HP 9830 Quick start guide

Hewlett-Packard
9830
Computer
Schematic
Contents
Section Assemblies Page
Title & Contents (this page) -N1
Notes -N2
Block Diagram -N3
CPU Clock 12 P1
CPU Microcode Sequencing 13 P2
CPU Microcode Controls 13, 83 P3
CPU Registers 14, 83 P4
CPU ALU 14, 83 P5
M Register & Memory Cycle Generator 82 M1
T Register & Memory R/W Busses 83, 03 M2
ROM Bank Selection 82, 25, 03 M3
ROM Addressing 82, 25, 03 M4
BASIC ROM 21 M5
ROM Cards & Cartridges 26, (RC) M6
RAM Bank Selection & Addressing 82 M7
RAM 4K Assembly 84 M8
I/O State Machine & Flag Sense 11, 12 F1
I/O Flags & Register, 9866 Interface 11, 02 F2
I/O Busses 11, 02 F3
NOTE
This schematic has been derived through
examination of the equipment.
This is not the manufacturer’s schematic.
© bhilpert / 2013
Contents (continued)
Section Assemblies Page
Keyboard Logic 32 K1
Keyboard 31, 32 K2
Display Scan Logic 42 D1
Display Column Drivers 41 D2
Display Characters Left-16 41 D3
Display Characters Right-16 41 D4
Tape Interface 61, 62 T1
Tape Command Decode 62, 61 T2
Tape Drive 64, 65 T3
Tape Data Clock 62 T4
Tape Read/Write 63, 65, 66 T5
Tape Read 63 T6
Power Supply 51 S1
IC Units List -A1
IC Types List, Calculations -A2
Signal Names - A3
Memory Map, Timing Diagrams -A4
Board Layout - Backplane -L1
Board Layout - CPU & Memory -L2
Board Layout - Devices & Power Supply -L3
Connectors - CPU & ROMS -L4
Connectors - Power Supply & Memory -L5
Connectors - Devices -L6
HP 9830 Computer
Section: Title & Contents
Page: N1 Rendition: 2014 Dec 26

Unit 1303A00748
Unit 1303A00748
Unit 1303A00748
Busted 'A' Remnants
Busted 'A' Remnants
Busted 'A' Remnants
Assembly Name A# RE
USE
Foil # REV Comp Date Stamp Date RE
USE
Foil # REV Comp Date Stamp Date
Backplane 1 * • 09830-66501 REV B -APR 09 1973 -
External I/O Bus 2 * • 09830-66502 REV C 7305 APR 13 1973 09830-66502 REV C 7523 -
ROM Cartridge Bus 3 * • 09830-66503 REV B 7312 APR 16 1973 09830-66503 REV C 7528 -
CPU I/O 11 np - - * • 09810-66511 REV B 7540 -
CPU Clock & I/O 12 np - - * • 09810-66512 REV C 7528 -
CPU Microcode Engine 13 np - - * • 09810-66513 REV A 7536 -
CPU Registers & ALU 14 np - - * • 09810-66514 REV A 7539 -
BASIC ROM 21 np - - * • 9830-66521 REV A 7406 -
M Register 82 np - - * • 09830-66582 REV B 7419 -
T Register 83 np - - * • 09830-66583 REV A 7313 JUN 05 1973
4KW RAM 84 np - - • 5020-8304 REV A 7419 -
" 84 np - - * • 5020-8304 REV A 7325 MAY 24 1973
ROM Buffer 25 * • 09830-66525 REV A 7312 MAR 30 1973 09830-66525 REV B 7536 -
ROM Card 26 np - - * • 5020-6884 REV A 7532 -
Keyboard Matrix 31 * 09830-66531 REV B - - • 09830-66531 REV B - -
Keyboard Encoder 32 * • 09830-66532 REV D 7649 - 09830-66532 REV D 7537 -
Keyboard Interconnect 34 * • 09830-26534 REV B - - 09830-26534 REV B - -
Display 41 * • 09830-66541 REV D 7452 - 09830-69541 REV E 7511 -
Display Logic 42 * • 09830-66542 REV A 7308 MAR 30 1973 np - -
Power Supply 51 09830-66551 REV A 7308 - * • 09830-66551 REV A 7526 -
Tape Interface 61 *M •09830-66561 - 7307 APR 17 1973 09830-66561 7531 -
Tape Control 62 *M •09865-66562 REV B 7309 MAR 24 1973 np - -
Tape R/W 63 *M •09865-66563 REV C 7313 APR 11 1973 09865-66563 REV D 7408 DEC 12 1973
Tape Motor Control 64 *M •09865-66564 REV B 7311 APR 24 1973 np - -
Tape Interconnect 65 * • 09830-66565 REV B 7405 JAN 17 1974 np - -
Tape Head Amp 66 * • 09865-66566 REV B 7349 - np - -
NOTES
•Printed circuit boards are identified by the Assembly Number printed in the foil
of the circuit board. The last two digits of the assembly number distinguish
each board type, and correspond to the color coding of the board extraction
handles.
•This schematic presents the 4KW RAM board-set so the assemblies are
identified as 82,83,84. The connectors they plug into remain identified as
N22,N23,N24, from the original design for 2KW RAM boards.
•IC locations are identified by a label of the form:
U <assembly-type> – <enumeration>
or
U <assembly-type> – <row-alpha> <column-number>
A few boards have the IC locations in the foil, these are used for the
enumeration if present. For the CPU and tape drive boards the same
enumeration as presented in the HP patent and service manual is used.
For other boards, a row-column locator is used, with the row specified by
a,b,c,.. and the column by 1,2,3,.. starting at the upper left corner.
•The symbol represents a connector pin. The solid black end is the male
side, the white-filled end is the female side.
Connector pins are identified by a label of the form:
N <assembly-type> . <pin>
•A small black rectangular marker on the upper half of a gate symbol indicates
an open-collector output.
•Capacitance in microfarads unless otherwise noted.
•This schematic is based on a reverse engineering of the 9830 board
assemblies listed in the accompanying table, along with some use of the
9830 patent (US #4,012,725) and the tape drive schematics available in the
the 9830 service manual.
•2013 Spring - 2014 Spring: Drawn by bhilpert.
2014 Oct 02: typo correction nMW75-->nMW15, pg M8.
2014 Oct 12: corrections to 9866 connector pin labels, pg F2.
2014 Dec 26: correction, U42-c2.2 to V+5 rather than GND, pg D1.
HP 9830 Computer
Section: Notes
Page: N2 Rendition: 2014 Dec 26

HP 9830 Computer
Section: Block Diagram
Page: N3 Rendition: 2014 Dec 26
Q Register - 16 bits
P Register - 16 bits
A Register - 16 bits
B Register - 16 bits
Binary ALU
(ROM 1)
E - 4 bits
BCD ALU
(ROM 2)
R-BUS
S-BUS
BCD
Carry FF
Binary
Carry FF
3
3
3
T-BUS
Processor Registers
Memory
Address
Memory
Write
Memory
Read
P Register = Program
Counter
Microcode
Address
Register
- 8 bits
Controls
8
4
4
Branch
Condition
Selector
Branch
Conditions
Microcode
ROM 5
Microcode
ROM 6
Microcode
ROM 7
Microcode
ROM 8
Microcode
ROM 9
Microcode
ROM 3
Microcode
ROM 4
Clock
Signals
8 MHz
Clock
Variable
Cycle
Generator
Microcode
Engine
SA
PA
SM
PM
PA / SA : Primary / Secondary Address
PM / SM : Address Modifier
Memory
Subsystem
RAM
Bank
Decoding
M Register -16 bits
RAM
2 * 4KW
BASIC ROM
7KW
BASIC II / 1KW
Cartridge ROMs
16
16
T Register -16 bits
Option ROMS
Memory
Cycle
State
Machine
Refresh
Counter
5
5
5
ROM
Bank
Decoding
6
9
15
3 * 1KW
5 * 1KW
8
14
8
10
I/O State Machine
& Command Decoding
I/O Subsystem
& Devices
DI / SI BUS
(Data / State In)
DO / SO / CO BUS
(Data / State / select-Code Out)
Alphanumeric LED
Display
Keyboard
@ Channel 16
& Select Code 12
Tape Drive
@ Select Code 10
9866 Printer
Interface
@ Select Code 15
Beeper
@ Channel 2
Display Enable
FF
@ Channel 8
Control Enable
FF
@ Channel 0/1
I/O Register - 16 bits
8+4
8+4+4
@ Various Select Codes
External I/O Slots
Service
Inhibit FF
Single
Service FF
CEO
CFI
SI0
SIH
SSI
CEO
Channel Devices
Select-Code Devices
QRD
FF
ALU
KLS
DEN
Interrupt
Control
A / B Select
FF
4
4

