Service manual
1
2
3
4
5
B
C
B – 14
Diagrams
B
PIIX4
REV. 2
(DIAGRAM 1 OF 2)
FIG. B  13
CRT & TV
+3VS
+3VS
+5VH8
+3VH8VBAT
VBAT
+3V
+3V
+3V
DEVSEL#8, 16, 24, 25
SD[0..15] 16,18,20
SA [0. . 18] 1 6,1 8,2 0
KBCCS# 20
BIO SCS# 16
ST O P#8, 16, 2 4, 25
CPU_ST PCLK# 3
NMI 3
T RDY #8, 1 6, 24, 25
CPU_INIT # 3
IG NNE# 2
RST DRV18
C/BE3#8, 24,2 5
C/BE0#8, 24,2 5
IOR#16,18,20
PAR8, 24, 25
IO CHRDY16,18
IOW#16,18,20
A20M# 2
FRAME#8, 16, 2 4, 25
SERR#8,16, 24
C/BE2#8, 24,2 5
CPU_SM I# 3
MEMW#16
RCIN# 20
ECCS# 20
INTR 3
PHOLDA#8, 16
A20G AT E 20
FERR# 2
IRDY #8, 16, 24, 25
CLKRUN#8, 16, 18, 24
MEMR#16
AEN18
C/BE1#8, 24,2 5
ZWS#16
MEM16#16
REFRESH#16
IOCS16#16
AD[0..31]8, 24, 25
PDCS3#17
PDCS1#17
PDIOR#17
PDIOW#17
PDDACK#17
PDDREQ17
PDIO RDY17
T USBP1- 16
T USBP1+ 16
OC0# 16
PDA[0..2]17
PDD[ 0.. 15]17
SDA[0..2] 17
SDD[ 0.. 15] 1 7
SDCS3# 17
SDCS1# 17
SDIOR# 17
SDIOW# 17
SDDACK# 17
SDDREQ 17
SDIORDY 17
PCI_VREF 8
SBHE#16
PRST # 9,24
PHOLD#8, 1 6
PCIRST # 8,24,25
SUSB#
PCS0# 16
AD18
SD2
AD25
AD6
PDDREQ
AD5
AD4
AD0
AD31
AD3
PDIOR#
AD30
AD24
AD2
SD14
SD5
AD28
AD22
AD21
AD10
AD20
AD16
AD9
SD13
SD9
SD0
AD19
AD17
AD15
C/BE3#
AD23
AD14
AD11
PDCS1#
SD7
AD29
AD12
AD[0..31]
SD6
SD3
C/BE2#
AD8
AD1
SD12
SD10
C/BE1#
AD13
AD7
SD15
SD1
SA19
PDIOW#
AD27
AD26
PDIO RDY
PDDACK#
SD8
C/BE0#
AD18
PDCS3#
SD4
SA12
SA15
SA4
SA17
SA14
SA9
SA3
SA11
SA6
SA1
SA5
SA18
SA16
SA10
SA13
SA8
SA7
SA [0. . 18]
SA2
SA0
SD[0..15]
PDD[ 0.. 15]
PDA[0..2]
SDA[0..2]
SDD[ 0.. 15]
SDCS3#
SDCS1#
SDIOR#
SDIOW#
SDDACK#
SDDREQ
SDIO RDY
PDD0
PDD1
PDD2
PDA0
PDA1
PDA2
PDD3
PDD4
PDD5
PDD6
PDD7
PDD8
PDD9
PDD10
PDD11
PDD12
PDD13
PDD14
PDD15
SDA2
SDA1
SDA0
SDD15
SDD14
SDD11
SDD13
SDD12
SDD8
SDD10
SDD9
SDD5
SDD6
SDD7
SDD4
SDD0
SDD1
SDD2
SDD3
SDCS3#
SDCS1#
SDIOR#
SDIOW#
SDDACK#
SDDREQ
SDIO RDY
SD11
RESET #
RESET #
PCIRST #
PCIRST #
RESET #
PCIRST #
U39A
PIIX4E
B10
A10
D9
C9
B9
A9
D8
E8
B8
A8
D7
C7
B7
A7
D6
E6
E4
C4
B4
A4
D3
E3
C3
B3
E2
C2
B2
A2
D1
E1
C1
B1
C8
C6
D4
D2
C10
E5
A5
A3
B5
B6
A1
B12
A12
A6
D5
C5
U11
T11
Y11
T10
W10
U9
V9
Y9
T8
W8
U7
V7
Y7
V6
Y6
T5
W5
U4
V4
V3
W3
U2
T2
W2
Y2
T1
V1
W16
T16
Y17
V17
Y18
W18
Y19
W19
Y4
U10
Y1
T3
V12
Y5
Y12
V15
U15
W7
W12
W1
W4
U3
Y3
F20
E18
E20
D18
D20
C20
B20
A20
A19
B19
C19
D19
D17
E19
E17
F19
W11
G16
G18
G17
