| 摘要 |
A reversible film cassette is disclosed for use with a photographic device such as a microfilm camera. A microcontroller including semiconductor memory circuits and a power source are resident in a film cassette. When the cassette is operatively positioned in the host photographic device, interfacing means are provided for establishing a two-way communication path between the microcontroller in the cassette and a microprocessor, or computer in the photographic device. Interface means are provided on opposite sides of the cassette for establishing a first communication path between the cassette and the photographic device when the cassette is loaded into the device in a first orientation. A second communication path is established when the cassette is loaded into the device in a second orientation. The microcontroller within the film cassette can determine the orientation of the cassette in the photographic device by determining on which path the communications occurred. The microcontroller within the cassette having information concerning the mode of filming being used, can then determine if the cassette orientation is correct.
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