1
3
U12-11
2
4
6
U12-11
1K
1.8K
5
1K
1.8K
1K
?
8.000 MHz
N12B.C3
10
8
U12-11
9
1K
N12A.J
13
11
U12-11
12
2
3
U12-5
1
N12A.F6
13
11
U12-5
12
15
D0
U12-14
74193
3
Q0
2
Q1
6
Q2
7
Q3
nLD
D1
10
D2
11
1
9
D3
R
5
CUp
4
CDp
14
12
TCU
13
TCD
1K
b
1K
c
b
4
nS
U12-6
74H74
5
Q
6
nQ
D
3
Cp
2
nR
1
b
10
nS
U12-6
74H74
9
Q
8
nQ
D
11
Cp
12
nR
13
b
4
6
U12-5
5
4
6
U12-2
5
13
11
U12-10
12
IOCK1
1K
N12A.8
12
U12-13
10
13
8
9
12
U12-12
10
9
8
13
N12A.N12
N12B.N12
N12A.M
4
U12-13
2
5
6
1
2
U12-12
1
5
6
4
N12A.15
10
8
U12-5
9
N12A.K9
1
U13-4
12
2
13
N13A.S
IQN
N13A.F
CC1
CC2
CC4
CC8
nINH
N13A.12
N13B.3
XTC
nIHC
N14A.15
N22A.K
(N02.7)
MCK
(N02.J)
N23A.8
N22A.7
N14A.9
N13A.K
SCK
1K
nCEM
QRD
IOCK2
nCCT
N14A.13
N13A.13
RCK
N13B.N12
IOCKT
N14A.16
N22A.L
N13A.M
nQN
CPU CLOCK & I/O
Assembly 12
HP 9830 Computer
Section: CPU Clock
Page: P1 Rendition: 2014 Dec 26
nCCO
nIPS
nMCK
MCK
nnMCK
N12A.B2
N11A.A1
B.R14
B.S15
22
15V
9 of
0.01

10
nS
U13-17
74108
6
Q
5
nQ
J
9
Cn
11
8
K
nR
12
13
nS
U13-17
74108
Q
3
nQ
J
(9)
Cn
4
1
K
nR
(12)
2
N12A.T16
N12A.V
N12A.18
N12A.U17
2
A5
U13-7
ROM4
3301
256*4
9
Y3
10
Y2
11
Y1
12
Y0
A4
A6
15
A7
14
E2
13
E1
3
1
6
A1
A0
A2
4
A3
5
7
2
D0a
U13-15
quad
2-in mux
4
Ya
7
Yb
9
Yc
12
Yd
S
1
3
D1a
5
D0b
6
D1b
11
D0c
10
D1c
14
D0d
13
D1d
nE
15
10
nS
U13-16
74108
6
Q
5
nQ
J
9
Cn
11
8
K
nR
12
13
nS
U13-16
74108
Q
3
nQ
J
(9)
Cn
4
1
K
nR
(12)
2
10
nS
U13-9
74108
6
Q
5
nQ
J
9
Cn
11
8
K
nR
12
13
nS
U13-8
74108
Q
3
nQ
J
(9)
Cn
4
1
K
nR
(12)
2
10
nS
U13-8
74108
6
Q
5
nQ
J
9
Cn
11
8
K
nR
12
13
nS
U13-9
74108
Q
3
nQ
J
(9)
Cn
4
1
K
nR
(12)
2
SA1
SA2
SA3
PA0
PA1
PA2
PA3
SA0
MICROCODE
BUS
2
A5
U13-6
ROM3
3301
256*4
9
Y3
10
Y2
11
Y1
12
Y0
A4
A6
15
A7
14
E2
13
E1
3
1
6
A1
A0
A2
4
A3
5
7
16
D15
U13-5
74150
16-in
mux
10
Y
A3
11
17
D14
18
D13
19
D12
20
D11
21
D10
22
D9
23
D8
nE
9
1
D7
2
D6
3
D5
4
D4
5
D3
6
D2
7
D1
8
D0
13
A2
14
A1
15
A0
9
CSn
U13-3
5495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
9
CSn
U13-12
5495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
9
CSn
U13-13
5495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
9
CSn
U13-14
5495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
C.H
TBUS
nTTQ
C.J
C.3
4 of
470
3
U13-4
6
4
5
12
11
U13-11
13
4 of
470
N13B.D
Q1
N13B.A
Q2
N13B.4
Q3
N13A.17
N13A.U
Q5
N13A.18
Q6
N13A.V
Q7
N13A.16
Q8
N13A.P
N13A.14
Q10
2
3
U13-11
1
8
9
U13-1
5
6
U13-11
4
10
11
U13-1
9
U13-4
8
10
11
10
8
U13-11
9
nQTR
Q11
nTQ6
N13A.C
RCK
nPOP
RCK
C.A
C.D
C.E
C.K
C.5
C.9
C.B
C.C
C.2
C.10
C.L
C.F
C.4
C.1
BRC
SCK
5
4
6
U14
-15
DC
BC
P0
N13B.C
N14B.C
N11B.6
Q0
N12A.P13
Q9
QNR
N11B.E
N11B.7
N11B.H
NT.F
N11B.5
Q4
N12B.2
N12A.S
QRDb
nUTR
nXTR
N14A.3
nQN
HP 9830 Computer
Section: CPU Microcode Sequencing
Page: P2 Rendition: 2014 Dec 26
nTQR
QMR
SM0
SM3
SM2
SM1
PA1
PA0
PA2
SA1
SA0
SA2
SA3
PM3
PM2
PM1
PM0
PM0
PM2
PM2
PM3
SM1
SM2
SM3
SM0
6
5
U13-1
4.7
10V
10 of
0.01
N13A.B2
N13A.A1
B.R14
B.S15
CPU MICROCODE ENGINE
Assembly 13

14
nBD
U13-18
74155
1-of-8
decoder
9
BY0
10
BY1
11
BY2
12
BY3
BD
3
A1
15
2
nAD
7
AY0
6
AY1
5
AY2
4
AY3
A0
nAD
13
1
2
A5
U13-19
ROM7
3301
256*4
9
Y3
10
Y2
11
Y1
12
Y0
A4
A6
15
A7
14
E2
13
E1
3
1
6
A1
A0
A2
4
A3
5
7
MICROCODE
BUS
4 of
470
14
nBD
U13-10
74155
1-of-8
decoder
9
BY0
10
BY1
11
BY2
12
BY3
BD
3
A1
15
2
nAD
7
AY0
6
AY1
5
AY2
4
AY3
A0
nAD
13
1
2
A5
U13-20
ROM8
3301
256*4
9
Y3
10
Y2
11
Y1
12
Y0
A4
A6
15
A7
14
E2
13
E1
3
1
6
A1
A0
A2
4
A3
5
7
4 of
470
2
A5
U13-21
ROM6
3301
256*4
9
Y3
10
Y2
11
Y1
12
Y0
A4
A6
15
A7
14
E2
13
E1
3
1
6
A1
A0
A2
4
A3
5
7
2
A5
U13-23
ROM9
3301
256*4
9
Y3
10
Y2
11
Y1
12
Y0
A4
A6
15
A7
14
E2
13
E1
3
1
6
A1
A0
A2
4
A3
5
7
N13A.H
nRDM
N13A.11
nQTR
nTQ6
N13A.5
nUTR
N13A.E
nPTR
N13A.6
nTRE
N13A.7
nWTM
N13A.3
nTTX
N13A.D
nTTP
nTTQ
N13A.15
nBCD
N13A.8
nTBE
N13B.B
IQN
N13B.1
AC0
N13B.8
AC1
N13A.L
nXTR
N13B.K
nTTM
N13B.9
nTTT
N13B.L
SC0
N13B.10
SC1
12
13
U13-1
2
1
U13-1
N13B.M
AC2
N13B.2
470
N13A.N
N13A.10
BRC
N14A.H
N14A.4
N14A.J
N14A.F
N14A.T
NT.6
33
10
8
U14-18
N14A.C
MCDIS
N14A.M
N14B.F
N12A.H7
12
11
U12-19
13
nOTx
nMIx
10
8
U12-10
9
N23A.W19
N23A.21
N23A.V
(N22A.X)
3 of
2.2K
N14A.L
N12A.L10
330
N14A.S
BCD
N14A.8
N14B.A
N14B.B
N14B.J
N14B.11
QAB
FPAB
N12B.7
N12B.H
N12B.F6
N12B.E5
2
A5
U13-22
ROM5
3301
256*4
9
Y3
10
Y2
11
Y1
12
Y0
A4
A6
15
A7
14
E2
13
E1
3
1
6
A1
A0
A2
4
A3
5
7
N13B.F
CC8
N13B.6
CC4
N13B.H
CC2
N13B.7
CC1
4 of
470
(N23A.7)
(N02.8)
(N22A.6)
(N23A.H)
(N02.1)
(N22A.H)
2
3
U83-7
12
13
U83-9
11
1
SC=01
N23A.M
SC0
SC1
(N02.A)
(N22A.M)
(N02.2)
MTS
HP 9830 Computer
Section: CPU Microcode Controls
Page: P3 Rendition: 2014 Dec 26
RC0
RC1
RC2
XC0
XC2
XC1
5
6
U83-7
4
10
8
U83-7
4
5
U83-9
6
9
TTS
SC1
SC0
SC=10
nTTS
9
NOP
ZTR
U13-2
74H101
6
Q
8
nQ
J
Cn
nR
5
13
2
1
4
3
U13-1
K
3
4
9
10
12
11
Q11
N13A.9
N13A.4
N14A.K
N14A.D
RCK
A/B Select
AB
nAB
CPU MICROCODE ENGINE
Assembly 13
T REGISTER
Assembly 83

