Sage IV (Open Model)
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The Sage IV came out in 1983, a year later than the Sage II. The Sage IV used the same CPU logic board as the Sage II and added a second board that sat atop the first board and connected via the system bus connectors. This second PCB contained another 512 KB of DRAM, four serial ports for supporting more simultaneous users, and a winchester controller connecting to either a 5 MB or 40 MB hard disk.
One of two Sage IV in our collection, this model has a sticker on the front labelling it as machine 89, it has a DEC service slip on the top, with Tag E212.
The machine unlike the other model IV, is open at the front and back, and has the main board lower down.
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This exhibit has a reference ID of CH45033. Please quote this reference ID in any communication with the Centre for Computing History.