Re: Reccomending a monitor?

["Kelli Halliburton" <kelli217@crosswinds.not>]

Michael J. Mahon wrote:
>> The other issue is if the 80 columns are interlaced or not.  The
>> standard composit output from the Apple is 30 frames (not 60)
>> interlaced.
>
> No, the Apple II video is 60 fps, non-interlaced.

No. NTSC video is 30 frames per second interlaced, which works out to 60
FIELDS per second. The reference to 60 fields per second (an interlaced
frame consists of two fields) is probably what inspired the earlier poster's
correction.

Apple II video is NTSC video, because it can be output to any NTSC
composite, or monochrome monitor.

And I use the term "NTSC monochrome" advisedly, to indicate 525-line,
30-frame-per-second, interlaced monochrome video. I would also use the term
"PAL monochrome" in the same context to indicate 625-line,
25-frame-per-second monochrome video. Of course, we could always adopt HD
nomenclature, and say 525/60i and 625/50i.

HDTV terminology deals with the smallest vertical refresh unit, which is a
frame in progressively scanned video, but a field in interlaced video, and
indicates the method of scanning used as the last character, so a
progressively-scanned image at the same resolution and frame rate would be
625/30p.