As a general purpose computer system, the ICL 1900 series
machines had a variety of peripheral types and models
available. Non-standard 'exotic' devices could be connected
via a uniplexor.
| Basic Peripherals |
Paper Tape Readers
 |
*TR
Type=0 |
1915/1 |
8-track 300 cps |
| 1916/1 |
8-track 1000 cps |
| 2601 |
8-track 250 cps
Combined Reader/Punch |
| 2602 |
8-track 1000 cps
Combined Reader/Punch |
| Paper Tape Punches |
*TP
Type=1 |
1925/2 |
8-track 110 cps |
| 2601 |
8-track 110 cps
Combined Reader/Punch |
| 2602 |
8-track 110 cps
Combined Reader/Punch |
Line Printers
 |
*LP
Type=2 |
1930 |
120pp 1000lpm 6lpi |
| 1931/1 |
96pp 300lpm 6lpi |
| 1931/2 |
120pp 300lpm 6lpi |
| 1932/1 |
96pp 600lpm 6lpi |
| 1932/2 |
120pp 600lpm 6lpi |
| 1933/1 |
96pp 1,350lpm 6/8lpi
Automatic Write facility available |
| 1933/2 |
120pp 1,350lpm 6/8lpi
Automatic Write facility available |
| 1933/3 |
160pp 1,350lpm 6/8lpi
Automatic Write facility available |
| 2401/1 |
96pp 300lpm 6lpi |
| 2401/2 |
120pp 300lpm 6lpi |
| 2402/1 |
96pp 600lpm 6lpi |
| 2402/2 |
120pp 600lpm 6lpi |
| 2404/1 |
96pp 300lpm 6lpi
Available for use with 1901A/1901S only |
| 2404/2 |
120pp 300lpm 6lpi
Available for use with 1901A/1901S only |
| 2405/1 |
96pp 600lpm 6lpi
Available for use with 1901A/1901S only |
| 2405/2 |
120pp 600lpm 6lpi
Available for use with 1901A/1901S only |
| 2408 |
132pp 300lpm 6/8lpi |
| 2409 |
132pp 600lpm 6/8lpi |
| 2430/2 |
132pp 1200lpm 6/8lpi - Train Printer
Automatic and Extended Write facilities available |
| 2430/3 |
160pp 1200lpm 6/8lpi - Train Printer
Automatic and Extended Write facilities available |
Card Readers
 |
*CR
Type=3 |
1911 |
80-Column 900 card/min
Codes 1900/1500 |
| 1912 |
80-Column 300 card/min
Codes 1900/1500 |
| 2101 |
80-Column 1,600 card/min
Codes 1900/1500/1004/1300/IBM1401/ISO |
| 2102 |
80-Column 300 card/min
Codes 1900/1500/1004/1300/IBM1401/ISO |
| 2103 |
40-Column 600 card/min
Codes A1/C1/ISO |
| 2104 |
80-Column 600 card/min
Codes 1900/1500/1004/1300/IBM1401/ISO |
| 2105 |
80-Column 300 card/min
Codes 1900/1500/1300/1004/IBM1401/ISO
Available for use with 1901A/1901S only |
| 2106 |
80-Column 600 card/min
Codes 1900/1500/1300/1004/IBM1401/ISO
Available for use with 1901A/1901S only |
| Card Punches |
*CP
Type=4 |
1920 |
80-Column 100 card/min |
| 1922 |
80-Column 33 card/min |
| 2151 |
80-Column 300 card/min |
| Digital Incremental Plotters |
*GP
Type=20 |
1934/1 |
Paper Length: 120 feet Paper Width: 12 inches
Plot Width: 10.8 inches Step Size: 0.01 inches |
| 1934/2 |
Paper Length: 120 feet Paper Width: 12 inches
Plot Width: 10.8 inches Step Size: 0.005 inches |
| 1934/3 |
Paper Length: 120 feet Paper Width: 31 inches
Plot Width: 29.5 inches Step Size: 0.01 inches |
| 1934/4 |
Paper Length: 120 feet Paper Width: 31 inches
Plot Width: 29.5 inches Step Size: 0.005 inches |
| 1934/5 |
Paper Length: 120 feet Paper Width: 12 inches
