This strange mixture between telephone and computer is actually a Sinclair QL (slightly modified, of course). It is based on the QL motherboard, but with some improvements, namely, ruggedized (in other words, more reliable) Microdrives.
ICL also added some software in ROM: diary, address and phone book, communication software and a terminal emulator. It has a built-in modem and a speech synthesizer.
According to ICL, each executive should have this computer on his desktop !
Two rebadged versions were sold in UK (Merlin Tonto) and Australia (Telecom Computerphone).
More information from 'Ex Cathedra'
This was a classic design disaster - great ideas, poor execution. The microdrives didn't buffer as the Sinclair ones did, leading to a 7-sec seek time ever time a block was missed. The phone handset was 3/4 size and uncomfortable to use. Overheating was a big problem too, with frequent crashes. The speech synth could answer the phone with a Texas Dalek voice, but couldn't take a message. A fave in-house game at ICL was getting the thing to swear using the limited vocab range...
The main software was Psion xChange - WP, spreadsheet, DB and business graphics. This was in ROM, with the BASIC interpreter on Microdrive - Sinclair QLs were the other way round. xChange was a good package for its day, and actually looks very similar to the built-in packages on the Psion PDAs (3a, 5). The terminal emulation was a VT-type and a PRESTEL (the UK info service operated by the post office).
The system, as did the QL, had basic task-switching - not real multitasking (background tasks didn't run) but at least you were not constantly unloading and reloading programs as on the IBM PCs of the day. A big boon given the problem with the microdrives...
Add-on ROMS were available (your pic actually shows one top right) which made the machine into an ICL7561 terminal emulator. This was a popular configuration as ICL discounted them heavily and they ended up cheaper than the original terminals.
I was part of a team evaluating the OPD for ICL before release and we recommended that it not be released until the software worked properly and several ergonomic issues be resolved. The board released it anyway. My personal one burst into flames one day in1988
Thursday 7th July 2016
I have compiled some useful information on the OPD / Tonto, which can be found on the QUANTA web site.
QUANTA supports QL and related systems, and I am responsible for maintaining the societies web site. If anyone would like to donate their OPD / Tonto to QUANTA, or would like to support, documentation or advice, please get in touch.
We can offer a small sum for surplus OPD / Tonto hardware and accessories, which we donate to the Red Cross. We are trying to establish an OPD / Tonto support network, so that enthusiasts can swap software, trade hardware and keep this machine alive.
We are in the process of scanning in manuals and documentation for the OPD, establishing an OPD software library and list of frequently asked questions (FAQs). FAQs will include : where to obtain OPD software, tips for repairing damaged monitors, suggestions for troubleshooting hardware faults and advice on exchanging files with a PC or Sinclair QL
I worked at ICL as a summer student in 1992, and OPDs were still in active use on every department manager's desk. Presumably they didn't know what to do with all the thousands of OPDs they couldn't sell!
Wednesday 1st December 2004
Ian Chard (UK)
OPD - One Per Desk
BUILT IN LANGUAGE
Full stroke 73-key with numeric keypad
Motorola MC 68008
Sinclair ULA gate array chip
128 KB (extensible to 640 KB)
From 128 KB to 352 KB
42 / 64 / 84 chars. x 24 lines
256 x 256 (8 colors) / 512 x 256 (4 colors)
TI TMP5220C speech synthesiser / built-in loudspeaker