drtiller@uokmax.ecn.uoknor.edu (Donald Richard Tillery Jr) (09/28/90)
Ok, I know, I posted this on c.s.a a few weeks ago but I was ignored and I really would like some input (possibly from the C= gods). I am using 2.0 in a 16 color mode (see my Iconize program in abcfd20 for why) and am only disturbed by the speed of scrolls in CLIs. Obviously a 4 bitplane screen requires a 4 bitplane scroll. However, since the CLIs almost never use any other than the base 4 colors (with the palette I use the other 12 colors wouldn't be very exciting anyway) to maintain compatibility with people in 4 color mode (that is text files with escape codes limit the colors by default), wouldn't it be practical and (I hope for this is the reason for this post) possible to ignore two of the bit planes on the scroll and achieve a scrolling rate equivalent to the 2 bit plane scroll? I don't figure C= will add that type of feature to 2.0 themselves (well I could hope but I won't hold my breath) but could someone give me enough information for me to put together a hack which would do this (or maybe someone with more time and expertise could throw such a hack together for me). I love the 16 color (and 8 for that matter) modes in 2.0, and they aren't really all that slow on an accelerated machine, but those CLIs are agonizing. Any assistance would be GREATLY appreciated. Rick Tillery (the displaced Razorback)
cmcmanis@stpeter.Eng.Sun.COM (Chuck McManis) (10/10/90)
Warning I'm committing a cardinal sin by answering this with 140 messages left to read, if its been answered already great. In article <1990Sep28.145705.11637@uokmax.ecn.uoknor.edu> (Donald Richard Tillery Jr) writes: >I am using 2.0 in a 16 color mode (see my Iconize program in abcfd20 for why) >and am only disturbed by the speed of scrolls in CLIs. Obviously a 4 bitplane >screen requires a 4 bitplane scroll. The problem is that the 4 bitplane screen is eating all of the Chip bus bandwidth just to display it do the blits are getting locked out of the chip bus. Answer is either do the scrolling manually in blitter nasty mode (which only helps a little since all that does is lock out the CPU) or use the 4 abreast screen scrolling technique which doesn't work in layers. -- --Chuck McManis Sun Microsystems uucp: {anywhere}!sun!cmcmanis BIX: <none> Internet: cmcmanis@Eng.Sun.COM These opinions are my own and no one elses, but you knew that didn't you. "I tell you this parrot is bleeding deceased!"