Plot Width: 10.8 inches Step Size: 0.1 millimetres |
| 1934/6 |
Paper Length: 120 feet Paper Width: 31 inches
Plot Width: 29.5 inches Step Size: 0.1 millimetres |
| Magnetic Peripherals |
Magnetic Tape
Decks
 |
*MT
Type=5 |
1970 |
7-Track 200/556 bpi NRZI 24/67 Kch/sec |
| 1971 |
7-Track 200/556 bpi NRZI 8/21 Kch/sec |
| 1972 |
7-Track 200/556 bpi NRZI 15/42 Kch/sec |
| 1973 |
7-Track 200/556/800 bpi NRZI 15/42/60 Kch/sec |
| 1974 |
7-Track 200/556/800 bpi NRZI 24/67/96 Kch/sec |
| 2504 |
9-Track 1600 bpi PE 80 Kch/sec |
| 2505 |
9-Track 1600 bpi PE 160 Kch/sec |
| 2506 |
9-Track 800 bpi NRZI 40 Kch/sec |
| 2507 |
9-Track 800 bpi NRZI 80 Kch/sec |
| 2508 |
9-Track 1600 bpi PE 80 Kch/sec |
| 2509 |
9-Track 1600 bpi PE 160 Kch/sec |
| 2510 |
9-Track 1600 bpi PE/800 bpi NRZI
Cluster controller |
| 2511 |
9-Track 1600 bpi PE/800 bpi NRZI
Slave Unit to 2510 |
Exchangeable Discs
 |
*ED
Type=6 |
2801 |
Exchangeable Disc Store (EDS4)
(approx. 4MCh per cartridge) |
| 2802 |
Exchangeable Disc Store (EDS8)
(approx. 8MCh per cartridge) |
| 2807 |
Dual Exchangeable Disc Store (DEDS6)
(approx. 6MCh per cartridge) |
| 2808 |
Dual Exchangeable Disc Store (DEDS8)
(approx. 8MCh per cartridge) |
| 2812/1 |
Disc Control Unit for use with 1x4420 EDS30 transport |
| 2812/2 |
Disc Control Unit for use with up to 9x2813 or
9x2814 EDS30 transports |
| 2812/3 |
Disc Control Unit for use with up to 9x2815 or
9x2816 EDS60 transports |
| 2812/5 |
Disc Control Unit for use with up to 8x53131
EDS200 transports |
| 2813 |
Exchangeable Disc Store (EDS30)
(approx. 30MCh per cartridge) |
| 2814 |
Exchangeable Disc Store (EDS30)
(approx. 30MCh per cartridge) |
| 2815 |
Exchangeable Disc Store (EDS60)
(approx. 60MCh per cartridge) |
| 2816 |
Exchangeable Disc Store (EDS60) - dual access
(approx. 60MCh per cartridge) |
| 2820 |
Twin Exchangeable Disc Store (TEDS) - 1901A only
(approx. 800KCh per cartridge) |
| 2821 |
Twin Exchangeable Disc Store (TEDS) - 1901A only
(approx. 1.6MCh per cartridge) |
| 4420 |
Exchangeable Disc Store (EDS30) - 3, 5, 7 or 9 cartridges
(approx. 30MCh per cartridge) |
| 53131 |
Exchangeable Disc Store (EDS200)
(approx. 200MCh per cartridge) |
Magnetic Card File
 |
*MC
Type=7 |
1958/1 |
Retrieval Unit holding up to 8 removable magazines of
256 cards, giving a capacity of 340MCh.
Each card, made of flexible plastic, is 16 inches long
by 4½ inches wide and contains 128 tracks with
a capacity of 165,888 characters. |
| 1958/2 |
Extension Unit holding up to 8 removable magazines of
256 cards, which may be fitted to a 1958/1 doubling
its capacity. |
| 1959 |
Control Unit for up to 4 x 1958 Retrieval Units |
Data Disc
 |
*DS
Type=8 |
1956 |
The Disc Store provides bulk storage of data with the facility
of direct random access to individual 60-word (240 character)
data sectors.
The sizes of disc store available range from 31.5MChs to 126MChs.
