Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!isis!nyx!bscott From: bscott@nyx.UUCP (Ben Scott) Newsgroups: comp.sys.amiga Subject: Re: NTSC-PAL Summary: Pretty much it IS Message-ID: <1731@nyx.UUCP> Date: 31 Jul 90 02:19:33 GMT References: <1895@ndmath.UUCP> <1990Jul25.040811.17050@uokmax.uucp> <52072@iuvax.cs.indiana.edu> Reply-To: bscott@nyx.UUCP (Ben Scott) Organization: Public Access Unix - University of Denver Lines: 41 [since no one else has responded yet:] In article <52072@iuvax.cs.indiana.edu> amhartma@silver.ucs.indiana.edu (Andy Hartman - AmigaMan) writes: >I thought that PALBoot and programs like it just SIMULATED a PAL display. >Obviously, an NTSC machine can't be turned into PAL without hardware changes. >But don't these types of programs (PALBoot, etc.) just open an NTSC screen >which is just an interlaced screen with more vertical rows? Seems to me that >a FlickerFixer would make this display even better to see. Anyway, with >PALBoot, I still lose the last few lines on the bottom of the screen sometimes. No - with the Super Agnus in PAL mode, even with an NTSC machine, the graphics are PAL. The horizontal lines are spaced closer together, and it forces a 1084 to follow the new sync so you get the additional lines in virtually the same physical space on the screen. The mouse pointer seems "squished" in the vertical direction. The vertical blanking interval and even the power supply frequency as reported by Kramden SI is 50 hz. The clock runs somewhat faster. European demos run at 5/6th the speed they used to run when played in NTSC. Obviously, not EVERYTHING is changed, but then not everything is really that different. Every important difference for most applications is within the Agnus chip, or controlled by it. Workbench follows suit opening a PAL screen if you boot in PAL rather than just changing during runtime. This also brings other programs like CED, Diskmaster, and JRComm along so you really can use the 25% extra screen real estate (with virtually no additional system overhead). I'm sure other programs also detect PAL, those are just the ones which do that I use mostly. > | - Batman (original) (yeah! Adam West... the REAL Batman!) . <<<>>> -- .---------------------------------------------------------------------------. |Ben Scott, professional goof-off and consultant at The Raster Image, Denver| |Amiga UUCP node domain: bscott@vila.denver.co.us Else: bscott@nyx.cs.du.edu| |FIDO point address 1:104/421.2, or call the Arvada 68K BBS at (303)424-9831| |"Don't embarrass us..." "Have I ever?" - Buckaroo Banzai | *AMIGA POWER* | `---------------------------------------------------------------------------'