amiga: How to change DblNTSC in multiscan mode?

Subject: How to change DblNTSC in multiscan mode?
To: None <amiga@NetBSD.ORG>
From: Tomasz Goral <tomgo@student.uci.agh.edu.pl>
List: amiga
Date: 03/19/1996 10:44:51

	I've installed NetBSD1.1 on my A1200 with SVGA. Could anybody 
tell me how to change default DblNTSC in multiscan mode ?
I've tried by binpatch (I changed HB/S STRT/STOP, VB/S STRT/STOP, H/V TOTAL
to the values that I see in MonEd3a in multiscan mode and then screen 
crashed/ doesn't sync).

Are there other Xservers for AGA than default Xdaniver ? I'd like 640*480 
view mode (or better if it's possible).