Some of our latest additions are shown below - clicking on the link will take you to the items main page and will also show any further photographs.
This Sun cluster unit ran Solaris and includes two headunits.
The Samsung Series 3 Chromebok was introduced in October 2012 at a San Francisco event with the Samsung Chromebook XE303. The device was cheaper, thinner and lighter than the previous Chromebook 550 model. Google marketed the Series 3 as the computer for everyone, due to its simple operating system (Chrome OS) and affordable price. Target markets included students and first-time computer users, as well as households looking for an extra computer.
The Commodore 8250 is a dual-unit 5.25" floppy disk drives for Commodore International computers. it uses the IEEE-488 interface common to Commodore PET/CBM computers.
The 8052 is a dual-sided drive, whereas the 8250 can only use use one side of a disk. Both use a quad density format storing approximately 0.5 megabyte per side. This drive is not dual-mode, so it cannot read or write disks formatted by the more common lower-capacity Commodore 1541 or Commodore 4040 models.
The Commodore 8050 is a dual-unit 5.25" floppy disk drive for Commodore International computers. it uses the IEEE-488 interface common to Commodore PET/CBM computers.
The 8050 is a single-sided driveusing a quad density format storing approximately 0.5 megabytes per side. The density of media is similar to later PC high density floppy disks, but with the original 300-oersted coercivity used by double density drives. This drive is not dual-mode, so it cannot read or write disks formatted by the more common lower-capacity Commodore 1541 or Commodore 4040 models.
The Commodore 4040 is the replacement for the previous models 2040 (USA) and 3040 (Europe). It's a dual-drive 5¼" floppy disk subsystem for Commodore International computers. It uses a wide-case form, and uses the parallel version of the IEEE-488 interface common to Commodore PET/CBM computers.
This external SCSI tape drive connects to a DEC microcomputer.
Introduced by HP in 1976, the 9885M was a modular eight inch floppy disc drive originally introduced for the HP 9825A. It had a built-in controller board and could optionally be attached to a 9855S slave disk drive. The 9885 accepted SS/DD discs and had a maximum storage capacity of 458K. It had an average access time of 267ms and a data transfer rate of 23K bytes per second.
We are grateful to Michael Pinnock of the British Antarctic Survey for the following description of this exhibit:
A custom-made microcomputer used by the British Antarctic Survey (BAS) on its Antarctic research stations, ships, aircraft, and its Cambridge research institute. It was primarily designed for controlling and logging data from experiments (e.g. automatic weather stations, airborne geophysics, shipborne oceanography) but could also be used for data and text processing.
Its design evolved in the early 1980's (1980-1982) and some 25 of them were produced by 1985. The last unit was taken out of service in 2003 - at that time it was still reliably logging geomagnetic field data at BAS's Halley research station.
Based around a Motorola 6809 processor, it ran the Flex operating system.
The design owes much to the rapidly evolving Cambridge microcompputer scene in the early 1980's, e.g. the first processor board used was an Acorn Atom design, although later units had a custom made processor board.
Additional design details from Jim Turton:
The BAS micro was indeed spawned from the SWTPC and Flex. However the hardware was more similar to the CMS (Cambridge Microprocessor Systems) board, which was a single board 6809 computer that also ran Flex DOS. This was also inspired by the Acorn Atom single boards around at the time. Acorn mostly used the 6502 processor - later used in the BBC Micro, but it did make a 6809 version. Although Acorn never used Flex like CMS. Essentially we cribbed this idea to design our own 19 inch card frame board. We designed the hardware and it was laid out on PCB by one Arthur Bartrum of 'Batvale' in Sutton. The processor board had 6809 processor and 8k of static memory plus address decoding only. We also developed our own bootstrap monitor which had some powerful debugging features. Additional cards had an ACIA (6851) serial port (for RS232) terminal comms, a PIA (6820) for a parallel printer port and a PIA for disc interface. Other cards had vaarious custom interfaces such as ADC's and DAC's for experiment interfacing.
For the printer we used the Epson RX80 dot matrix printer then the FX80 (or the other way round). The system supported two 5.25in floppy drives. One for the Flex DOS and programs and the other for data.
Introduced by HP in 1976, the 9885S was a modular eight inch floppy disc drive originally introduced for the HP 9825A. It lacked a built-in controller board and was designed to be attached to a 9855M master disk drive. The 9885 accepted SS/DD discs and had a maximum storage capacity of 458K. It had an average access time of 267ms and a data transfer rate of 23K bytes per second.
This Sperry PC is run MS-DOS. It features an EGA display and is fitted with a Microsoft bus mouse and hard disk drive.
This computer manufactured by Norsk Data was used by Thames Water Authority in an industrial control capacity.
