Appendix 2; 4431 Cpu Circuit Diagram 1(5) - Facit 4431 Service Instruction

4
A
X3
I
+ 17V
+17V
2
+ 12V +12V
4,5
+S'/ --+---~----~-+S'/
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7 . 8 Toon IJOµ
OV--+----_i_:__.._ _ _ _ _
_i_:_--+---1
~(S)
6
12V - - t - - - - - - - - - - - - 1 2 V
3
-23V - - t - - - - - - - - - - - - 2 3 Y
+5V +5'/
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0
l
83
12
~~
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~
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10
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9 D9
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0.1µ
&
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t-------=23 Y(x)
-12V
APPENDIX 2 4431 CPU CIRCUIT DIAGRAM 1(5)
31
B
c
+S'i
D42 D72
~
CPU
BUSAK
~
AO
,----~~-;Al
PWM
MP~~~ ~~Q
Al
•~--~6__.~
2048 X 8
JORQ~IORQ
A 2
5 AB
CLK
_l 6
¢
4BUSRQ
~HALT
WAIT
1~-~'°-= 16 -aWAIT
INT I? INT
RD~
RWDR
~~ ~
AAJ
3
6 2
WP t'2S . AS
RFSH
Wo
A6
1~--~T--iA64
AO~
AO A7 23 Al28
Al
~
Al AB 22 AA255126
A2~A2
A9 19
A3
t3H
A3 AIO AI024
NMI 26 NMI
RESET RESET
A4
~
A4
,--foe
2Cl/G3/F5
AS ~ AS
r2f<=
G2/F4
AG ~ A6
.g41F4
_r
DO
~DO ~~ I ~~ ~ ~~
A,2,3/4/5
~
DO
DI
~-D:
A9
~A9 A.ID~
JO
D2
V--S
D2 AIO
~
AJO 1:: II
~DI
D3
v----t'"
D3
~ All~ All
13
D2
D4 v---g--D4 Al2
~Al2
1::14
~D3
DS ~D5 AJ3 ~AJ3
15
D4
D6
~D6
Al4
~
Al4 1::!6
~
DS
D7
v----=--
D7 AJ5
r-=---'1
AJS
~ D6
~---~ 1~~ '-.D7
-'-(S)
D73
AO
~-~ 1 = 0 --<AI
POM
Al
~-~ 9 --<A2
8192 x8
A2 S A4
A3 7 AS
A4 6 Al6
AS
1~--~ 5 --iA32
A6 4 A64
3
A7
25
Al2S
AB
24
A256
A9 2 : A512
Al O
23
AI024
+SY All 2 A2048 +SV
Al2
27
A4096
-riGI
AIS
•~-~ 2 ~ 0 ..ri<iG2
/F4
~G3/F4
~---+-----+--'!___,_, ..r:
Al23 /4
~DO
,____ _
____.~
DI
t------<~D2
,____ _
____.~
i)3
l-----r~D4
t-----t~DS
1-------i~
'-
D6
~
'- D7
D
AO
Al
A2
A3
A4
AS
A6
A7
AB
A9
AIO
All
AJ2
AIS
E
D74 D7S
10
Al
ROM
9
A2
8i92 x8
s
7
A4
6
AS
s
A!6
4
A32
3
A64
25
Al2S
24
A256
21
A5;2
23
AI024
2
A2048
+SY
27
A4096
GI
20
AO JO Al
ROM
Al
~
A2
8192 x8
A2 7 A4
A3 AS
A4
v----~Al6
AS 4 - A32
A6
3
A64
A 7 251AJ2S
AB
24
A256
A9 2 ; A512
AJO
23
AJ024
All A204S
Al2
2 ~
A4096
+---·--+---~<
1GJ
G2 /F4
r1f-1
G3 /F4
AJS
2 ,~-<j
G2 /F 4
~G3/F4
~--+-----+-'I___,_,
..!'.
