Скачать или смотреть What's inside the Sony CCU-M7? TV studio electronics from the 1980s

Like the remote control I showed in the previous video, the Sony CCU-M7 camera control unit contains an HD6305 8-bit microprocessor and a removable EPROM, which makes it fairly easy to reprogram. Aside from being a lot bigger, it has a few more interesting bits than the remote.

Looking at the datasheet for the processor again, it seems that the serial communication module in the processor implements SPI, or something akin to it at least, and so would be unsuitable for use with the 1-wire bus shared by the CCU, the remote, and the camera. Thus, the implementation using the interrupt pin as input would seem to be a sensible alternative.



 (Note to future self: Hold objects so that labels appear right-side up in the video.)