Although photographed without any boards, we do have a complete set of boards for it.
The SJ Research MDFS (Modular Disc File Server) is widely regarded as the best Econet file server. Major features included its reliability, performance and flexibility. The MDFS could support up to 4 SCSI hard discs, 4 floppy discs, tape cartridge drive and 2 printers. SJ Research made matching expansion cases for floppy discs, hard discs and tape drives.
More information is available here.
This 9-track SCSI tape drive from Overland Data can read tapes at either 1600bpi or 6250bpi (user-selectable).
The PDP-11 was Digital's successor to the hugely successful PDP-8. The PDP-11 was a 16 bit machine and was launched in 1970.
Amazingly the PDP-11 series was still in product right up until 1990, the lst version being the MicroPDP-11/94.
This standalone hard drive unit could store up to 6MB of data. Corvus System's patented system allowed it to back up it's data directly onto VHS tapes, storing data at around 600KB/minute. A 'remote control' output on the rear of the unit allows it to directly control specially-designed VCR recorders.
This diskless workstation manufactured by Corvus Systems was intended to share standalone hard disks over a local area network known as Omninet. Up to 63 workstations were supported. A specially-designed CRT display sat on top of the main unit and could be roated from rotated and switch from portrait mode for the word processor to landscape mode for the spreadsheet. Software and hardware was designed to handled the change smoothly.
The Zebra 1750 was announced in May 1985 by General Automation. It ran the multiuser Pick Operating System and could support up to 12 terminals. A hard disk of up to 120MB was supported. The processor was a 10Mhz Motorola 68000 and it featured 128KB of dram expandable to 1MB.
A PDF of the manual for this machine can be found here.
SUN 411 SCSI drive case with a 150MB tape drive.
The Sun Ultra 2 (codenamed 'Pulsar') was an UltraSPARC-based workstation sold in 1996 by Sun Microsystems.
The Sun 3/80 resembles a a SparcStation "pizzabox"-type chassis, but it is not a member of the Sparcstation range. It is actually a Sun3 using a Motorola 68030 CPU. Because of the type of case, it's the only Sun3 "pizzabox" to allow internal hard-drives. Unlike most other Sun3's, the 3/80 uses a Type4 Keyboard. It also lacks any S-bus slots.
The SPARCstation 1, or Sun 4/60, is the first of the SPARCstation series of SPARC-based computer workstations sold by Sun Microsystems. It had a distinctive slim enclosure (a square 3 inch high "pizza box") and was first sold in April 1989, with Sun's support for it ending in 1995.
Based on a LSI Logic RISC CPU running at 20 MHz, with a Weitek 3167 (or 3170) FPU coprocessor it was the fourth Sun computer (after the 4/260, 4/110 and 4/280) to use the SPARC architecture and the first of the sun4c architecture. The motherboard offered three SBus slots and had built-in AUI ethernet, 8 kHz audio, and a 5 MB/s SCSI-1 bus. The basic display ran at 1152×900 in 256 colours, and monitors shipped with the computer were 16 to 19 inch greyscale or colour.
Designed for ease of production to compete with high-end PCs or Macs, it sold for between about US$9,000 (with no hard disks), to US$20,000 — and in the first year around 35,000 units were sold.
The SPARCstation 2, or SS2 (code named Calvin) is a SPARC workstation computer sold by Sun Microsystems. It is based on the sun4c architecture, and is implemented in a pizza box form factor.
The SPARCserver 20 system, introduced in 1994, was designed to be a workgroup NFS file server or a database server in an office environment. It was based on the same MBus and SBus technologies as the SPARCserver 10 system. Performance was increased over the SPARCserver 10 by using faster MBus and SBus technology, and faster SPARC modules.
Announced in 1995, Acorn's SchoolServer was on of their first products to be based on IBM's PowerPC technology. It came pre-installed with Microsoft SchoolServer architecture, based on the Microsoft Windows NT Server 3.5 network operating system. Acorn OmniClient could be installed on Acorn RISC OS client computers enabling connection to Acorn SchoolServer. Acorn, Apple and PC clients were available, allowing users to store and retrieve files on Acorn SchoolServer in an integrated IT environments.
"The Acorn SchoolServer provides a complete fileserver solution to meet schools' networking needs, with the capability to consolidate curriculum and administration networks. It uses powerful Risc based hardware server, offering high performance, reliability and expansion capability, that comes supplied with Microsoft Windows NT software, offering the latest in advanced server software. The Acorn SchoolServer can also be supplied with Acorn OmniClient which is unique in offering the advantages of integrated networking in a mixed environment of RISC OS, Apple Mac, PC and Unix-based network stations, and gives a consistent user interface to Acorn and other network servers."
