User`s manual
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A A
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D D
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ISA_MEM1.SCH
Am486 MICROPROCESSOR
PCI CUSTOMER DEVELOPMENT PLATFORM
2
9
1
10
Top View
JTAG Connector
81
53
49 50
78
32
1
79
82
51
29
80
52
100
MACH221SP
2
30
31
99
PORT 80
PORT 680
INTERFACE FOR ISA BUS MEMORY AND HEX DISPLAYS
ISACNTL.J1
Rev. 1.6
2.1
(C) Advanced Micro Devices, Inc. (800) 222-9323
5204 E. Ben White Blvd.
Austin, TX 78741
AMD Proprietary/All Rights Reserved
22 26
Friday, December 04, 1998
Title
Size Document Number Rev
Date: Sheet of
MACH_TCK
LOW
ATCLKO
ATCLKO
MACH_TMS
MACH_TDI
MACH_TDO
LA18
LA17
BALE
LA23
LA22
LA21
LA20
LA19
SA15
SA16
SA7
SA6
SA9
SA2
SA11
SA10
SA4
SA3
SA12
SA8
SA14
SA5
SA13
SA1
SD0
SD1
SD2
SD3
SD4
SD5
SD6
SD7
SD8
SD9
SD10
SD11
SD12
SD13
SD14
SD15
ISAD0
ISAD1
ISAD2
ISAD3
ISAD4
ISAD5
ISAD6
ISAD7
ISAD8
ISAD9
ISAD10
ISAD11
ISAD12
ISAD13
ISAD14
ISAD15
EN245#
DIR245
EN245#
DIR245
ISAD4 ISAD0
ISAD5 ISAD1
ISAD6 ISAD2
ISAD7 ISAD3
P80CS#
P80HD
P80LD
ISAD6
ISAD3
P680CS#
P680LD
ISAD4
ISAD1
ISAD2
ISAD5
ISAD0
ISAD7
P680HD
P80CS#
P680CS#
IORJ
RSTDRV
ISAA19
ISAA7
ISAA13
ISAA18
ISAA17
ISAA11
ISAA6
ISAA4
ISAA4
ISAA16
ISAA2
ISAA8
ISAA22
ISAA18
ISAA5
ISAA16
ISAA15
ISAA14
ISAA9
ISAA3
ISAA19
ISAA12
ISAA1
ISAA1
ISAA13
ISAA5
ISAA22
ISAA21
ISAA7
ISAA15
ISAA23
ISAA20
ISAA10
ISAA6
ISAA10
ISAA20
ISAA21
ISAA17
ISAA23
ISAA9
ISAA3
ISAA2
ISAA11
ISAA12
ISAA14
ISAA8
SA0
SA0
XBUSCSJ
IOCHRDYJAEN
MRDJ
MWTJ
SMEMWJ
SMEMRJ
IOWJ
REFRESHJ
BALE
N0WSJ
ATCLKO
IORJ
MEM16J
LA[17..23]
ISAA[1..23]
BALE
SA[0..16]
SD[0..15]
ISAD[0..15]
ROMCE#
ROMOE#
ROMWE#
RSTDRV
XBUSCSJ
VCC
VCC
VCC
VCC
VCC VCC
VCC VCC
P48
HEADER2X5; SHRD
2
34
56
78
910
1
R134 1K
U70
74ABT16244
1
48
7
18
25
24
31
42
47
46
44
43
41
40
38
37
36
35
33
32
30
29
27
26
21
4
10
15
2
3
5
6
8
9
11
12
13
14
16
17
19
20
22
23
28
34
39
45
1OE#
2OE#
VCC
VCC
3OE#
4OE#
VCC
VCC
1A1
1A2
1A3
1A4
2A1
2A2
2A3
2A4
3A1
3A2
3A3
3A4
4A1
4A2
4A3
4A4
GND
GND
GND
GND
1Y1
1Y2
1Y3
1Y4
2Y1
2Y2
2Y3
2Y4
3Y1
3Y2
3Y3
3Y4
4Y1
4Y2
4Y3
4Y4
GND
GND
GND
GND
U69
74ABT373
3
4
7
8
13
14
17
18
1
11
2
5
6
9
12
15
16
19
D0
D1
D2
D3
D4
D5
D6
D7
OE#
E
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
U71
74ABT16245
47 2
3
5
6
8
9
11
12
13
14
16
17
19
20
22
23
44
43
41
40
38
37
36
35
33
32
30
29
27
26
46
31
42
7
18
48
25
1
24
28
34
39
45
21
4
10
15
1A1 1B1
1B2
1B3
1B4
1B5
1B6
1B7
1B8
2B1
2B2
2B3
2B4
2B5
2B6
2B7
2B8
1A3
1A4
1A5
1A6
1A7
1A8
2A1
2A2
2A3
2A4
2A5
2A6
2A7
2A8
1A2
VCC
VCC
VCC
VCC
1G#
2G#
1DIR
2DIR
GND
GND
GND
GND
GND
GND
GND
GND
U72
Hex Display
TI - TIL311
14
7
3
2
13
12
1
5
8
4
10
6
9
11
VCC
GND
DA
DB
DC
DD
LED
STRB
BLNK
LDC
RDC
NC
NC
NC
U73
Hex Display
TI - TIL311
14
7
3
2
13
12
1
5
8
4
10
6
9
11
VCC
GND
DA
DB
DC
DD
LED
STRB
BLNK
LDC
RDC
NC
NC
NC
R135
330
R136
330
R137
330
U75
Hex Display
TI - TIL311
14
7
3
2
13
12
1
5
8
4
10
6
9
11
VCC
GND
DA
DB
DC
DD
LED
STRB
BLNK
LDC
RDC
NC
NC
NC
R138
330
U74
Hex Display
TI - TIL311
14
7
3
2
13
12
1
5
8
4
10
6
9
11
VCC
GND
DA
DB
DC
DD
LED
STRB
BLNK
LDC
RDC
NC
NC
NC
U55
MACH221SP-7Y
56
58
59
60
61
62
69
70
71
72
73
75
82
84
85
86
87
88
93
94
95
96
97
99
6
8
9
10
11
12
19
20
21
22
23
25
32
34
35
36
37
38
43
44
45
46
47
49
13
18
26
54
63
68
76
4
3
28
53
78
1
2
16
17
29
30
40
41
51
52
66
67
79
80
90
91
5
7
24
27
31
33
48
50
55
57
74
77
81
83
98
100
14
15
39
42
64
65
89
92
I/O30
I/O31
I/O32
I/O33
I/O34
I/O35
I/O36
I/O37
I/O38
I/O39
I/O40
I/O41
I/O42
I/O43
I/O44
I/O45
I/O46
I/O47
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
I/O8
I/O9
I/O10
I/O11
I/O12
I/O13
I/O14
I/O15
I/O16
I/O17
I/O18
I/O19
I/O20
I/O21
I/O22
I/O23
I/O24
I/O25
I/O26
I/O27
I/O28
I/O29
I0/CLK0
I1/CLK1
I2
I3
I4/CLK2
I5/CLK3
I6
I7
TDI
TCK
TMS
TDO
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC