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Expander 1The Expander 1 unit was an interface that allowed the VideoBrain to connect to cassette recorders, printers, and modems, similar to the Atari 850 interface. The Expander 1 two sets of audio ports for playback and recording, and two RS-232 ports on the back for connecting a printer and the Expander 2 Acoustic Modem. All in all, the Expander 1 is a useful little unit. Several VideoBrain programs made use of the Expander 1,
including APL/S, Money Minder, Timeshare, and Information
Manager. The unit interfaced with the VideoBrain via a
plug in the back of the unit. It is unknown how many
Expander 1 units were produced, but the two that have surfaced
have incredibly low serial numbers (29 and 73!). It appears that the Expander 1 underwent a cosmetic change later in lifespan. Recently a unit with the serial number 868 appeared on ebay with a black front panel with slightly different text placement for the ports. It is now assumed that at least 1,000 Expander 1 units were made, although very few have surfaced. Specifications
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