RGB-VGA Converter -- buy or build?

Jovica Stojoski wrote: This would seem to be WAY off topic even for cctalk, but hey-ho... Go find yourself a Microvitec Cub or Philips CM8833 monitor -- either of these should be easily obtainable for far less than a scan converter. There are other monitors that should work -- the Acorn AKF17, for instance, was a reboxed version of the CM8833, and dozens of other companies made CRT-type TV monitors. Converting from 15kHz fixed frequency to VGA (which has a line frequency of 31.5kHz) would most likely involve a triple A/D converter, a dual-ported frame buffer RAM, a triple D/A converter, and some form of timing controller (I'd probably use an FPGA with an internal PLL -- use the PLL to double the line rate of the incoming signal). Another option might be an TV with a SCART input -- wire your RGB and sync signals to a SCART plug, then plug those into the TV. Quality isn't going to be particularly stellar, though, especially on a cheap TFT monitor. The CM8833 et al were all designed as computer monitors, and are far better suited to displaying text and graphics. -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/