6
13
12
11
U14
-15
13
12
11
2
1
3
U14
-15
2
U14-14
4
1
5
N14A.7
nTTX
470
nTRE
nTBE
nTTXT
n(LIx+MIx)
NT.A
N14A.10
9
CSn
U14-4
5495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
12
D0
U14-6
7491
13
Q7
14
nQ7
D0
11
Cp
9
9
CSn
U14-5
5495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
4
6
U14-17
5
13
11
U14-8
12
SCK
10
8
U14-8
9
A0
TBUS
TBUS
BCD1
BCD2
BCD3
nXTR
BCD
RCK
nUTR
ATR
HP 9830 Computer
Section: CPU Registers & T Control
Page: P4 Rendition: 2014 Dec 26
A Register
AB
nAB
nTTXENB
A1
A2
A3
NT.C
U14-16
10
8
9
U14-16
5
DS1
U14-9
9328
8-bit shift
register
3
Q7
2
nQ7
DS0
6
nR
1
4
S
9
Cp
7
Cp
12
DS1
U14-9
9328
8-bit shift
register
14
Q7
15
nQ7
DS0
11
nR
(1)
13
S
(9)
Cp
10
Cp
2
3
U14-17
1
SCK
9
10
8
U14
-15
5
4
6
2
3
1
TBUS
B0
BTR
B Register
U14-16
U14-16
3
9
CSn
U14-1
5495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
13
11
U14-7
12
9
U14-14
12
10
8
13
SCK
nTRE
2
3
U14-8
1
TBUS
T0
4
6
U14-8
5
5
6
U14-7
4
2
3
U14-7
1
nTBE
E0
ETR
10
13
12
10
11
TBUS
U83-2
8
2
1
T0
4
5
3
T0
9
9
8
4
5
6
nRDM
13
12
11
nWTM
TRI
nTTT
nTTT
nEDT
nEDT
TTS
13
12
11
U83-7
1
2
U83-9
10
9
U83-9
8
SCK
TSC
nTTT
nEDT
XIN
T Register Controls
E Register
nTTS
U83-1
U83-1
U83-1
N13A.T
5
DS1
U14-10
9328
8-bit shift
register
3
Q7
2
nQ7
DS0
6
nR
1
5
6
U14-18
4
4
S
9
Cp
7
Cp
12
DS1
U14-10
9328
8-bit shift
register
14
Q7
15
nQ7
DS0
11
nR
(1)
13
S
(9)
Cp
10
Cp
SCK
13
11
U14-18
12
nPTR
TBUS
P0
N14A.U
nTTP
P Register
10
8
U14-17
9
?
?V
9 of
0.01
N14A.B2
N14A.A1
B.R14
B.S15
CPU REGISTERS & ALU
Assembly 14
T REGISTER
Assembly 83

N13B.J
N13B.11
2
A5
U14-11
ROM2
3601
256*4
9
Y3
10
Y2
11
Y1
12
Y0
A4
A6
15
A7
14
E2
13
E1
3
1
6
A1
A0
A2
4
A3
5
7
4 of
1K
2
A5
U14-19
ROM1
3601
256*4
9
Y3
10
Y2
11
Y1
12
Y0
A4
A6
15
A7
14
E2
13
E1
3
1
6
A1
A0
A2
4
A3
5
7
3 of
1K
AC0
1
3
U14-20
2
330
12
11
U14-20
13
330
T2
AC1
T3
N14B.H7
330
10
nS
U14-12
7474
9
Q
8
nQ
D
11
Cp
12
nR
13
4
nS
U14-12
7474
5
Q
6
nQ
D
3
Cp
2
nR
1
9
8
U14-20
10
5
6
U14-20
4
330
N14B.8
DC
N14B.M
BC
9
8
U14-13
10
1
3
U14-13
2
13
11
U14-13
12
5
6
U14-13
4
SCK
470
N14A.14
N23A.J
N22A.J
N11A.5
TBUS
MCDIS
NT.1
N13A.R
BCD1
BCD2
BCD3
nBCD
BCD
BCD
BCD
BCD
T1
AC2
10
9
2
3
M0
T0
U83-8
8
13
1
nDO0
6
5
4
N23A.U
SC1
TTS
SC0
MTS
LIx+MIx
QAB
RCK
SCB
nUTR
HP 9830 Computer
Section: CPU ALU
Page: P5 Rendition: 2014 Dec 26
SBUS
RBUS
9
10
3
2
BTR
U14-3
8
1
13
5
4
3
ATR
B0
2
1
Q0
13
12
E0
ETR
11
10
9
U14-2
11
12
8
6
6
4
5
13
11
U14-17
12
2
3
U14-18
1
10
8
U14-7
9
P0
A0
nQTR
nPTR
nUTR
A1
A2
A3
CARRY
Binary Carry
BCD Carry
BCD ALU
Extension
Binary ALU
UTS
CPU REGISTERS & ALU
Assembly 14
T REGISTER
Assembly 83

9
CSn
U82-8
7495
shift
register
2
D0
13
Q0
3
D1
12
Q1
4
D2
11
Q2
5
D3
10
Q3
SI
CPn
6
S/P
1
8
N22C.7
M15
N22C.8
M14
N22C.9
M13
N22C.10
M12
9
CSn
U82-9
7495
shift
register
2
D0
13
Q0
3
D1
12
Q1
4
D2
11
Q2
5
D3
10
Q3
SI
CPn
6
S/P
1
8
N22C.11
M11
N22C.12
M10
N22C.13
M9
N22C.14
M8
9
CSn
U82-10
7495
shift
register
2
D0
13
Q0
3
D1
12
Q1
4
D2
11
Q2
5
D3
10
Q3
SI
CPn
6
S/P
1
8
N22C.15
M7
N22C.16
M6
N22C.17
M5
N22C.18
M4
9
CSn
U82-11
7495
shift
register
2
D0
13
Q0
3
D1
12
Q1
4
D2
11
Q2
5
D3
10
Q3
SI
CPn
6
S/P
1
8
N22C.19
M3
N22C.20
M2
N22C.21
M1
N22C.22
M0
12
13
U82-31
6
5
U82-31
5
4
U82-27
6
10
9
U82-27
8
MAC
10
9
U82-4
8
N22A.H
nRDM
N22A.6
nWTM
N22A.AA
M15
8
9
U82-26
N22A.X
nTTM
N22A.7
SCK
10
11
U82-19
M13
nM13
N22A.M
MTS
N22A.J
TBUS
N22A.23
M0
SCK
2
1
U82-12
3
12
13
U82-26
4
3
U82-26
13
U82-5
12
2
1
11
U82-5
8
10
9
nWTM
nRDM
N22A.20
2
nS
U82-1
74106
15
Q
14
nQ
J
1
Cn
4
16
K
nR
3
7
nS
U82-1
Q
10
nQ
J
6
Cn
9
12
K
nR
8
2
nS
U82-2
74H106
Q
14
nQ
J
1
Cn
4
16
K
nR
3
10
nS
U82-3
74H74
9
Q
8
nQ
D
11
Cp
12
nR
13
12
13
11
U82-13
10
8
U82-13
9
10
9
U82
-15
8
13
5
U82-14
6
4
3
1
2
U82-14
12
1
13
4
6
U82-12
5
2
1
3
U82-24
5
6
U82-24
4
10
9
U82-12
8
12
13
U82
-6
11
10
9
U82
-6
8
nWTM
REF
nMCB
13
11
U82-25
12
2
3
U82-25
1
4
6
U82-25
5
9
10
8
U82-24
13
11
U82-24
12
nMCB
MCP
nMCA
nMCA
MCP
MCB
MCA
MCC
nMCA
MCA
nMCC
nREF
nMCP
nMCP
nMCB
MCP
MCC
MCP
nMCC
nMCP
MCP
11
15
MCP
nMCP
MCA
nMCA
MCB
nMCB
MCC
nMCC
N22A.19
nREF
10
11
U82-26
nCCT
nCCT
N22A.L
7
nS
U82-2
Q
10
nQ
J
6
Cn
9
12
K
nR
8
AEN
11
nCEM
12
13
U82-4
11
N22A.Z
13
12
U82-27
11
AEN
MCA
RWT
N22B.3
2
1
3
U82-27
13
11
U82-12
12
MCA
MCB
nWTM
N22A.18
TPC
6
5
U82-26
MCC
9
8
U82-25
10
nEMB
SCK
AEN
N22C.1
MCC
1.2K
2 of
6.8
35V
8 of
0.01
MEN
MCA
nCCT
M15
M0
2
1
U82-26
MCK
nMCK(22)
N22A.K
N23A.AA
(N02.3)
HP 9830 Computer
Section: M Register & Memory Cycle Gen.
Page: M1 Rendition: 2014 Dec 26
N12A.11
NT.B
MAC
N22A.B2
N22A.A1
A.BB24
B.A1
B.Z22
N22B.B2
V+12
V+12
N22B.M11
V+16
V+16
Symbol scoping limit
M REGISTER
Assembly 82
5
6
U82-13
4
1
3
U82-13
2
N22A.21
N23A.Y
1
3
nRDM
TMC
U83-1
2
MSTL

