| Abstract: | The ICL 1905E at Queen Mary College, London and the CDC 6600 at the University of London Computer Centre, have been linked by a 48 kilobaud Post Office line. Jobs can be transmitted from the 1905E to the 6600, and resuts returned to the 1905E. A modified CDC data terminal (the QSE 2815) is installed at QMC, and is connected to the 1905E through a peripheral channel via a British Standard Interface converter. Standard CDC data transmission procedures are used; the software system is based on the CDC IMPORT/EXPORT package, with a program in the 1905E simulating the operation of IMPORT The 1905E software was written in two parts: an off-lining package which writes batches of programs to magnetic tape, and subsequently prints off-line output from tape, and a link control program which reads program batches from tape for transmission to the 6600, and writes to tape the output received from the link. This off-lining technique ensures that the full capacity of the high speed line is realized The link system began operation at the beginning of 1970, and is now used regularly to transmit jobs to ULCC and other sites in the network. Work is continuing on the provision of network facilities, and an integration of the link system with the operating system in the 1905E. |
