31-07-2017, 05:23 PM
Some years ago I designed a DVI interface to for a client. The simplified explanation is it took DVI from a PC, bunged it in a framestore and put it out as PAL/NTSC video. A colleague tweaked the PC so that it recognised the EEPROM on the interface which effectively told the PC that is was connected to a monitor that ran at 50Hz. I think I simply took 720x576 out of an ordinary 800x600 VGA image.
Could have easily modified it to work at 405 or 240, especially with the software used by Peter Scott to make a VGA/DVI output run at 405/50 or 240/25.
This solution would be far too complex and costly for amateur experiment. If I've still got some of the DVI interface cards I could easily plug them into the experimental 615>405 converter I built and repogram the FPGA to make proper syncs etc. But I think I slung out the interface cards.
Could have easily modified it to work at 405 or 240, especially with the software used by Peter Scott to make a VGA/DVI output run at 405/50 or 240/25.
This solution would be far too complex and costly for amateur experiment. If I've still got some of the DVI interface cards I could easily plug them into the experimental 615>405 converter I built and repogram the FPGA to make proper syncs etc. But I think I slung out the interface cards.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
