switcher.a "VTSetUp: ;VTSetUp Structure" describes commands ("extended line headers"). Command appears to be 16-bits (8 bits of R and 8 bits of G or 8 bits of B and 8-bits of I), command id + data.
How does Toaster know when RGBI is "ELH" command or when it is only supposed to be fed to MUX C's DIGBR, not parsed as "ELH" command. (DIBGR data can have same bit pattern as "ELH" VTI_Ex header type)
Something is still missing..
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