HP 9830 - I;O and Peripherals; I;O State Machine and Flags

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c
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N12B.J
STC
10
nS
U12-17
7474
9
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8
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11
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12
nR
13
4
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5
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6
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3
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2
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1
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22
B2
U12-8
74154
1-of-16
decoder
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Y0
2
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3
Y2
4
Y3
5
Y4
6
Y5
7
Y6
8
Y7
9
Y8
10
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B1
B4
20
B8
11
Y10
13
Y11
14
Y12
15
Y13
16
Y14
17
Y15
18
E2
19
E1
23
21
10
nS
U12-16
7474
9
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8
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11
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12
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13
4
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U12-17
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5
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6
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3
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1
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15
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U12-4
74193
3
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2
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6
Q2
7
Q3
nLD
D1
10
D2
11
1
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D3
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5
CUp
4
CDp
14
12
TCU
13
TCD
N12B.10
c
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8
9
U12-18
3
2
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12
13
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2
3
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13
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12
1
2
N12B.M
5
6
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4
9
8
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6
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4
12
11
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2
2
3
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1
470
IOCK1
nSFC
nSFS
nLIx
nOTx
nMIx
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6
5
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EOW
2
1
U12-18
N12B.8
6
5
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4
12
11
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13
N12B.L
4
6
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5
10
11
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8
9
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10
10
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9
nSFC
nSFS
N12B.11
nLIx
nOTx
nMIx
N13B.5
13
11
U11-4
12
10
8
U11-4
9
12
11
U11-2
13
2.7K
2
3
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U11-9
8
1
13
nCEO
4
6
5
nKSTOP
10
11
U11-3
13
11
U11-19
12
6
5
U11-3
10
U11-12
9
13
8
12
4
3
U11-20
12
13
U11-20
8
9
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2
U11-12
5
4
6
1
4
6
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5
nPOP
N11B.N
5
6
U11-11
4
9
8
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10
N11B.10
N11B.8
N11B.9
EOW
CLF
N11B.R
9
8
U11-1
10
N11A.8
6
5
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2
1
U11-20
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10
11
U11-20
4
3
U11-3
Q0(11)
STF
2
1
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Q2
Q3
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Q00000
N11B.L
Q1(11)
CLF
Q1(11)
N11A.3
DRC
Q5
Q6
Q7
Q8
U12-1
74H101
6
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8
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11
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10
8
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9
N12B.D4
QRDb
10
U12-3
8
9
11
3
2
U12-7
1
N12A.C
nSRA
nPOP
5
U12-3
6
4
3
IOCK2
5
6
U12-7
4
nPTR
Q10
Q10
Q00000
N12B.A1
N11B.F
N11A.10
N34.2
N14B.N
SCB
HP 9830 Computer
Section: I/O State Machine & Flag Sense
Page: F1 Rendition: 2014 Dec 26
STF
12
11
U12-7
13
1
3
U12-2
2
N12A.4
IOS0
CLF
N12B.13
13
11
U12-2
12
N12A.E5
nLIx
nMIx
N14A.6
N11A.C
N11B.13
Q9
n(LIx+MIx)
4
3
U12-18
N12B.9
N23A.P
LIx+MIx
nXTR
N11B.11
(nCLC)
QFG
15
14
12
10
11
5
3
2
0
1
Q00000
Printer
Enable FF
(9810/20)
PEN
Magnetic
Card FF
(9810/20)
nMFL
10
9
nQ00000
nPTF
I/O Device Flags
&
Flag Selection
I/O Channel
Decoding
I/O Command
State Machine
CHANNEL 0
CHANNEL 1
CHANNEL 2
CHANNEL 4
CPU CLOCK & I/O
Assembly 12
CPU I/O
Assembly 11