H17
G19
F18
F16
G20
E15
B15
D14
C14
A14
C13
A13
C12
D12
B13
D13
B14
E14
A15
C15
D15
C17
B17
A18
B18
C18
A17
A16
C16
B16
D16
J1
J2
G2
H3
H2
F1
M20
M19
K19
L1 7
L1 8
L1 9
L2 0
K20
P20
J18
P1
M2
K1
N4
L4
N5
N20
L1
K2
M3
M4
E9
E11
E12
E16
F5
F6
F14
F15
G6
P15
R6
R7
R15
T6
L1 6
N16
R16
K5
J16
D10
E7
E13
J9
J10
J11
J12
K9
K10
K11
K12
L9
L1 0
L1 1
L1 2
M9
M10
M11
M12
J5
F17
H16
T4
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
AD16
AD17
AD18
AD19
AD20
AD21
AD22
AD23
AD24
AD25
AD26
AD27
AD28
AD29
AD30
AD31
C/BE0#
C/BE1#
C/BE2#
C/BE3#
CLKRUN#
DEVSEL#
FRAME#
IDSEL
IRDY #
PAR
PCIRST #
PHOLD#
PHLDA#
SERR#
ST O P#
T RDY #
SA0
SA1
SA3
SA4
SA5
SA6
SA7
SA8
SA9
SA10
SA11
SA12
SA13
SA14
SA15
SA16
SA17
SA18
SA19
SD0
SD1
SD2
SD3
SD4
SD5
SD6
SD7
SD8
SD9
SD10
SD11
SD12
SD13
SD14
SD15
AEN
BALE
IOCHK#/GPI0
IO CHRDY
IOCS16#
IOR#
MEMCS16#
MEMR#
MEMW#
REFRESH#
SBHE#
RST DRV
SMEMR#
SMEMW#
ZEROWS#
PDD0
PDD1
PDD2
PDD3
PDD4
PDD5
PDD6
PDD7
PDD8
PDD9
PDD10
PDD11
PDD12
PDD13
PDD14
PDD15
SA2
PDA0
PDA1
PDA2
PDCS1#
PDDACK#
PDDREQ
PDIOW#
PIO RDY
SDD0
SDD1
SDD2
SDD3
SDD4
SDD5
SDD6
SDD7
SDD8
SDD9
SDD10
SDD11
SDD12
SDD13
SDD14
SDD15
SDA0
SDA1
SDA2
SDCS1#
SDCS3#
SDDACK#
SDDREQ
SDIOR#
SDIOW#
SIO RDY
OC0#
OC1#
USBP0+
USBP0-
USBP1-
USBP1+
A20M#
CPURST
FERR#
IG NNE#
INIT
INTR
NMI
SLP#
SMI#
ST PCLK#
A20G AT E
BIO SCS#
KBCCS#/G PO26
MCCS#
PCS0#
PCS1#
RCIN#
RT CALE/G PO25
RT CCS#/G PO24
XDIR#/G PO22
XO E#/G PO23
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCCRT C
VCCSUS
VCCSUS
VCCUSB
VREF
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GNDUSB
PDIOR#
PDCS3#
IOW#
R339
10K
R345
10 0
R148
56 0
R145
75 0/ 1%
R144
2K/ 1%
T86
T66
T69
T87
T72
T68
T67
PAD
D11
RB75 1V
1 2
D12
RB75 1V
12R365
10K
C501
.1UF
C474
.1UF
C482
.1UF
C470
.1UF
C471
.1UF
C496
.1UF
C494
.1UF
C481
10UF/16V
C485
10UF/16V
C499
10UF/16V
C505
.1UF
C506
.1UF
D29
1N4 14 8
1 2
BT 1
*VL1220/1FC
12
T62
T70
T65
R370
*0
R372 0
R344 33
R377
33 0K
C148
1UF /16V
C231
.1UF
JBAT 1
HRS/CO N2
1
2
1
2
U43 74LVC74
141
52
63
9
4
8
13
7
12
11
10
VCCCLR1#
Q1D1
Q1#CLK1
Q2
PR1#
Q2#
CLR2#
GND
D2
CLK2
PR2#
R381 0
R378 *0
T194
PCI
USB
X-BUS
HOST
PRI. IDE BUS SEC. IDE BUS
BUS
GROUND
POWERISA BUS INTERFACE
~2.6V~2.8V
211:"
R365,R377,R381
C506,U43
FOR 443BX/ZX-M
R378 FOR 443ZX