> It's in typical obscure wording. Here it is, on page
> 249 of my book. Execution time is listed in two
> columns, one when in single line mode, fOSC = 250KHz,
> the other when in two-line mode, fOSC = 160KHz. Many
> of the parameters are three times faster in single
> line mode, whether using 5x10(1/11 duty cycle)or
> 5x7(1/8 duty cycle) font. Two line mode is always 5x7
> with 1/16 duty cycle.

Well, that's interesting to know. I've looked through the Hitachi
book again, trying to find some direct or implied link between
lines and speed but nothing. Not for the 44100 or 66780 either.
Every note or test case is cited with fosc = 250kHz, with no
indication that speed is related to 1 or 2 lines. Certainly from this
data you'd not expect any significant operational difference. In
fact if you look at the Frame Frequency diagrams, you might
conclude that there is likely no difference between 1/8 and 1/16
Duty Cycle. 1/8 takes 400 clocks and 1/16 takes 200 clocks
to give each a FF of 78.1Hz

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