Apple IIe keyboard switches

On May 3, 2013, at 9:50 AM, Geoffrey Oltmans <oltmansg at gmail.com> wrote: CGA is less likely, since it's not really analog. Analog RGB is already pretty well supported by SCART, but that's not much help to those of us in the US or anywhere that's not Britain. It's silly in a way, since the signal has to be converted to RGB internally to display on the CRT, but most manufacturers weren't interested in spending money on connectors and circuitry that almost no one would use. The Apple IIgs monitor scans at 15 KHz, though, so it's actually a pretty good candidate for analog RGB. I use it to test arcade boards, which generally scan at 15 KHz as well. Any other arcade monitor ought to do the trick. It's harder to find VGA monitors that will do it (even LCDs, which is a shame because it's really only a matter of firmware with them). Clarification to the above: 15 KHz refers to the horizontal scan rate; vertical (in the US) is 30 or 60 Hz, depending on how you count the interlaced frames if you have them (arcade monitors are generally not interlaced, but TVs and anything that takes the standard composite TV signal are). - Dave