craig@unicus.UUCP (Craig D. Hubley) (06/24/87)
>>I understand the A500 has some kind of monochrome port on the back that was >>not available on the 1000. Does this mean if I buy an A500, I'll be able to >>get good high quality (jitter free) 640 X 400 resolution on an inexpensive >>monochrome monitor? > >Yes, this is essentially true. What has happened (and George correct me >if I am wrong), is that the Amiga 500's composite video output is monochrome. >HOWEVER, they did not just 'turn off' the Color Burst, rather they >mix Red, Green, and Blue at a fixed ratio to generate true gray scales >rather than simple colorless colors. What this means is... [explanation] What about the 2000? Can you get this TERRIFIC gray-scale monochrome mode from it, too, somehow. And is there a quick-and-easy way to do it on a 1000? I say great A1000 monochrome 640x400, on a relatively cheap high- persistence monochrome monitor, but I didn't work with it for any length of time, so I don't know if you'd eventually notice jitter. Now, how hard could it be, given a 60Hz monitor, to make some sort of delay device to take NTSC output and change it to 400-line non-interlace? Think about it. All you have to do is grab the first lines, hold 'em in some sort of a delay loop (capacitors ?), and send 'em out in sync with the new, incoming ones. All of these go out in another delay loop, and get repeated the next refresh. The one after that, the next new refresh is ready. So you double the bandwidth, while refreshing 30 Hz twice. How 'bout it, hardware hacks? Chips, capacitors, copper wire shunts of just the right length? Lesse, a nanosecond is about a foot long, so a sixtieth of a second is about... 1.7 million meters. Hmmm. Maybe we should all bounce our output off a satellite. Sooooooooo, what monitors do this great grey-scale stuff? And how do I get my A1000 to do it? And will the A2000? Seriously, that'll kick ass in the business market. And for us LISP workstation hacks, who like 1000 x 800 mono screens. Craig Hubley, Unicus Corporation, Toronto, Ont. craig@Unicus.COM (Internet) {seismo!mnetor, utzoo!utcsri}!unicus!craig (dumb uucp) mnetor!unicus!craig@seismo.css.gov (dumb arpa)
keithd@cadovax.UUCP (Keith Doyle) (06/30/87)
In article <688@unicus.UUCP> craig@unicus.UUCP (Craig D. Hubley) writes: >Now, how hard could it be, given a 60Hz monitor, to make some sort of delay >device to take NTSC output and change it to 400-line non-interlace? >Think about it. All you have to do is grab the first lines, hold 'em in >some sort of a delay loop (capacitors ?), and send 'em out in sync with >the new, incoming ones. All of these go out in another delay loop, and >get repeated the next refresh. The one after that, the next new refresh >is ready. So you double the bandwidth, while refreshing 30 Hz twice. Ah, It's been done. Several of the larger TV manufacturers, Sony, Hitatchi, etc. have models that will buffer the incoming video to produce 60hz non-interlaced TV from standard NTSC transmissions. And this is full color. I've also heard that somebodys chips will 'interpolate' either inbetween lines, or when movement occurs, I'm not sure whitch. Details on that are a little sketchy I think. Now the big question is, is are these models actually out at all yet, or promised RSN, or just out in Japan, not yet in the US or what, and what are the model numbers and $$$ figures? Keith Doyle # {ucbvax,ihnp4,decvax}!trwrb!cadovax!keithd # cadovax!keithd@ucla-locus.arpa Contel Business Systems 213-323-8170