Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!rutgers!cbmvax!grr From: grr@cbmvax.cbm.UUCP (George Robbins) Newsgroups: comp.sys.amiga Subject: Re: Future Amiga Video Message-ID: <1812@cbmvax.cbmvax.cbm.UUCP> Date: Thu, 30-Apr-87 18:57:08 EDT Article-I.D.: cbmvax.1812 Posted: Thu Apr 30 18:57:08 1987 Date-Received: Tue, 5-May-87 04:38:40 EDT References: <8704280904.AA22403@cogsci.berkeley.edu> Reply-To: grr@cbmvax.UUCP (George Robbins) Organization: Commodore Technology, West Chester, PA Lines: 98 Keywords: A2000 video In article <8704280904.AA22403@cogsci.berkeley.edu> bryce@COGSCI.BERKELEY.EDU (Bryce Nesbitt) writes: >> Actually, the requests I've heard for chroma-keying work the other way, >> with video being switched based of the color of the external video >> input [...] This is really an analog video function. >Actually it depends just what you want to do... some may wish/need to spend >more $$$ on their analog that C-A can for every production unit. Agreed. I was commenting that the availability of all the digital color bits didn't have any bearing on chroma-keying as we understood the primary desire for it. >This entire respose actually belongs to a PBS employee without net-access. >It gives comments and worries about the Amiga 2000 from the standpoint of >needs in production work. She currently uses a 1000 with 2 megs external >ram an a extra DMA comtroller for data swapping. The station is >considering several 2000's: > >--------strong needs/wishes------ > >Digital RGB on the video slot connector with 4 bits/gun and an extra >4 pins/gun of nothing for future expansion. The 4 bits/gun are there. I woudn't expect to see 8/bits gun available externally. If you were to widen the color table, you'd almost certainly got to an integrated color table/video DAC solution. >If the extra half meg of memory is to be slow fast memory then a jumper >or kludge to disable it so some true fast memory can be added. With the >Amiga 1000 we are already using we need fast memory to keep the frame >rate up when using high-res overscan interlace. It is unacceptable for >any of the slow fast memory to get allocated. There is a jumper location specifically for this purpose, if you feel your application demands it. [Editorial: THIS is what I >was talking about on the 500/They specify MEMF_FAST and expect to get it >-Bryce] This is a software problem (say's a hardware person). There's a program to delete the C0 memory from the "FAST" chain, if that's enought to solve your problem. In the long run, I'm afraid the "FAST" notion may need refinement, as there is no simple way the system software can be sure some external (or internal) memory is really fast. All it can really say it isn't chip memory. >We run out of chip memory first... We're working on this. >We run out of colors second... (though HAM with twice the bandwidth would >probably about settle it) No immediate hope here... >Better DESCRIPTIONS of the overscan support, particularly in relation to >intuition and hot spots on gadgets. The best be here is the amiga.dev public group on bix. There have a number of discussion between the people who have made overscan do what they want, and those trying to find out how to do so. >----------other items---------- >Tiny jumper on PCB to place +5 volts on the parallel port. If you want >to get fancy you could spend as much as two PCB holes implementing this. There's a resistor there that you can replace with a jumper if you feel compelled to do so. Don't try to plug in a standard IBM printer cable/printer if you do, because there is *NO* +5 at all on the IBM PC standard printer connector. >I LOVE the modular (RJ-11) jack on the 1000's keyboard. First thing I >did was go to Radio Shack and get a 25 footer. Too bad it's gone... Sorry, PC shape, PC style keyboard, PC keyboard connector. It's not too much harder to make up an extension cord and we don't have to worry about whether the random phone cord you pick up is wired correctly or will meltdown and/or blow your keyboard. >MORE DISK SPACE! I heard sony has a 2 meg drive out, also one that runs at >600 RMP. Yes, I will pay more... must read/write older disks, however. Maybe, but the controller doesn't support this stuff now. If you're doing something serious, get a hard drive. Floppies are ok for program interchange, but as long as a floppy is smaller than your RAM size, they sure as hell aren't mass storage. They don't exactly make the ideal hard disk backup device either. Given some software developement, our hard disk/SCSI controller should support reasonably effective cartridge tape drives. -- George Robbins - now working for, uucp: {ihnp4|seismo|rutgers}!cbmvax!grr but no way officially representing arpa: cbmvax!grr@seismo.css.GOV Commodore, Engineering Department fone: 215-431-9255 (only by moonlite)