Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!usc!elroy.jpl.nasa.gov!decwrl!pa.dec.com!rust.zso.dec.com!shlump.nac.dec.com!sousa.enet.dec.com!pinbot.enet.dec.com!ervin From: ervin@pinbot.enet.dec.com (Joseph James Ervin) Newsgroups: comp.sys.handhelds Subject: RE: New HP48SX Screen Dissolver Message-ID: <898@sousa.enet.dec.com> Date: 7 Mar 91 13:15:45 GMT References: Sender: newsa@sousa.enet.dec.com Reply-To: ervin@pinbot.enet.dec.com (Joseph James Ervin) Organization: Digital Equipment Corporation Lines: 38 Branson Blair asks: > Could you please give a short program using it? > I tried forexample < (a grob) PICT STO {} PVIEW 1 (a grob) DISS> > it replaced the grob in PICT but with no visual effect > }:)???? I tried a bunch of other ways too but just the same > result. I even tested the speeds and they were different by about > 5 times , ...... I think its a neat thing ... > I think a simmple program example would clear up my confusion. > Thanks from, > Branson The problem that you're having is one that stumped me for a few minutes, until I determined that the problem was not in DISS, but rather in how I was using the PVIEW function. (Read on...) In your program, you are using an empty list as the argument for PVIEW. This is your problem. Instead of an empty list, use {#0d #0d}. The empty list tells PVIEW to go into GRAPH mode interactively. What is happening is that the DISS function isn't even executing until you exit GRAPH mode, so at the time that DISS is doing its magic, you are no longer displaying PICT. You should probably also put in a "7 FREEZE" at the end of your program so the final display will stay on the screen. Otherwise it will vanish as soon as DISS finishes. So to summarize, change your program to this: << (a grob) PICT STO {#0d #0d} PVIEW 1 (a grob) DISS 7 FREEZE >> That should give you the effect you're looking for. Keep in mind that DISS currently requires GROB and PICT sizes of 131x64, which is the default size. >>>Joe Ervin P.S. What ROM revision do you have? I'm curious to make sure that DISS works properly with all the revisions out there.