The Timex/Sinclair 1000 with I/O Board
[click here to view actual T/S 1000 program]

This example shows how 2 I/O board outputs can become 4 unique outputs.

Overview of interface for BASIC program example above..
Although 4PDT relays were used, this is an example of how
one 2PDT relay can control track power and another item.
Example of how the layout communicates with the computer
by way of a photo resistor.  A magnet on the underside of a train will
close the reed switch positioned in the track.
This table is meant to be a programming aid.

[click here to view actual T/S 1000 program]

[click here for more about the interface]

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