8
9
18K
4
3
U03-3
6
5
U03-3
NRC.U
NRC.K
NRC.T
NRC.J
NRC.15
NRC.6
NRC.11
NRC.F
NRC.3
NRC.8
NRC.D
NRC.L
NRC.4
NRC.10
NRC.5
NRC.M
N03.17
N03.10
N03.16
N03.8
N03.15
N03.5
N03.14
N03.6
N03.2
N03.9
N03.3
N03.11
N03.4
N03.12
N03.7
N03.13
N26.B
N26.C
N26.D
N26.E
N26.F
N26.H
N26.J
N26.K
N26.L
N26.M
N26.N
N26.P
N26.R
N26.S
N26.T
N26.U
nMR0
nMR15
U03-3
5 U03-2 6
11 U03-3 10
1 U03-2 2
1 U03-3 2
13 U03-1 12
13 U03-3 12
11 U03-1 10
1 U03-1 2
3 U03-2 4
5 U03-1 6
13 U03-2 12
3 U03-1 4
11 U03-2 10
9 U03-1 8
9 U03-2 8
N21B.E
nMR0
nMR15
N21B.F
N21B.H
N21B.J
N21B.K
N21B.L
N21B.N
N21B.P
N21B.R
N21B.S
N21B.T
N21B.U
N21B.V
N21B.W
N21B.X
N21B.Y
nMR0
nMR15
nMRC0
nMRC15
N24B.B
nMR0
nMR15
ROM CARTRIDGES
ROM CARDS
Assemblies 26
BASIC ROM
Assembly 21
4KW RAM
Assemblies 84
N24B.C
N24B.D
N24B.E
N24B.F
N24B.H
N24B.J
N24B.K
N24B.L
N24B.M
N24B.N
N24B.P
N24B.R
N24B.S
N24B.T
N24B.U
6
5
U83-13
16 of
2.2K
4
3
U83-13
2
1
U83-13
8
9
U83-13
2
1
U83-10
4
3
U83-10
6
5
U83-10
12
13
U83-10
9
CSn
U83-3
7495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
10
11
U83-13
12
13
U83-13
6
5
U83-14
4
3
U83-14
10
11
U83-10
8
9
U83-10
2
1
U83-11
4
3
U83-11
9
CSn
U83-4
7495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
2
1
U83-14
8
9
U83-14
10
11
U83-14
12
13
U83-14
6
5
U83-11
12
13
U83-11
10
11
U83-11
8
9
U83-11
9
CSn
U83-5
7495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
6
5
U83-15
4
3
U83-15
2
1
U83-15
12
13
U83-15
8
9
U83-12
10
11
U83-12
12
13
U83-12
2
1
U83-12
9
CSn
U83-6
7495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
N23B.E
nMR0
nMR15
N23B.F
N23B.H
N23B.J
N23B.K
N23B.L
N23B.N
N23B.P
N23B.R
N23B.S
N23B.T
N23B.U
N23B.V
N23B.W
N23B.X
N23B.Y
N23C.1
N23C.5
N23C.6
N23C.9
N23C.2
N23C.4
N23C.7
N23C.8
N23C.10
N23C.13
N23C.15
N23C.14
N23C.19
N23C.22
N23C.18
N23C.17
N23A.11
nMW0
nMW15
N23A.12
N23A.13
N23A.14
N23A.15
N23A.16
N23A.17
N23A.18
N23B.14
N23B.15
N23B.16
N23B.17
N23B.18
N23B.19
N23B.20
N23B.21
T3
N23A.X
N23A.T
N23A.S
N23A.F6
T2
T1
T0
N24A.11
nMW0
nMW15
4KW RAM
Assemblies 84
N23B.4
N24A.12
N24A.13
N24A.14
N24A.15
N24A.16
N24A.17
N24A.18
N24B.10
N24B.11
N24B.12
N24B.13
N24B.14
N24B.15
N24B.16
N24B.17
TRI
TSC
TMC
TPC
T0
4
3
U83-12
6
5
U83-12
8
9
U83-15
10
11
U83-15
5 of
0.02
6.8
HP 9830 Computer
Section: T Register & Mem R/W Busses
Page: M2 Rendition: 2014 Dec 26
N14B.L10
N14B.5
N14B.1
N14A.E
(N02.6)
N23A.B2
N23A.A1BB24
B.A1Z22
T REGISTER
Assembly 83
ROM CARTRIDGE BUS
Assembly 03

N22B.13
22
B2
U82-32
74154
1-of-16
decoder
1
Y0
2
Y1
3
Y2
4
Y3
5
Y4
6
Y5
7
Y6
8
Y7
9
Y8
10
Y9
B1
B4
20
B8
N22A.3
M9
11
Y10
13
Y11
14
Y12
15
Y13
16
Y14
17
Y15
M10
M11
M12
N22A.C
N22A.D
N22A.4
N22A.E
N22A.5
N22B.14
N22B.15
N22B.16
N22B.17
N22B.18
N22B.21
N22B.20
N22B.19
N22B.12
18
E2
19
E1
nROMB00
nROMB01
nROMB02
nROMB03
nROMB04
nROMB05
nROMB06
nROMB07
nROMB14
nROMB15
nROMB10
nROMB11
nROMB12
nROMB13
23
21
4
3
U82-31
1.2K
V+16
V+12
N22B.J
N22B.H
N22B.F
N22B.K
N22B.E
5
4
U82-18
6
N22B.L
nAROM
8
9
U82-19
5
4
U82-30
6
5
4
U82
-6
6
M14
M13
nRSB1A
1
2
U82
-6
3
M9
nRAMB0A
M8
nRSB1
9 U82-31 8
NRCc-18
NRCc-17
NRCb-18
NRCb-17
NRCa-18
NRCa-17
NRCd-18
NRCd-17
NRCe-18
NRCe-17
ROM CARTRIDGES
2
1
U25-5
N25.7
N25.C
N25.8
N25.9
N25.10
4-404
V+12
V+12
3.3K
N25.4
N25.D
N25.5
N25.E
N25.H
N25.J
N25.K
N25.F
N25.L
N25.M
N25.N
N25.BB
N25.AA
N25.24
N25.23
N25.6
nM13
N25.11
N26b-4
N26b-5
N26c-4
N26c-5
N26d-4
N26d-5
ROMB20
ROMB21
ROMB22
ROMB23
ROMB24
ROMB25
ROMB26
ROMB27
ROMB30
ROMB31
ROMB32
ROMB33
ROMB34
ROMB35
ROMB36
ROMB37
N03.X
N03.Y
N03.V
N03.W
N03.Z
N03.U
N03.21
N03.19
N03.22
N03.20
3 U25-5 4
5 U25-5 6
13 U25-5 12
11 U25-5 10
9 U25-5 8
1 U25-4 2
3 U25-4 4
5 U25-4 6
13 U25-4 12
11 U25-4 10
9 U25-4 8
5 U25-3 6
3 U25-3 4
1 U25-3 2
9 U25-3 8
N26a-4
ROMB16
N26a-5
ROMB17
N21A.H7
N21A.J8
N21A.K9
N21A.F6
N21A.L10
N21A.E5
N21B.B9
N21B.10
N21B.Z
N21B.22
N21B.AA
N21B.24
N21B.BB
N21B.23
22
B2
U25-6
74154
1-of-16
decoder
1
Y0
2
Y1
3
Y2
4
Y3
5
Y4
6
Y5
7
Y6
8
Y7
9
Y8
10
Y9
B1
B4
20
B8
11
Y10
13
Y11
14
Y12
15
Y13
16
Y14
17
Y15
19
E1
18
E2
23
21
ROM CARDS
Assemblies 26
BASIC ROM
Assembly 21
ROM CARTRIDGE BUS
Assembly 03
ROM BUFFER
Assembly 25
AEN
HP 9830 Computer
Section: ROM Bank Selection
Page: M3 Rendition: 2014 Dec 26
N25.B2
N25.A1
CC25
N25.3
V+12
V+12
N03.M
N03.NP
NRC.R14
NRC.N12
N03.L
NRC.9
V–12
V–12
M REGISTER
Assembly 82

