To kolano and Taiyoumaru, If you want some superb upscale like xbrz, but with use of shaders (it called ScaleNx), you may be interested in dosbox version used in retroarch. There are predefined shader preset with 9x upscale ratio (4K resolution).

dugan , but the dosbox(daum build) has a awesome xBRZ scaler. dugan and Asterisk , it seems most optimal variant, for me... fulldouble=true output=direct3d machine=vesa_nolfb vmemsize=32 forcerate=59.94 - limits the maximum fps, If this value not specified, then dosbox records(and renders the game) …

enabled doublebuffer? Yes. Found a video of that game recorded without vsync - http://www.youtube.com/watch?v=Ej-KMC-T0l8&list=PL527D39E1742D2A44 , time 04:07 - 04:13. It turns out, that i have no problem with vsync with dosbox daum build, I do not have such tearing in this place and in others to …

Decided to play this game, I noticed small tearing in this game, almost imperceptibly. Tried builds with VSYNC(on, force, host) and other things, but nothing helped. Then recorded using dosbox internal recording (70.09 fps) and that's what - http://thumbnails111.imagebam.com/39937/07f43d399360179. …