poole@forty2.UUCP (Simon Poole) (03/09/88)
From article <2866@brspyr1.BRS.Com> by tim@brspyr1.BRS.Com (Tim Northrup): >From article <186@forty2.UUCP>, by poole@forty2.UUCP (Simon Poole): >> mcvax!ukc!mupsy!liv-cs!sqrkl, Richard K. Lloyd writes >Wishlist for > >>>6) Retain the screen display when switching from or to 132 column mode, >>> rather than clearing the screen and homing the cursor. >> >> Wrong! No VT1XX, VT2XX or VT3XX compatible terminal works this way, >> all clear the screen and home the cursor. The command set of D*C >> compatible terminals has no provision for dealing with mixed length >> lines (I can think of all kind of perversions you would have to deal >> with, if you want to have a terminal with this feature). >Sorry Simon, but I use an HDS2200 (VT-220 compatible from Human Designed >Systems), that *does* retain the screen on size change. Which means that it isn't VT-220 compatible. And will miserably fail any compatibility test. ....... >It seems to work just fine. The software may not deal with it particularly >well (editors, etc), but that isn't the terminals problem, nor should it >be. Oh yes it should be, since the HDS will tell the application, that it's a VT-220 and the application will expect it (the terminal) to do EXACTLLY what a VT-220 would do. How do you program an editor if you don't know what the terminal is going to do? Ok, you say then it should send a response saying it's a HDS2200 in this and that mode, BUT then it's no longer a VT-220 terminal is it? BTW the HDS does not work the way the original poster described (the HDS does NOT have mixed length lines, it just doesn't erase the whole screen when switching modes). (I don't really think this discussion belongs in comp.sys.atari.st, that's why I've refrained from giving a LONG list of situations where everybody would admit that the HDS is broken) -- ---------------------------------------------------------------------------- UUCP: ...mcvax!cernvax!forty2!poole Simon Poole BITNET: K538915@CZHRZU1A ----------------------------------------------------------------------------