2
1
U82-33
3
5
4
U82-33
6
13
12
U82-33
11
10
9
U82-33
8
2
1
3
5
4
6
13
12
11
10
9
8
U82-34
U82-34
U82-34
U82-34
9
10
U82-18
8
12
13
U82-19
1
2
U82-30
3
N22B.R
nROMA7
N22B.S
nROMA6
N22B.T
nROMA5
N22B.U
nROMA4
N22B.V
nROMA3
N22B.W
nROMA2
N22B.X
nROMA1
N22B.Y
nROMA0
N22B.P
ROMA8
N22B.D
2
1
U82-31
1.2K
V+16
V+12
N22B.C
2
1
U82-19
M7
M6
M5
M4
M3
M2
M1
M0
M8
nRDM
10
U82-14
8
9
11
nRAMB0A
N22B.N
NRC.2
N26.3
nMAC
N03.C
NRC.A
NRC.16
NRC.B
NRC.H
NRC.13
NRC.E
NRC.P
NRC.C
NRC.S
NRC.1
2
1
U25-1
12
13
U25-3
10
11
U25-3
N25.S
N25.T
N25.U
N25.V
N25.W
N25.X
N25.Y
N25.Z
N25.P
N25.R
N25.15
N25.16
N25.17
N25.18
N25.19
N25.20
N25.21
N25.22
N25.13
N25.14
220
N26.8
N26.9
N26.10
N26.11
N26.12
N26.13
N26.14
N26.15
N26.16
N26.17
nROMnA8b
N03.B
N03.K
N03.R
N03.E
N03.S
N03.D
N03.T
N03.A
N03.1
N03.18
3 U25-1 4
5 U25-1 6
9 U25-1 8
1 U25-2 2
3 U25-2 4
5 U25-2 6
9 U25-2 8
N21B.12
N21B.13
N21B.14
N21B.15
N21B.16
N21B.17
N21B.18
N21B.19
N21B.20
N21B.21
ROM CARTRIDGES
ROM CARDS
Assemblies 26
BASIC ROM
Assembly 21
MAC
N21B.D4
220
220
ROMnA8
M REGISTER
Assembly 82
ROM CARTRIDGE BUS
Assembly 03
ROM BUFFER
Assembly 25
nROMA7b
nROMA6b
nROMA5b
nROMA4b
nROMA3b
nROMA2b
nROMA1b
nROMA0b
nROMA8b
MAC
HP 9830 Computer
Section: ROM Addressing
Page: M4 Rendition: 2014 Dec 26

U21-0L
N21B.12
N21B.Y
N21B.X
N21B.W
N21B.V
N21B.U
N21B.T
N21B.S
N21B.R
N21B.P
N21B.N
N21B.L
N21B.K
N21B.J8
N21B.H7
N21B.F6
N21B.E5
U21-0U
12
13
11
14
22
3
21
4
S1
23
nS2
10
20
N21B.13
N21B.14
N21B.15
N21B.16
N21B.17
N21B.18
N21B.19
N21B.20
nA0
nA1
nA2
nA3
nA4
nA5
nA6
nA7
nA8
A8
5
nA1
nA2
nA3
nA4
nA5
nA6
nA7
nA0
nA8
A8
N21B.21
N21.D4
1
2
15
V–b
12
13
11
14
22
3
21
4
23
10
20
5
1
2
15
V–b
nD13
nD14
nD15
nD12
nD9
nD10
nD11
nD8
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q0
16
8
17
7
18
6
19
9
N21B.BB
N21B.24
N21B.AA
N21B.22
N21B.Z
N21B.10
N21B.9
N21A.5
N21A.10
N21A.6
N21B.23
N21A.9
N21A.8
N21A.7
3 U21-10 4
1 U21-10 2
13 U21-9 12
11 U21-9 10
9 U21-9 8
5 U21-9 6
3 U21-9 4
1 U21-9 2
10
11
U21-4
8
9
U21-3
10
11
U21-3
9 U21-4 8
1 U21-5 2
3 U21-5 4
5 U21-5 6
13 U21-5 12
11 U21-5 10
9 U21-5 8
2.2
20V
2.2
20V
V+16
8
9
U21-1
1.2K
V+16
V+12
100
nMAC
U21-1L
U21-2L
U21-3L
U21-4L
U21-5L
U21-6L
U21-7L
U21-
10L
U21-
11L
U21-
12L
U21-
13L
U21-
14L
U21-
15L
U21-1U
U21-2U
U21-3U
U21-4U
U21-5U
U21-6U
U21-7U
U21-
10U
U21-
11U
U21-
12U
U21-
13U
U21-
14U
U21-
15U
1.2K
V+16
V+12
12
13
U21-3
330
4
3
U21-4
1 U21-4 2
13 U21-7 12
11 U21-7 10
9 U21-7 8
1 U21-7 2
3 U21-7 4
5 U21-7 6
3 U21-6 4
5 U21-6 6
13 U21-6 12
11 U21-6 10
9 U21-6 8
13 U21-8 12
11 U21-8 10
1 U21-6 2
nD5
nD6
nD7
nD4
nD1
nD2
nD3
nD0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q0
16
8
17
7
18
6
19
9
1 U21-8 2
3 U21-8 4
5 U21-8 6
13 U21-10 12
11 U21-10 10
9 U21-10 8
5 U21-10 6
9 U21-8 8
nMAC
U21-1
5 6
U21-1
3 4
U21-1
11 10
U21-1
1 2
U21-1
13 12
U21-3
1 2
U21-3
3 4
U21-2
9 8
U21-2
5 6
U21-2
11 10
U21-2
1 2
U21-2
13 12
U21-2
3 4
nROMB15
nROMB14
nROMB13
nROMB12
nROMB11
nROMB10
nROMB07
nROMB06
nROMB05
nROMB04
nROMB03
nROMB02
nROMB01
nROMB00
nMR13
nMR14
nMR15
nMR12
nMR9
nMR10
nMR11
nMR8
nMR5
nMR6
nMR7
nMR4
nMR1
nMR2
nMR3
nMR0
MAC
6
5
U21-3
6
5
U21-4
12
13
U21-4
nROMA1
nROMA2
nROMA3
nROMA4
nROMA5
nROMA6
nROMA7
nROMA0
ROMA8
ROMnA8
330
330
512•8
ROMS
S1
nS2
HP 9830 Computer
Section: Basic ROM
Page: M5 Rendition: 2014 Dec 26
N21A.C3
D4
N21A.A1B2
B.A1CC25
N21B.B2
V+12
V+12
N21B.M11
V+16
V+16
1K
200
V–b
2.2
20V
N21B.C3
V–12
BASIC ROM
Assembly 21
nA0
nA1
nA2
nA3
nA4
nA5
nA6
nA7
nA8
A8
nA1
nA2
nA3
nA4
nA5
nA6
nA7
nA0
nA8
A8