The PowerBook 145B was a laptop made by Apple Computer. The PowerBook 145B was the same as the PowerBook 145 that came before it, but with a lower price and additional 2MB of RAM soldered to the motherboard. The only codename for this model is Pikes Peak.
Unlike previous Mac models but like the Performas, the 145B did not ship with a full set of system disks. System 7.1 was preinstalled on the internal hard disk, and a single system start-up disk was included. The package also included two utilities that provide basic backup and restore functions. Unlike the 140 and 145, the 145B cannot run System 7.0.1 - it needs at least System 7.1.
The 145 was superseded by the PowerBook 150 as the next low end PowerBook.
This robotic turtle is designed to be used with the Logo graphical programming environment. The user instructs the turtle to move and turn; the turtle mirrors the movement of it's on-screen counterpart, producing output with a pen.
The Dreamcast Keyboard is a keyboard peripheral built for the Sega Dreamcast. Though keyboards had existed for consoles in the past, the Dreamcast's keyboard was seen as the first "useful" one, thanks to the Dreamcast's internet capabilities. It was also the first console keyboard to be released internationally in large numbers. Many games can be used in conjunction with the Dreamcast Mouse, effectively simulating PC controls for first person shooters.
A magnetic core memory board, likely from a DEC PDP/10 minicomputer.
Part number: 30-10654-6
DEC part number: H-216
Serial number: 7338-B- -2428
Size: 8K x 19
The Sinclair Cambridge Programmable Calculator was also sold in the U.S as the Radio Shack EC-4001.
It had an 8 digits red LED display (made by National Semiconductor).
Scientific programmable. Integrated circuits - National Semiconductor MM5799EHY/N and DS7784N
50 mm x 111 mm x 28 mm.
Made in England.
This Sinclair ZX Microdrive is believed to be either an internal prototype or promotional variant. It has a standard issue three Microdrive board inside but is encased in a ttransparent case allowing the workings to be observed.
From Rick Dickinson (10th October 2015) :
"It appears to be from the production injection tools and likely to be an internal engineering request to see whats going on inside where the tape runs across the head to observe specific tape problems. Note the metal plate is missing suggesting it was deliberately not put on and therefore obscure what lies beneath that surface. Tool trials often used 'other' materials that happened to be running on the trial moulding machine so it could be that too, but unlikely due to missing plate. Nice that one has survived."
The IBM 5151 Personal Computer Display is a monochrome CRT display originally sold with the IBM 5150 Personal Computer. In order to reduce eye fatigue the 5151 used a long-persistence phospor; this reduced perceived flicker. As it was intended for business users, the Monochrome Display Adapter (MDA) it was paired with did not support graphics modes.
The 5151 is unusual in that it does not have an internal horizontal oscillator. The horizontal sync input signal goes straight to the horizontal driver stage - this means that driving it with an incorrect horizontal refresh signal can cause the monitor to be physically damaged (usually by burning out the flyback transformer).
2MB RAM expansion for the A3000-series of computers.
RAM expansion for the A3000-series of computers.
The Watford Electronics 64K RAM-ROM Extension Board expands the RAM capacity of the standard BBC Micro and allows up to five ROM/EPROM modules to be fitted.
By William Stuart Systems.
The Viglen Sideways ROM Cartridge system allows you to plug in any sideways ROM/EPROM (8k or 16k) without having to open up your BBC Micro each time. It provides an extension of any of the existing sideways ROM sockets to the rectangular slot left of the keyboard. The Viglen Sideways ROM Cartridge then plugs into the socket.
The PearTree RAM/ROM Cartridge allows you to install either 32k of sideways RAM or four 16k ROMs into a single cartridge slot on a BBC Master computer. A write protect switch allows ROM images to be loaded and run from sideways RAM.
The Gravis Destroyer Tilt is a USB joypad that features a tilt sensor which can function as an analogue joystick.
The Solidisk EPROM programmer conects to a BBC Micro computer and allows the user to read, write, compare, and test EPROM chips.
The Toy Control Interface was developed jointly by MICREX and Manchester SEMERC to extend the educational possibilities of switches and electrical toys used with multiply handicapped and young physically handicapped pupils. The Interface is supplied with a basic set of software to allow a variety of demands to be made on the single-switch user, and to provide a simple record of the user's performance.
This small graphics tablet connects to the BBC Micro and includes stylus and graphics software.
A video digitiser for the Archimedes computer
The EMR Sampler 8 expansion card is a high quality 8-bit mono sampler for use with SoundSynth, or equivalent software. It provides:
- dual sample rate input: 22.05kHz and 44.1kHz
- High impedance Mic/Tape (Line) switch
- mono standard jack input socket
- output via stereo 3.5mm socket
- 5V operation
More images are available here.