hood@cbmvax.commodore.com (Scott Hood) (05/02/90)
In article <1990May1.213054.16935@ux1.cso.uiuc.edu> menelli@cs.uiuc.edu (Ron Menelli) writes: >Despite all of the wonderful A3000 information floating around thanks to >Dave Haynie and the rest of the crew, I still have managed to come up with >a few questions no one has covered yet... > >1). I have a pretty good idea about what kind of output the de-interlacer > gives for each graphics mode, but I'm a little unclear on the PAL > resolutions. Any A3000 can do PAL mode, right? I believe I've seen > software that switches between the modes (PALBoot ?), so I'm assuming > that is how you can get to these modes. The real question is, is the > de-interlacer output for PAL mode still at 31.5 KHz, or is it something > else? And if it is 31.5 KHz, how does it handle the extra vertical > resolution? By using overscan? Any A3000 can output PAL video modes, so that the display enhancer can either de-interlace or scan-double the output to produce a 31.25Khz horizontal scan rate and a 50Hz vertical rate. Any multiscan monitor can handle this if it is even close to being VGA compatible. To access the PAL video modes the user will open the `monitor' drawer and click on the PAL monitor icon. Then in the `prefs' drawer the user can run `wbscreen' and select the default screen modes or the now present PAL video modes. The NTSC video modes are 15.734Khz (31.46Khz de-interlaced) horizontal and 60Hz vertical FYI. Scott > >2). I plan on getting a NEC MultiSync 3D monitor (regardless of whether the > PAL resolutions require it) for future compatibility reasons (can you > say ULowell?) Does anyone have any experience with this monitor or just > happen to know if it would work correctly? The problems I could forsee > are: Weird cable needed (ala DiamondScan), interlace not supported (for > 1280x400 and 640x960 modes), anything else I've missed(?) > >Thanks in advance for any help, >Ron "I want my A3000 NOW!!!" Menelli >menelli@cs.uiuc.edu
daveh@cbmvax.commodore.com (Dave Haynie) (05/03/90)
In article <1990May1.213054.16935@ux1.cso.uiuc.edu> menelli@cs.uiuc.edu (Ron Menelli) writes: >1). I have a pretty good idea about what kind of output the de-interlacer > gives for each graphics mode, but I'm a little unclear on the PAL > resolutions. Any A3000 can do PAL mode, right? I believe I've seen > software that switches between the modes (PALBoot ?), so I'm assuming > that is how you can get to these modes. Same basic mechanism, though of course supported in 2.0 via a preferences editor. An NTSC machine in PAL mode will be 1% off, as will a PAL machine in NTSC mode. Only an issue if you're genlocking. > The real question is, is the de-interlacer output for PAL mode still at > 31.5 KHz, or is it something else? It is still at 31.5KHz > And if it is 31.5 KHz, how does it handle the extra vertical resolution? By using > overscan? The same way PAL uses the basically same horizontal frequency as NTSC and still gets the extra lines -- by increasing the vertical display time. So NTSC gives you 60Hz vertical refresh, PAL gives you 50Hz. >2). I plan on getting a NEC MultiSync 3D monitor (regardless of whether the > PAL resolutions require it) for future compatibility reasons (can you > say ULowell?) We've used a number of NECs here, and never had a problem to my knowledge. I think they're among the best. > interlace not supported (for 1280x400 and 640x960 modes) I'm not sure if anyone's tried those modes with the NECs. I'm still using a Moniterm, or I probably would have tried those out myself. >Thanks in advance for any help, >Ron "I want my A3000 NOW!!!" Menelli >menelli@cs.uiuc.edu -- Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy "I have been given the freedom to do as I see fit" -REM