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Alfaskop






Beginning in the late sixties continuing in late nineties there were development of IBM compatible terminal system under the brand Alfaskop. At the beginning the terminals were compatible with the IBM 2260, but the later models were 3270 compaible. The System 41 depicted above were actually a entire system that could either run various terminal emulation software or a be used as a personal computer running UCSD p-System.

The development took placed under many different companies ownership. It started in ITT owned SRT (Standard Radio och Telefon) and then transfered into Stansaab onto Datasaab, which then was bought by Ericsson. Ericsson sold the division to Nokia that sold it to ICL and then it ended up with computer terminal manufacturer Wyse who closed down operation in 1998.

Marketing material




Alfaskop Series 41 technical documents



Alfaskop 3500  


 Alfaskop 3500 Data Terminal System Drawings and Diagrams


Interfacing

A project has been started to try to get the old Alfaskop 4110 terminal running again. This involves a lot of small details since it is not self-contained. The terminal itself is part of a cluster of terminals and in the center there is a cluster controller which is the communication processor and the floppy disk unit. All these members of the cluster communicates with each other using a two-wire bus called SS3. The terminal itself boots from the cluster as well which means without a CP4101 communication controller, a FD 4120 flopy drive and the right software on a diskette the terminal will not do anything.

Since we currently lack the 4101 and a 4120 the idea is to emulate these in the MAME simulation framework and let these talk to real hardware through a small bridge device which has the actual SS3 hardware. This project is further described here: alfaskop_emu

The current status is that the 4110 terminal responds to the poll request that is sent from the hardware bridge to the terminal over the SS3 bus which means that communication on the low level is woring fine. The next step would be to start work on simulating the entire terminal in MAME with the original EPROM contents of the terminal.

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