1,40U
2U
1,40L
2L
4U
5U
4L
5L
3U
0U
3L
0L
13U
15U
13L
15L
11U
14U
11L
14L
12U
10U
12L
10L
6U
7U
6L
7L
6
25
CC
1
A
N25
5
1
4
3
2
24
BB
1
A
N82A
22
Z
1
A
N82B
22
1
N82C
HP 9830 Computer
Section: Board Layout - CPU & Memory
Page: L2
Rendition: 2014 Dec 26
10
L
1
A
N21A
24
BB
1
A
N83A
22
Z
1
A
N83B
22
1
N83C
22
Z
1
A
N84A
N
A
N84C
18
V
1
A
N84B
12
1
4KW RAM
Assembly 84
T REGISTER
Assembly 83
M REGISTER
Assembly 82
BASIC ROM
Assembly 21
25
CC
1
A
N21B
XTL
14
13
12
17
16
15
19
18
6
5
7
10
9
8
1
2
3
4
11
12
11
10
CPU MICROCODE ENGINE / Assembly 13
15
14
13
17
16
3
2
4
7
6
5
18
19
20
21
1
9
8
22
23
16
15
14
CPU REGISTERS & ALU / Assembly 14
19
18
17
20
1
2
3
4
9
8
7
12
11
10
13
5
6
14
13
20
CPU I/O / Assembly 11
17
16
15
19
18
1
2
3
4
7
6
5
10
9
8
12
11
18
V
1
A
N11A
1
S
15
A
N11B
18
V
1
A
N12A
15
S
1
A
N12B
18
V
1
A
N13A
15
S
1
A
N13B
18
V
1
A
N14A
15
S
1
A
N14B
CLOCK I/O
10
L
1
A
N13C
5L
4L
5U
4U
18
V
1
A
N26
ROM BUFFER
Assembly 25
ROM CARD
Assembly Type 26
CPU CLOCK & I/O / Assembly 12
ROM CARTRIDGE BUS
Assembly 03
22
Z
1
A
N03
• All boards as viewed from component side.
3
4
5
7
8
10
6
9
1
2
1
2
3
4
5
6
7
32
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
33
34
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
18
V
1
A
NRCe
18
V
1
A
NRCd
18
V
1
A
NRCc
18
V
1
A
NRCb
18
V
1
A
NRCa
1
2
3
3
2
1
014
015
012
013
010
011
008
009
006
007
004
005
002
003
000
001
1
2
5
6
7
8
9
10
11
110
111
108
109
106
107
104
105
102
103
100
101
210
211
208
209
206
207
204
205
202
203
200
201
310
311
308
309
306
307
304
305
302
303
300
301
114
115
112
113
214
215
212
213
314
315
312
313
3
4