This device is believed to have only been available on the 1904/1905
under Executive E4BM. |
| Magnetic Drums |
*DR
Type=9 |
1962 |
Controller with 1-4 drums of 32,768 words capacity |
| 1963 |
Controller with 1-4 drums of 131,072 words capacity |
| 1964 |
Controller with 1-4 drums of 524,288 words capacity |
Cassette Tape
 |
*CT
Type=12 |
2501 |
8-Track serial NRZ
This type of magnetic tape was on supported on the 1901
processor. |
Fixed Discs
 |
*FD
Type=13 |
2803 |
Control unit for up to 14 x 2805 disc units |
| 2803/2 |
Control unit for up to 8 x 2806 disc units |
| 2805/1 |
Disc unit fitted with 7 discs providing storage for
100,663,000 characters |
| 2805/2 |
Disc unit fitted with 14 discs providing storage for
218,104,000 characters |
| 2805/3 |
Disc unit fitted with 26 discs providing storage for
419,430,000 characters |
| 2806/2 |
Disc unit fitted with 8 discs providing storage for
218,103,808 characters |
| 2806/3 |
Disc unit fitted with 15 discs providing storage for
421,527,552 characters |
| 2806/4 |
Disc unit fitted with 26 discs providing storage for
741,343,232 characters |
| High Speed Drum |
*HD
Type=25 |
2851 |
Controller with 1-8 drums of 524,288 words capacity
Requires high speed interface channel
Operating system use only |
| Communications Peripherals |
| Uniplexor |
*UX
Type=10 |
7010/3 |
Telephone Data Terminal (operates at 600/1200bps) |
| 7010/5 |
Telephone Data Terminal (operates at 2400bps)
Normally uses 4-wire private circuit |
| 7010/7 |
Telephone Data Terminal (operates at 4800bps)
Normally uses 4-wire private circuit |
| 7070/1 |
Telegraph Data Terminal (5-bit code working) |
| 7070/2 |
Telegraph Data Terminal (8-bit code working) |
| 7070/5 |
Telephone Data Terminal (Datel 200/110bps - 8-bit code) |
| Interrogating Typewriter |
*IT
Type=10 |
1938 |
Connected via a 7070 Data Terminal |
| Multiplexor |
*MX
Type=11 |
7007/2 |
Communications Multiplexor (max. 63 lines) |
| 7008/2 |
Telegraph Data Terminal (8-bit code working)
Used with the 7007/2 Communications Multiplexor |
| 7008/5 |
Telephone Data Terminal (Datel 200/110bps - 8-bit code)
Used with the 7007/2 Communications Multiplexor |
| 7010/1 |
Telephone Data Terminal (operates at 600/1200bps)
Used with the 7007/2 Communications Multiplexor |
| 7010/4 |
Telephone Data Terminal (operates at 2400bps)
Used with the 7007/2 Communications Multiplexor |
| 7010/6 |
Telephone Data Terminal (operates at 4800bps)
Used with the 7007/2 Communications Multiplexor |
| Scanner |
*MX
Type=11 |
7920 |
Scanner
Can be connected to a 7901 communications processor |
| 7922/0 |
Telegraph Line Termination Control Unit and Jacking Field
(houses up to 4 x 7922/1 LTUs) |
| 7922/1 |
Telegraph Line Termination Unit (CCITT single line) |
| 7923/0 |
Telegraph Line Termination Control Unit and Jacking Field
(houses up to 8 x 7923/1 LTUs) |
| 7923/1 |
Telegraph Line Termination Unit (16 x telegraph lines) |
| 7924/0 |
Modem Display Control Unit
(controls up to 8 x modem displays and connectors or direct
connection units) |
| 7925/1 |
Housing Unit, designed to house:-
7922/0 Line Termination Units
7923/0 Line Termination Units
7924/0 Modem Control Units
Modems |
| 7930/0 |
Scanner Control Unit (character buffering system)
Houses and powers either:-
2 x 7930/9 and 2 x 7930 scanners or
2 x 7930/9 and 2 x 7930 scanners
(Can be used in a 7903 message buffering system) |
| 7930/1 |
Scanner Universal provides 16 channels with CCITT interfaces
for the connection of either modems or 7922/1 LTUs
Available line speeds: 50, 75, 100, 150, 200, 300, 600, 1200,
2400, 4800 and 9600 bps. |
| 7930/2 |
Scanner Telegraph provides 63 channels for connection
to telegraph lines via 7923/1 LTUs
Available line speeds: 50, 75, 100, 150 and 200 bps. |
