mrose@libserv1.ic.sunysb.edu (Michael Rose) (02/04/91)
Hello everyone! The most I have been able to overscan on my sm124 monochrome monitor has been 672x480. If I set it to overscan more, the image becomes bent and wraps around the screen. In the overscan docs, it mentions that it is possible to overscan approx. 800x600 (I think) on a well adjusted monochrome monitor or a multisync. Does anyone know what adjustments have to be made to the monitor to do this? What is the highest resolution anyone has been able to overscan on the Atari monochrome or multisyncs for that matter? I was also wondering if anyone has seen or knows anything about the Reflex graphics board for the Mega's. It is a plug in card that is supposed to provide 1024x768 on the standard Atari monochrome monitor and even higher resolutions with other types of monitors. Does anyone know if it is available in the United States? Thanks!!! Sincerely, Michael Rose ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^_^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ < Michael Rose |Quack! _/.\ | "It is unnatural in a large field > < mrose@ic.sunysb.edu |Quack! /\ -===-/| to have only one shaft of wheat > < mrose@ccvm.sunsb.edu|QUACK! \____/ | and in the infinite Universe only > < mrose@sbccvm.bitnet | _||_ | one living world." - Metrodorus > v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v
wieners@quando.quantum.de (Volkmar Wieners) (02/05/91)
In article <1991Feb3.213147.24259@sbcs.sunysb.edu> mrose@libserv1.ic.sunysb.edu (Michael Rose) writes: > The most I have been able to overscan on my sm124 monochrome >monitor has been 672x480. That's ok for an normal SM124. Mine (build in 1985) does the same. Some of the newer SM124 (with the Atari logo painted on the front) should be able to show up to 704x480, but they're rare. >In the overscan docs, it mentions that it is possible to overscan approx. >800x600 (I think) on a well adjusted monochrome monitor or a multisync. Did you have the old overscan (hyperscreen) with that manual switch or the new "Autoswitch-Overscan" (AS-OS) which automatically change the solution? There is a nice solution-table in the well written AS-OS dox. 800x600 isn't mentioned there. The maximum for monochrome monitors should be 752x480 on NEC Multisync GS or a good TVM MG11. Maybe some 816x280 on color monitors (mid solution) but I don't think many use that. >Does anyone know what adjustments have to be made to the monitor to do this? You can move the picture or make it a little bit brighter but if you have left the SM124 in original state, you couldn't get more solutions by internal adjustments. I've tried it. 8-) And beware, that things inside could kill you. > I was also wondering if anyone has seen or knows anything about >the Reflex graphics board for the Mega's. Never heard of that here in Germany. There's a card for Megas called "Megascreen" which make a little bit more in monochrome than AS-OS. But you need a Mega (don't have one) and a mulitsync (also missed) to use it. AS-OS works with every ST (except STE and TT), every monitor and have the better software, i think. cu, Volkmar -- Volkmar Wieners Uucp: ...uunet!unido!quando!wieners Dortmund Eunet: wieners@quando.quantum.de FRG Fidonet: 2:241/5800.5 Mausnet: DO
hyc@math.lsa.umich.edu (Howard Chu) (02/14/91)
You got 672x480, I got 688x480 on my SM124. I got 736x480 using a multisync display (Magicsync+, .28mm dot pitch, supposed to be capable of 1024x768 rez). I also got 416x280 and 832x280 in color modes on the multisync. So what's it take to get more vertical rez in color - interlace? -- -- Howard Chu @ University of Michigan Flame all you want - we'll take more.
lunnon@qut.edu.au (02/19/91)
In article <1991Feb13.223042.1968@math.lsa.umich.edu>, hyc@math.lsa.umich.edu (Howard Chu) writes: > You got 672x480, I got 688x480 on my SM124. I got 736x480 using a multisync > display (Magicsync+, .28mm dot pitch, supposed to be capable of 1024x768 rez). > I also got 416x280 and 832x280 in color modes on the multisync. > > So what's it take to get more vertical rez in color - interlace? Actually, I designed a little (< $5) hardware hack a couple of years ago which added an interlace mode to the ST. It was interesting to see a flicker mode on an ST, anyway this $5 hack gave 320*400 640*400 640*800 interlaced modes to your ST. Actually mono mode (640*800) was actually watchable 'cause of the 72 Hz V scan rate. Add to that overscan and I guess 736*960 is possible :-) This actually was just a gizmo that plugged in into the monitor port between the ST and your monitor and consisted of two ICs a 74ls74 and a 74ls122 I think , The object is to delay the vertical sync pulse by half a line relative to the horizontal sync pulse on every odd, given there was some way to detect which field was which (GPO) one could flip screens each field to generate high rez displays. It turned out that I just could not stand the flicker, so the board is an unusual curiosity in the bottom of a junk box somewhere. BOB R.Lunnon@qut.edu.au > -- > -- Howard Chu @ University of Michigan > > Flame all you want - we'll take more.
vsnyder@jato.jpl.nasa.gov (Van Snyder) (02/20/91)
Does anybody know what signal is on pin 10 of the RF modulator in an old (rev B board) 520ST? It also appears on pin 2 of the monitor jack. I tried using it for Overscan, but it didn't work, so I assume it's not composite synch. There's enough unused logic in my ST to compute composite synch without adding two diodes, a resistor and a transistor: U14 has a spare 2-input NAND, U40 has a spare 2-input NOR, and U35? has two spare invertors. That's ALMOST enough to control Overscan with GPO instead of a switch. -- vsnyder@jato.Jpl.Nasa.Gov ames!elroy!jato!vsnyder vsnyder@jato.uucp
szhu@tasha.poly.edu (A1 shu bin zhu (cs) ) (02/28/91)
How did you get the extra resolutions on the ST?