>The video signal format is sync on green 54.9 KHz horizontal and 60 Hz
>vertical in the 'GPX mode' the SPX mode runs 70 KHz horizontal and 66 Hz
>vertical. the NEC Msync 4d tops out at 50 KHz or 57 KHz so it may be 
>useless where this is concerned.              

Thanks for the info.  I was wondering what the 4d's specs were.  I hadn't
tried it with a SPX or GPX card, just the mono graphics of an M38.

Jerome