| 7930/3 |
Scanner Universal 110 bps provides 16 channels with CCITT
interfaces for the connection of either modems or 7922/1
LTUs
Available line speeds: 110 and 165 bps, and also 1200, 2400,
4800 and 9600 bps with self-clocking modems. |
| 7930/4 |
Scanner Telegraph 110 bps provides 63 channels for connection
to telegraph lines via 7923/1 LTUs
Available line speeds: 110 and 165 bps. |
| 7930/9 |
Scanner Selector
Character Buffering System:-
Connects directly to 1900 standard
interface
1 x 7930/2 or 7930/4, or
2 x 7930/1 or 7930/3 may be connected
Maximium 31 channels may be used
Message Buffering System:-
Up to 4 x 7930/9 may be connected to a
7903
Up to 4 scanners of any type may be
connected to each 7930/9
Maximium 1024 channels (Telegraph only)
Maximium 256 channels (Universal only) |
| Interactive Visual Display Unit Controller Mk.1 |
*ID
Type=14 |
7154 |
Local Control Unit with ? interfaces
Each interface may have a 7151 IVDU connected |
| Alphanumeric Visual Display Unit Controller Mk.2 |
*ID
Type=14 |
7180/2 |
Cluster Control Unit with 16 interfaces
Each interface may have a 7181/4 local AVDU
or a 7180/7 Expansion Unit connected
240 x 7181/4 ADVUs may be connected in total |
| 7180/7 |
Expansion Unit with 15 interfaces
Each interface may have a 7181/4 local AVDU connected |
| General Purpose Visual Display Unit |
*GD
Type=21 |
1830 |
1024x1024 Display, with 4K or 8K Store, Keyboard, Light Pen
Character Generator (optional?), Camera (optional) |
7900 Communications Controllers
 |
*CC/*PB
Type=24 |
7901 |
1901A used as a message buffering controller |
| 7903/2 |
Standard message buffering controller (16K store) |
| 7903/3 |
Standard message buffering controller (24K store) |
| 7903/4 |
Standard message buffering controller (32K store) |
| 7905 |
Advanced message buffering controller, based on the CTL
Modular One |
| Inter-Processor Buffer |
*PB/*IP
Type=28 |
7210 |
Allows for Inter-Machine Communication (IMC) and
Within Machine Communication (WMC).
WMC only if
7210 hardware not fitted. |
| Inter-Range Communications |
*IR
Type=31 |
|
for emulation (B/MEEP and K/MEEP) environments |
| Interrogation Display Unit |
*TV
Type=40 |
1831 |
8x256 Character Displays (4" x 2" screen), each with a 15 Key Keyboard
(also a 64 screen model) |
| Communications Terminals |
| Paper Tape Terminals |
|
7011 |
Datalink Transmitter |
| 7012 |
Datalink Receiver |
| 7013 |
Datalink Transmitter and Receiver |
| Remote Job Entry Terminals |
|
7015 |
Remote Job Entry Terminal with 1901A |
| 7020/1 |
Communications Terminal 600/1200bps half Duplex |
| 7020/2 |
Communications Terminal 600/1200/2400bps half Duplex |
| 7020/3 |
Communications Terminal 600/1200bps half Duplex (supercedes /1) |
| 7020/4 |
Communications Terminal 600/1200/2400bps half Duplex (supercedes /2) |
| 7020/5 |
Communications Terminal 600/1200/2400/4800bps half Duplex |
| 7021/1 |
Card Reader |
| 7022/1 |
Line Printer 96 Print Positions |
| 7022/2 |
Line Printer 120 Print Positions |
| 7022/4 |
Buffered Line Printer 120 Print Positions |
| 7022/5 |
Buffered Line Printer 132 Print Positions |
| 7023/1 |
Teletypewriter Friction Feed (Operator's Console) |
| 7023/2 |
Teletypewriter Sprocket Feed (Operator's Console) |
| 7023/3 |
Teletypewriter Friction Feed with Paper Tape (Operator's Console) |
| 7023/4 |
Teletypewriter Sprocket Feed with Paper Tape (Operator's Console) |
| 7023/5 |
Buffered Teletypewriter Friction Feed (Operator's Console) |
| 7023/6 |
Buffered Teletypewriter Sprocket Feed (Operator's Console) |
| 7023/7 |
Buffererd Teletypewriter Friction Feed with Paper Tape (Operator's Console) |
| 7023/8 |
Buffered Teletypewriter Sprocket Feed with Paper Tape (Operator's Console) |