N26.8
2
1
10
11
U26-3
12
13
U26-3
23
nD5
nD6
nD7
nD4
nD1
nD2
nD3
nD0
nD13
nD14
nD15
nD12
nD9
nD10
nD11
nD8
12
13
11
14
22
3
21
4
23
10
20
N26.9
N26.10
N26.11
N26.12
N26.13
N26.14
N26.15
N26.16
N26.5
N26.4
nA0
nA1
nA2
nA3
nA4
nA5
nA6
nA7
nA8
5
nA1
nA2
nA3
nA4
nA5
nA6
nA7
nA0
nA8
A8
N26.17
N26.3
U26-1
3 U26-1 4
5 U26-1 6
13 U26-1 12
11 U26-1 10
9 U26-1 8
1 U26-2 2
3 U26-2 4
5 U26-3 6
3 U26-3 4
1 U26-3 2
9 U26-2 8
11 U26-2 10
13 U26-2 12
5 U26-2 6
nD5
nD6
nD7
nD4
nD1
nD2
nD3
nD0
nD13
nD14
nD15
nD12
nD9
nD10
nD11
nD8
12
13
11
14
22
3
21
4
10
20
5
nA1
nA2
nA3
nA4
nA5
nA6
nA7
nA0
nA8
A8
1
2
15
V–b
U26-4U
U26-5U
U26-4L
U26-5L
4990
1000
V–b
2.2
20V
2.2
20V
1
2
15
V–b
N26.U
N26.T
N26.S
N26.R
N26.P
N26.N
N26.M
N26.L
N26.K
N26.J
N26.H
N26.F
N26.E
N26.D
N26.C
N26.B
16
8
17
7
18
6
19
9
16
8
17
7
18
6
19
9
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q0
23
12
13
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q0
11
14
22
3
21
4
23
10
20
5
12
13
11
14
22
3
21
4
10
20
5
1
2
15
V–b
1
2
15
V–b
nA1
nA2
nA3
nA4
nA5
nA6
nA7
nA0
nA8
A8
nA1
nA2
nA3
nA4
nA5
nA6
nA7
nA0
nA8
A8
16
8
17
7
18
6
19
9
16
8
17
7
18
6
19
9
nMR5
nMR6
nMR7
nMR4
nMR1
nMR2
nMR3
nMR0
nMR13
nMR14
nMR15
nMR12
nMR9
nMR10
nMR11
nMR8
nMAC
nMAC
nMAC
ROMB<hi>
ROMB<lo>
nMAC
nMAC
nROMA1b
nROMA2b
nROMA3b
nROMA4b
nROMA5b
nROMA6b
nROMA7b
nROMA0b
nROMA8b
nROMnA8b
9 U26-3 8
S1
nS2
A8
HP 9830 Computer
Section: ROM Cards & Cartridges
Page: M6 Rendition: 2014 Dec 26
N26.A1
N26.V18
N26.2
V–12
CARD ROM
Assemblies 26
nA0
nA1
nA2
nA3
nA4
nA5
nA6
nA7
nA8
S1
nS2
A8
nA0
nA1
nA2
nA3
nA4
nA5
nA6
nA7
nA8
S1
nS2
A8
nA0
nA1
nA2
nA3
nA4
nA5
nA6
nA7
nA8
S1
nS2
A8
NRC.A
NRC.16
NRC.B
NRC.H
NRC.13
NRC.E
NRC.P
NRC.2
NRC.S
NRC.17
NRC.18
NRC.1
NRC.2
NRC.M
NRC.5
NRC.10
NRC.4
NRC.L
NRC.D
NRC.8
NRC.3
NRC.F
NRC.11
NRC.6
NRC.15
NRC.J
NRC.T
NRC.K
NRC.U
nMRC5
nMRC6
nMRC7
nMRC4
nMRC1
nMRC2
nMRC3
nMRC0
nMRC13
nMRC14
nMRC15
nMRC12
nMRC9
nMRC10
nMRC11
nMRC8
nMAC
ROMB<hi>
ROMB<lo>
nROMA1b
nROMA2b
nROMA3b
nROMA4b
nROMA5b
nROMA6b
nROMA7b
nROMA0b
nROMA8b
nROMnA8b
NRC.R14
NRC.N12
NRC.9
V–12
CARTRIDGE ROM
Assemblies ?
Cartridge disassembly required for detail.
Presumably identical to Card ROM but
without the data buffers.

3
2
U82
-22
6
5
4
N22A.9
10
9
U82
-22
8
1
13
N22A.10
3
2
U82
-15
6
5
4
N22A.8
3
2
U82
-23
6
5
4
N22A.11
10
9
U82
-23
8
1
13
N22A.12
M4
M3
M2
M1
M0
3
D0
U82-21
74161
binary
counter
14
Q0
13
Q1
12
Q2
11
Q3
CEP
D1
5
D2
7
4
6
D3
R
nPE
2
Cp
9
10
CET
1
15
TC
7
nS
U82-20
74106
11
Q
10
nQ
J
6
Cn
9
12
K
nR
8
6
5
U82-19
14
nBD
U82-17
74155
dual 1-of-4
decoder
BY2
BY3
nBD
3
S1
15
2
AD
5
4
S0
nAD
13
1
4
5
6
1
2
3
U82-28
U82-28
M12
M11
M10
5
U82-5
6
3
4
M14
nM13
N22A.P
N22A.N
12
13
U82-18
1
2
U82-18
11
3
4
nS
U82-3
74H74
5
Q
6
nQ
D
3
Cp
2
nR
1
5
4
6
1
2
3
U82-4
U82-4
4
3
U82-19
N22C.3
12
13
U82-30
11
N22A.14
nRSB1A
M9
9
10
U82-30
8
N22A.13
M8
nREF
N22A.17
M7
N22A.16
M6
N22A.15
M5
nRSB1A
N22A.22
1.2K
MCC
AEN
nRAMB0A
nRSB1
RAMB6
RAMB7
4KW RAM
Assemblies 84
2
U82-16
4
5
1
6
N22B.10
RAMRf
N24Af.F6
N24Af.E5
N24Bf.2
RAMA7
RAMA6
RAMA5
nRAMA4
nRAMA3
nRAMA2
nRAMA1
nRAMA0
RAMA8
N24.R
N24.V
N24.U
N24.T
N24.M
N24.L
N24.P
N24.N
N24.K
RAMA9
N24.S
4KW RAM
Assemblies 84
2
nS
U82-20
74106
15
Q
14
nQ
J
1
Cn
4
16
K
nR
3
nREF
REF
N22A.F
10
11
U82-31
nMCK(22)
nCCT
nINH
N22C.4
N22C.2
N22B.7
HP 9830 Computer
Section: RAM Addressing
Page: M7 Rendition: 2014 Dec 26
N12A.D
12
11
10
9
AY3
AY2
AY1
AY0
1
2
U82-29
3
4
5
U82-29
6
12
13
U82-29
11
9
10
U82-29
8
N22A.T
N22A.U
N22A.V
N22A.W
12
U82-16
10
9
13
8
N22B.9
RAMB3
RAMB2
RAMB1
RAMB0
RAMRr
N24Ar.E5
N24Ar.F6
N24Ar.H7
N24Ar.J8
N24Br.2
BY0
7
9
10
8
U82-28
N22A.S
RAMB4
N24Af.J8
BY1
6
12
13
11
U82-28
N22A.R
RAMB5
N24Af.H7
nREFDLY
M REGISTER
Assembly 82
REFA4
U82-7
9601
820µS
8
Q
6
nQ
Tn
2
Tn
1
3
Tp
Tp
4
11
13
24.8K
0.1
N22B.8