..!'. II
Al 2 3 13_
Pi2'
DO
~DI
IS D2
~D3
17 D4
~DS
~g~
Al 23 d._
~DO
t-----t~DI
t-----;t' IS '- D 2
t-----t~D3
1 - - - - - - - i h l I _ '-
D4
t'10 '- DS
~D6
t------.~
D7
>---~'--+------+----.,.-----ll-------''------l---------11--~-~'--+-------+-~~-'~--+-------+--~
RESET
CLK
MPQ
MRQ
13-Ghf-
D24
Al4
Dl4 Di6
9
&
8
AJS
I ~-+-~2_,
3 -
AJ2 I Al
--)-IA
h1i
~---AO
1~--- Al
1~---
A2
•~--- A3
•~---
A4
•~---AS
•~--- A6
•~--- A7
•~---AB
•~--- A9
1~---
AIO
1~---
All
•~---- Al2
•~--- Al3
•~--- Ai4
•~--- AiS
,,------- DO
V---
DI
v---
D2
v---
D3
v---
D4
V---
DS
~D6
~D7
D26
BC
1(1)
JO D32 &
s
2 D32
3
~l:E3CI
i-=----+-------------+-~ 1 -nC2/G3
+SV 10 ' : :!. -"'
:Jl- ~O
Al3 2 A2
~ ~
Al4 3 A4
2~
4
~A3
Pit
A I 3
t-----4--
I
Al4~ 2
4 1pt-- [
oP}-
II
CLK
RESET
T
Ml
D36 DIS D2S
Al2
f'-b-
Al
---1--p
P&
Al2 f'--1-1
AJ-~O
P&
BC/(1)
Al3~ A2
I
pf}
Al3~ A2
I
Pit
~I
(0
~
Al4~ A4
2
~
tl4 ~ A4
2
~
3 2
4
li
[']'~
~o
['J'l
P1F-
AIS ~
J, I
AIS
'4q
P&
,-1<j
G4
7
ric
~2
ric pJf
~
* 3
~
-~
pl---
D2S
WR
BC
/(1)
~1
(oW
~~13"--'2
I
pjk.
4
l2
PkL--
+i2Y
1~--~
1
~<iG4
3
~
~~~-------+-J ~---
1~ u~ 1~ ~--~
RD
~i;,2c;<-D----l
~20
4
[g!l
r---+ . . .
2~D
_ _ __.
1--+5,,_2~D
_ _ __.
~----~s'"<..l
&
~ ~
~+-------~6~ ~~
7~
r---i-s
2D
9
~2D >--=---+---+---~
-'-(S)
pl_
+5~~~9
12 ID
.--+--+-~ 11 '--<>cl
a 4
~R ~
&
6 WAIT
BL(VG)
~D 2 ~ 1 '~ 5 --~ ~
5 D32
J
MSEUSG) ~0~ 5 '~: 2 ~--~
+---+---O-K'N_R_.(S_G_)~0~3-:~S~~~~~~---
4 6 054:J WR ASClliMEM)
~
D 33 '
1 RD KBD(l/0)
~---------"-0= 53 ,__:
I"-:
WR
A TT.(MEMl
~I
_ _ _ _ _ _ _ _ _ _ _
J_~r---------'0= 5 ~ 5 ' - ' - ;
RD ASC: J(MEMl
~--------~ 0 ~ 54 ~'~ 11
LE(MEM)
5
1
6
J
D24
- - - - - - " - I l l
1
nl=0-+---+-+-+-+-~-~~~44
II D64 ,
lr1C::.;t"
'----+--'OJ C1 13
1
pl"'-2 _ _
~D6_5--t-------'-++-t-------,
D63
~--------------------"o"" 7 J'""":J"'--g
RD ATT.(MEMl
D6S . - - , IL
DI
~
1J
~
,-----3"--IJ
1
~
4
~----'-l
g~ ~ i~_I
rl
1
F6
~
L
D2
~~
12 D6S r - 1
l
12 DATA 1/0
7 Cl
EAR OM
s
C2
9
~
+SV
Circuit Boord:
063
064
042
20
072
24
CG4
~pL
~Q 13~1'
I
,~R_D_~12,,_.~
CLK
RD
WR
IORQ
MRQ
Ml
WAIT
INT
NM!
RESET
1141 93 30-00
I
2
10
29
12
D4 r----J_~ 9
9J
1 h1 0 S"--t-~
DS ~iv--------16
065
C3
ro~ ~071[5.6K
~
~~
043 ' 6 EAROM(l/0)
073.074,075 26/28 14
D6
l'----J.~~2~~
D7~rl1-,
0 1~---~DS~6~: 9 ~wR BRT(VG)
I 049: 9 WR CRTC(SG)
2 04S: 23 WR KBD(l/O)
3 024: 9 (SG)
~-----------"-D= 23 ,__' 1 ~ 2
SCREEN BLANK('IG)
~-----------~ 0 = 2 0,__: ~S
KILL JNT(SG)
~------------~D= 5 ~'
S,__80/132(SG)
6 CLOCK
-'-(S) -'-(S)
014,15.16,25,26.36 16 8
09,17 ,24,31.32, 3 4.65 14 7
JC +SV OV +i2V -23V(x)
Pin Number, DC-Supply Voltage