1C56
~CSl
f~\FT~\F
+ V
~R124
1 Fl
2
1
lK
SI'D
~SA
I
A
~
XDCO',5l
~
IRQl
~
ATIRQ12
~
COLOR
~
K8INHI8IT
I « } - -
1
1
1,18
4
4
'P7
1
-02
3
4
XVME-678/688 Manual
July 1994
5
MOUSE PORT
l~o
I « } - -
-06
7
f~
8
II
~
~
'P6
1
I « } - -
1-0
2
3
4
5
t.~
I « } - -
ro
6
KEYBOARD PORT
7
8
9
~
~
RESET2_
1
~
GATEA20
1
I
7
_
.....
o
i
~
X
~ com
£JU>E,KIDIIlIII<"""
6
" ' _
~
=...
pn..
SCHEMATIC
C
@ .............
XVME-688
~
,-
....
'-""
TIIUI;~"'TN.""" ~
........
~
UTTt:lXYGaIIMD ...... MDT
-
~;r:.~ 3~
72688C-OOl
XVME-6781688 &hematic Sheet
3
of 18
~5
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