N24A.12
nMW14
WD14
N24A.R
N24A.V
N24A.U
N24A.T
N24A.M
N24A.L
N24A.P
N24A.N
N24A.K
N24A.11
6
13
9
7
8
15
1
2
5
18
4
A0R
A1R
A2R
A3R
A4R
A5C
A6C
A7C
A8C
3
A3
A1
A0
A4
A7
A6
A8
A2
A9
A5
17
11
nRD15
nRD
14
N24A.8
20
163
(m)
V+s
3 of
2.2
20V
2.2
20V
3 of
47
20V
V+16
U84-015
1103
1K•1
DRAM
16 of
237
RAMB0/4
nMW15
8
9
U84-4
10
11
U84-5
nRAMA1
nRAMA2
nRAMA3
nRAMA4
RAMA5
RAMA6
RAMA7
nRAMA0
RAMA8
nPC
R/nW
A9C
16
nCE
WD
12
Vss
Vdd
10
Vbb
V+16
V+19.5
nRD14
nRD13
nRD12
nRD11
nRD10
nRD9
nRD8
nRD7
nRD6
nRD5
nRD4
nRD3
nRD2
nRD1
nRD0
5
U84-1
2
4
3
(5)
7
11
U84-1
10
12
13
7
6
5
4
3
8
9
11
12
13
14
15
16
18
2
7
6
5
4
3
8
9
11
U84-9
3208
12
13
14
15
16
18
2
7
6
5
4
3
10
8
S1
S2
S3
S4
9
O6
11
nE456
S6
S5
17
nE123
O5
12
O4
13
O3
14
O2
15
O1
16
18
2
4
3
U84-6
2.6K
V+16
WD15
N24A.13
nMW13
WD13
N24A.14
nMW12
WD12
N24A.15
nMW11
WD11
N24A.16
nMW10
WD10
N24A.17
nMW9
WD9
N24A.18
nMW8
WD8
N24B.10
nMW7
WD7
N24B.11
nMW6
WD6
N24B.12
nMW5
WD5
N24B.13
nMW4
WD4
N24B.14
nMW3
WD3
N24B.15
nMW2
WD2
N24B.16
nMW1
WD1
N24B.17
nMW0
WD0
5 U84-6 6
1 U84-6 2
13 U84-6 12
9 U84-6 8
11 U84-6 10
9 U84-8 8
11 U84-8 10
1 U84-8 2
13 U84-8 12
11 U84-10 10
13 U84-10 12
9 U84-10 8
5 U84-10 6
3 U84-10 4
1 U84-10 2
WD15
WD14
WD13
WD12
WD11
WD10
WD9
WD8
WD7
WD6
WD5
WD4
WD3
WD2
WD1
WD0
10
11
U84-4
4-404
V+16
V+16
1.2K
13 U84-4 12
1 U84-4 2
3 U84-4 4
5 U84-4 6
5 U84-5 6
9 U84-5 8
3 U84-5 4
1 U84-5 2
13 U84-5 12
N24A.S
RAMA9
A0
R16
A3
A4
A1
A2
A7
A8
A9
A0
A5
A6
A5
R25
A9
R32
A8
R27
A7
R26
A2
R24
A1
R15
A4
R19
A3
R23
A6
R30
10
V+s
V+s
V+s
nMR15
nMR14
nMR13
nMR12
N24B.B
N24B.C
N24B.D
N24B.E
N24B.F
nMR11
nMR10
nMR9
nMR8
nMR7
nMR6
N24B.H
N24B.J
N24B.K
N24B.L
N24B.M
N24B.N
nMR5
nMR4
nMR3
nMR2
nMR1
nMR0
N24B.P
N24B.R
N24B.S
N24B.T
N24B.U
0.01
nRD15
nRD14
nRD13
nRD12
nRD11
nRD10
nRD9
nRD8
nRD7
nRD6
nRD5
nRD4
nRD3
nRD2
nRD1
nRD0
N24B.D4
RAMRr/f
V+19.5
U84-1
(4)
6
MAC
MCA
RWT
5
U84-2
2
4
3
(5)
7
14
U84-1
15
(12)
(13)
U84-2
(4)
6
10
10
10
10
10
10
12
U84-2
15
13
14
(12)
10
6
U84-3
7
4
5
U84-2
(13)
11
12
U84-3
15
13
14
(12)
10
3
U84-3
2
(4)
(5)
U84-3
(13)
11
4-009
V+16
V+16
10K
10
2K
V–12
10
10
10
10
10
N24A.7
RAMB1/5
N24A.6
RAMB2/6
N24A.5
RAMB3/7
N24A.Y21
N24A.X20
N24A.W19
12 of
2.2
20V
V+16
0.01
17 of
0.01
V+19.5
V+16
V+16
4
3
U84-8
6
5
U84-8
10
S1
S2
S3
S4
O6
nE456
S6
S5
17
nE123
O5
O4
O3
O2
O1
10
S1
S2
S3
S4
O6
nE456
S6
S5
17
nE123
O5
O4
O3
O2
O1
BANK 0
(UPPER)
BANK 1
(UPPER-
MIDDLE)
BANK 2
(LOWER-
MIDDLE)
BANK 3
(LOWER)
C-A
C-L
C-1
C-2
C-4
C-6
C-9
C-H
C-5
C-E
0.01
V+16
MCA
MAC
MAC
RWT
MCA
MAC
MAC
RWT
MCA
MAC
MAC
RWT
MCA
MAC
MAC
RWT
V+5
V+16
10K
2K
V–12
Q3/4-009
C-B
C-3
C-C
C-7
C-D
C-F
C-K
C-8
C-J
C-11
C-10
C-12
N24C.N
N24C.M
8
U84-1,2,3
3207
16
1
V+16
9
V+19.5
U84-7
3208
U84-11
3208
82pF
82pF
hex
MOS
Sense
Amps
HP 9830 Computer
Section: 4KW RAM Array
Page: M8 Rendition: 2014 Dec 26
N24A.B2
N24A.A1Z22
B.A1V18
N24B.6,7
V+16
V+16
N24B.8
V+19.5
V+19.5
N24A.D4
V–12
V–12
4KW RAM
Assemblies 84

c
c
c
c
N12B.J
STC
10
nS
U12-17
7474
9
Q
8
nQ
D
11
Cp
12
nR
13
4
nS
U12-16
7474
5
Q
6
nQ
D
3
Cp
2
nR
1
c
22
B2
U12-8
74154
1-of-16
decoder
1
Y0
2
Y1
3
Y2
4
Y3
5
Y4
6
Y5
7
Y6
8
Y7
9
Y8
10
Y9
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
Q
8
nQ
D
11
Cp
12
nR
13
4
nS
U12-17
7474
5
Q
6
nQ
D
3
Cp
2
nR
1
c
c
c
15
D0
U12-4
74193
3
Q0
2
Q1
6
Q2
7
Q3
nLD
D1
10
D2
11
1
9
D3
R
5
CUp
4
CDp
14
12
TCU
13
TCD
N12B.10
c
c
c
8
9
U12-18
3
2
U12-9
1
12
13
U12-18
2
3
U12-19
1
13
U12-3
12
1
2
N12B.M
5
6
U12-15
4
9
8
U12-15
10
5
6
U12-10
4
12
11
U12-15
13
1
3
U12-15
2
2
3
U12-10
1
470
IOCK1
nSFC
nSFS
nLIx
nOTx
nMIx
IOS0
6
5
U12-18
N12B.K
EOW
2
1
U12-18
N12B.8
6
5
U12-9
4
12
11
U12-9
13
N12B.L
4
6
U12-19
5
10
11
U12-18
8
9
U12-9
10
10
8
U12-19
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
Q0(11)
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
U11-3
2
U11-12
5
4
6
1
4
6
U11-4
5
nPOP
N11B.N
5
6
U11-11
4
9
8
U11-11
10
N11B.10
N11B.8
N11B.9
EOW
CLF
N11B.R
9
8
U11-1
10
N11A.8
6
5
U11-20
2
1
U11-20
Q0
10
11
U11-20
4
3
U11-3
Q0(11)
STF
2
1
U11-3
Q2
Q2
Q3
Q1
Q4
Q00000
N11B.L
Q1(11)
CLF
Q1(11)
N11A.3
DRC
Q5
Q6
Q7
Q8
U12-1
74H101
6
Q
8
nQ
J
Cn
nS
5
13
2
1
K
3
4
12
11
10
9
IOCK2
IOS0
QRD
10
8
U12-2
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

