Can the 7403 output teletext data across the 656 bus in both bt.653 and raw data format?
Bt.653 will show up as ancillary data for sure. For raw, do you just mean the raw digitized output? You can get the raw digitized data on the output with the VBI_EN bit.
Not sure, the signal is coming in on the composite line.
VBI_EN will pass the raw digitized data in the blanking. I think that is what you are looking for.
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