| 7024/1 |
Paper Tape Reader |
| 7024/2 |
Paper Tape Reader (fast) |
| 7025/1 |
Paper Tape Punch |
| 7028/1 |
Paper Tape Reader/Punch Combined |
| 7028/2 |
Paper Tape Reader(fast)/Punch Combined |
| Teletypewriters |
|
7071/1 |
Telegraph (7cps), Friction Feed (KSR33) |
| 7071/2 |
Telegraph (7cps), Sprocket Feed (KSR33) |
| 7071/3 |
Telegraph (7cps), Friction Feed with Paper Tape (ASR33) |
| 7071/4 |
Telegraph (7cps), Sprocket Feed with Paper Tape (ASR33) |
| 7071/5 |
Telephone (10cps), Friction Feed (KSR33) |
| 7071/6 |
Telephone (10cps), Sprocket Feed (KSR33) |
| 7071/7 |
Telephone (10cps), Friction Feed with Paper Tape (ASR33) |
| 7071/8 |
Telephone (10cps), Sprocket Feed with Paper Tape (ASR33) |
| 7080/1 |
Receive only, HCP for 7181/2 and 7181/4 VDUs |
| 7080/4 |
Receive only, HCP for 7181/2 and 7181/4 VDUs with Paper Tape |
| Termiprinters |
|
7081/3 |
Receive only, Friction Feed HCP for 7181 and 7184 VDUs |
| 7081/4 |
Receive only, Sprocket Feed HCP for 7181 and 7184 VDUs |
| 7083/1 |
Telephone (30cps), 75 Print Positions Friction Feed, Paper Tape optional |
| 7084/1 |
Telephone (30cps), 75 Print Positions Sprocket Feed, Paper Tape optional |
| 7085/1 |
Telephone (30cps), 118 Print Positions Friction Feed, Paper Tape optional |
| 7086/1 |
Telephone (30cps), 118 Print Positions Sprocket Feed, Paper Tape optional |
| 7572/1 |
Receive only, for 7184 VDUs and 7500 range |
| Visual Display Units |
|
7151/1 |
Interactive Visual Display Unit (13 lines x 40 characters) 520 characters
(Local, Connected via 7154 Controller) |
| 7151/2 |
Interactive Visual Display Unit (13 lines x 80 characters) 1040 characters
(Local, Connected via 7154 Controller) |
| 7153/1 |
Interactive Visual Display Unit (13 lines x 40 characters) 520 characters
(Remote, Connected via 7070/3 or 7070/4 Terminal) |
| 7153/2 |
Interactive Visual Display Unit (13 lines x 80 characters) 1040 characters
(Remote, Connected via 7070/3 or 7070/4 Terminal) |
| 7181/2 |
Alphanumeric Visual Display Unit Mk.2 (25 lines x 80 characters) 2000 characters
(Remote, Connected via 7903 Communications Processor or 7930 Scanner |
| 7181/4 |
Alphanumeric Visual Display Unit Mk.2 (25 lines x 80 characters) 2000 characters
(Local, Connected via 7180 Controller) |
| 7182/1 |
Transparent Line Sharing Adaptor for 7181/2 AVDUs |
| 7182/2 |
Queued Line Sharing Adaptor for 7181/2 AVDUs |
| 7184/1 |
Alphanumeric Visual Display Unit (Master Unit) - emulates 7181/2 AVDU |
| 7184/2 |
Alphanumeric Visual Display Unit (Slave Unit) - emulates 7181/2 AVDU |
| 7184/6 |
Line Sharing Adaptor for 7184/1 AVDUs |
| 7184/7 |
Program Load Unit for 7184/1 AVDU |
| Exotic Peripherals |
| Universal Document Transport |
*UD
Type=23 |
8101 |
|
| 8201 |
UDT/OCR |
| 8301 |
UDT/OMR |
| 8401 |
UDT/OCR+OMR |
| Peripheral Simulator |
*PS
Type=39 |
|
A simple basic device 'driver' that allowed simple
character transfers to and from a Standard Interface
channel. |
| Crossfield Document Reader/Sorter |
*CD
Type=48 |
|
|
| Lundy Character Cheque /Sorter |
*LC
Type=49 |
|
|
| Copath Curve Generator |
*CO
Type=53 |
|
|
| EMI Camera/Fingerprint Scanner |
*EM
Type=54 |
|
|
| Link from Orion 2 |
*OI
Type=55 |
|
Must be paired with *OO |
| Link to Orion 2 |
*OO
Type=56 |
|
Must be paired with *OI |
| Cheque Sorter/Reader |
*CS
Type=57 |
8500 |
|
| Magnetic Tally Roll Reader |
*RR
Type=58 |
2701 |
|
| Magnetic Tape (Emidec 1100) |
*ET
Type=59 |
1198 |
1" wide tape compatible with the ICT 1101
(badged EMI EMIDEC 1100) |
| 1199 |
| Virtual Devices |
| File Reader |
*FR
Type=50 |
|
George 3/4 Only |
| File Writer |
*FW
Type=51 |
|
George 3/4 Only |
| File Handler |
*FH
Type=52 |
|
George 3/4 Only |
| Command Issuer |
*CI
Type=60 |
|
George 3/4 Only |