Single
Service
FF
8
9
U12-7
10
nOTx
N12A.3
N13B.E
9
CSn
U11-14
5495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
9
CSn
U11-15
5495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
9
CSn
U11-17
5495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
9
CSn
U11-18
5495
shift
register
13
Q0
12
Q1
11
Q2
10
Q3
SI
CPn
1
8
2
D0
3
D1
4
D2
5
D3
S/P
6
DO15/CO3
DO14/CO2
DO13/CO1
DO12/CO0
DO11/SO3
DO10/SO2
DO9/SO1
DO8/SO0
DO7
DO6
DO5
DO4
DO3
DO2
DO1
DO0
nSI3/nDI11
nSI2/nDI10
nSI1/nDI9
nSI0/nDI8
nDI7
nDI6
nDI5
nDI4
nDI3
nDI2
nDI1
nDI0
1
3
U11-16
2
9
12
11
U11-16
13
d
10
nS
U11-13
7474
9
Q
8
nQ
D
11
Cp
12
nR
13
4
nS
U11-13
7474
5
Q
6
nQ
D
3
Cp
2
nR
1
d
d
TBUS
5
6
U11-19
4
8
9
U11-20
N11B.12
nDO0
13
11
U11-1
12
nCEOb
5
6
U11-16
4
1
3
U11-2
2
5
6
U11-2
4
10
8
U11-2
9
1
U11-7
12
13
2
1
U11-6
12
2
13
12
11
U11-11
13
1
3
U11-11
2
11
U11-6
8
10
9
nDEN
13
11
U11-5
12
10
8
U11-5
9
5
6
U11-1
4
2
3
U11-4
1
12
13
U11-3
nSSI
nPOP
EOW
10
8
U11-10
9
STF
Q0(11)
N11B.M
QNR
nKSTOP
nSIH
EOW
13
11
U11-10
12
Q4
1
3
U11-10
2
4
6
U11-10
5
EOW
CLF
KLS
Q3
Q0(11)
2
3
U11-5
1
CLF
Q0(11)
4
6
U11-5
5
STC
n(CLF•Q0)
n(CLF•Q0)
n(STF•Q0)
n(STF•Q0)
n(CLF•Q0)
Q00000
Q00000
DRC
CLF
IOCKT
N11A.4
nCEO
nCFI
N23A.R
nSRA
0.01
HP 9830 Computer
Section: I/O Flags & Register, 9866 Interface
Page: F2 Rendition: 2014 Dec 26
4
U11-7
6
3
5
3
U11-6
6
5
4
nPOP
nSRA
Service
Inhibit
FF
Display
Enable
FF
SIH
Control Enable
Out FF
nQ00000
nQ00000
N01.1
N06.H
U02-4
7475
16
Q0
15
Q1
10
Q2
9
Q3
E01
4
2
D0
3
D1
6
D2
7
D3
E23
13
1
14
11
8
U02-5
7475
16
Q0
15
Q1
10
Q2
9
Q3
E01
4
2
D0
3
D1
6
D2
7
D3
E23
13
1
14
11
8
N01.B
N01.4
N01.3
N01.2
N01.D
N01.C
N01.E
N06.C
N06.L
N06.K
N06.J
N06.D
N06.E
N06.F
N06.V
N01.5,6
N01.A
N06.A
HP-9866
PRINTER
CONNECTOR
nPACK
GND
nPD6
nPD5
nPD3
nPD2
nPD1
nPD0
nPD4
nPSTB
4
nS
U02-3
7474
5
Q
6
nQ
D
3
Cp
2
nR
1
12
11
U02-2
13
8
9
U02-2
10
1
12
U02-1
10
13
8
9
2.2K
10
nS
U02-3
7474
9
Q
8
nQ
D
11
Cp
12
nR
13
3
2
U02-2
4
U02-1
5
1
6
2
2.2K
5
6
U02-2
4
DO6
DO5
DO4
DO3
DO2
DO1
DO0
nSI0
CO3
CO2
CO2
CO0
nCEOb
DRC
TTO
I/O Data
Register
I/O Control
Flags
9866 Printer
Interface
Tp
3
Tn
5
4
Tn
U11-8
74121
600nS
6
Q
nQ
10
11
4.42K
200pF
1
2.7K
d
?
15V
7 of
0.01
N11A.B2
N11A.A1
B.S15
CPU I/O
Assembly 11
EXTERNAL I/O BUS
Assembly 02
10
U11-7
8
9
11
8
10
U11-
16
9
8
10
U11-
19
2
3
1
U11-
1

N11A.H
N11A.J
N11A.K
N11A.L
N11A.M
N11A.N
N11A.P
N11A.R
N11A.S
N11A.T
N11A.U
N11A.V
N11B.A
N11B.B
N11B.C
N11B.D
N11A.E
N11B.P
300pF
N11A.D
N11B.J
N0X.C
N0X.CC
N0X.BB
N0X.23
N0X.X
N0X.W
N0X.V
N0X.U
N0X.T
N0X.S
N0X.R
N0X.P
N0X.11
N0X.12
N0X.N
N0X.9
EXTERNAL I/O
Slots
TAPE
DRIVE
N61A.3
N61A.C
N61A.4
N61A.D
N61A.5
N61A.E
N61A.6
N61A.F
N61A.7
N61A.H
N61A.8
N61A.J
N34.D
N34.5
N34.E
N34.6
N34.F
N34.7
N34.H
N34.8
KEYBOARD
N02.CC
N02.BB
N02.23
N02.X
N02.W
N02.V
N02.U
N02.T
N02.S
N02.R
N02.P
N02.11
N02.12
N02.N
N02.9
N0X.Z
EXTERNAL I/O
Slots
N0X.22
N0X.Y
N0X.21
N0X.20
N0X.19
N0X.18
N0X.17
N0X.16
N0X.15
N0X.14
N0X.13
N0X.M
N0X.L
N0X.10
N0X.K
N0X.7
N0X.8
N0X.J
N0X.2
N0X.3
N0X.1
N0X.6
N0X.A
N0X.AA
N0X.24
MCK
nWTM
SCK
MTS
M15
nRDM
T0
nTTM
nSIH
nCEOb
N23A.23
N23A.22
2.2K
nEDT
N02.7
N02.8
N02.J
N02.2
N02.3
N02.1
N02.6
N02.A
N02.AA
N02.24
N02.Z
N02.22
N02.Y
N02.21
N02.20
N02.19
N02.18
N02.17
N02.16
N02.15
N02.14
N02.13
N02.M
N02.L
N02.10
N02.K
N61A.L
N61A.10
N61A.K
N61A.9
N62.AA
N62.23
N62.Z
N62.22
N62.Y
N62.21
N62.X
N62.20
N62.W
N62.19
N62.V
N62.18
N61B.L
N61B.11
TAPE
DRIVE
CO3/DO15
CO2/DO14
CO1/DO13
CO0/DO12
SO3/DO11
SO2/DO10
SO1/DO9
SO0/DO8
DO7
DO6
DO5
DO4
DO3
DO2
DO1
DO0
N42.X
N42.20
N42.W
N42.19
N42.V
N42.18
N42.U
N42.17
N42.T
N42.16
N42.S
N42.15
N41.13
N41.P
N41.12
N41.N
DISPLAY
KEYBOARD
N34.3
XIN
nKSTOP
nCFI
nSSI
nDI11/nSI3
nDI10/nSI2
nDI9/nSI1
nDI8/nSI0
nDI7
nDI6
nDI5
nDI4
nDI3
nDI2
nDI1
nDI0
N34.10
N34.K
N34.9
N34.J
N61B.M
N61B.10
N34.C
N34.4
N02.C
N0X.F
N02.F
N22A.Y
nEMB
N02.B
N0X.B
nDEN
N42.3
KLS
N34.B
N11A.11
N11A.12
N11A.13
N11A.14
N11A.15
N11A.16
N11A.17
N11A.18
N11B.1
N11B.2.
N11B.3
N11B.4
N11A.7
N11A.6
N11A.F
HP 9830 Computer
Section: I/O Busses
Page: F3 Rendition: 2014 Dec 26
N02.E5
N02.D4,25
N0X.E5
N0X.D4,25
14 of
K
nSI0
DO6
DO5
DO4
DO3
DO2
DO1
DO0
nCEOb
CO3
CO2
CO1
CO0
EXTERNAL I/O BUS
Assembly 02
1.2K
CPU I/O
Assembly 11

0.02
220
a
820
nKSCANDET
KR7
10
11
U32-16
nKC1
10
11
U32-5
DO12
8
9
U32-5
DO15
N34.10
N32.20
N34.K
N32.21
DO14
DO13
N34.9
N32.22
N34.J
N32.Z
KDBENB
N32.Y
N34.C
nKSTOP
1K
4
3
U32-5
1K
nSIH
N34.3
N32.M
KLS
N34.B
N32.19
100pF
N32.X
N34.4
nSSI
U32-13
1
3
5
U32-13
4
6
10
U32-12
9
8
2
1
U32-16
8
9
U32-16
2
U32-6
1
3
STOP KEY
CONTROL
KEY
PRESSED
CONTROL
KEY DATA
CONTROL
4 of
0.02
47
6V
12
13
U32-5
2
1
U32-5
6
5
U32-5
274
0.018
14
12
U32-2
7490
÷2
Q
6
5
U32-16
KEYPRESSED
REPEAT
OSCILLATOR
SCAN CLOCK &
KEYPRESS DETECTION
N34.N12
N34.A1,M11
N32-AA23
N32-A1,BB24
N31.1
N31.15
22
N31.4
2
1
3
U32-15
13
12
11
U32-15
9
10
8
U32-15
9
10
8
U32-9
5
4
6
U32-15
13
12
11
U32-13
2
1
3
U32-12
12
13
11
U32-9
1
2
3
U32-9
9
10
8
U32-13
4
5
6
U32-6
KSCANCLK
10
9
8
U32-6
13
12
11
U32-6
10
nS
U32-14
7474
9
Q
8
nQ
D
11
Cp
12
nR
13
4
5
6
3
2
1
nS
U32-14
7474
Q
nQ
D
Cp
nR
2
0.002
1K
220
5
4
6
U32-9
KSCANDET
HP 9830 Computer
Section: Keyboard Scan Logic
Page: K1 Rendition: 2014 Dec 26
Cn
DELAY BEFORE
REPEAT
KEYBOARD LOGIC
Assembly 32
12
U32-10
74123
1.7S
5
Q
nQ
11
R
10
9
6
7
18.2K
330
6V
4
U32-11
74123
11mS
13
Q
nQ
3
R
2
1
14
15
22.1K
1.8
6V
12
U32-11
74123
82mS
5
Q
nQ
11
R
10
9
6
7
28.7K
10
20V
a
a
4
U32-10
74123
14mS
13
Q
nQ
3
R
1
2
14
15
26.7K
1.8
6V
a