muts@fysaj.fys.ruu.nl (Peter Mutsaers /1000000) (02/06/91)
On my monitor (a large color one) there is a type number, 98785a. When I look at the system configuration using /etc/dmesg, it says however that my display type is hp98549. Is it possible that these differ? Or is there a way to let the system know it is a different one? It seems a bit strange to me as the hp98549 is only a 6 bitplane 1024x768 display. But I thought my monitor could handle much more. Could anyone who knows something about it please send email, as I will be away for about a week soon, and I might miss news. Thanks in advance, -- Peter Mutsaers email: muts@fysaj.fys.ruu.nl Rijksuniversiteit Utrecht muts@fys.ruu.nl Princetonplein 5 tel: (+31)-(0)30-533880 3584 CG Utrecht, Netherlands
rjn@hpfcso.HP.COM (Bob Niland) (02/07/91)
re: > On my monitor (a large color one) there is a type number, 98785a. > When I look at the system configuration using /etc/dmesg, it says > however that my display type is hp98549. Is it possible that these > differ? Or is there a way to let the system know it is a different > one? It seems a bit strange to me as the hp98549 is only a 6 bitplane > 1024x768 display. But I thought my monitor could handle much more. 98785A is the product number of the 16-inch monitor. The 98785A works with a variety of 1024x768 color video interfaces, representing implementations of between 4 and 8 planes. The 98549A is a 1024x768x8 (yes, eight) color video interface. It works with a variety of 1024x768 color monitors, in 16- or 19-inch sizes. Regards, Hewlett-Packard Bob Niland Internet: rjn@FC.HP.COM 3404 East Harmony Road UUCP: [hplabs|hpfcse]!hpfcrjn!rjn Ft Collins CO 80525-9599 > Could anyone who knows something about it please send email, as I will > be away for about a week soon, and I might miss news. Done.
robs@hpuamsa.neth.hp.com (Rob Slotemaker CRC) (02/07/91)
When you can read your email, you can read this notesfile too, I thought (:-)). The 98785A is a 16" high resolution monitor with a RGB interface. The 98549A is a high resolution graphics board for Series 300 workstations with 1024 x 768 resolution and 6 color planes. This interfaces determines the number of colors which can be displayed. The system can only determine what interface the system has and not what monitor is connected to the RGB cable ! Best regards, Rob Slotemaker, Dutch CRC
franks@hpuamsa.neth.hp.com (Frank Slootweg CRC) (02/08/91)
Rob Slotemaker CRC writes : > The system can only determine what interface the system has and not > what monitor is connected to the RGB cable ! Of course this is true. Rob isn't a member of my team for nothing! :-) That the system can not determine what interface is connected to the RBG cable is not a limitation. An analogy: The loudspeaker of your audio system does not determine what you will hear, the tuner does. The tuner will not know if the speaker is connected or not and will work perfectly without a speaker and so will the interface without a monitor. The absence/presence of the speaker only determines if you will hear anything, not what. Likewise the absence/presence of the monitor only determines if you will see anything, not what. Lots of people are confused about this. The above analogy often helps. I hope it helps you too. And to prevent problems: The above is meant to explain/educate, not to belittle. Best regards, Frank Slootweg, same CRC (Customer Response Center). P.S. I know that there is an amplifier between the tuner and speaker.
myhui@bnr.ca (Michael Hui) (02/09/91)
In article <28510022@hpuamsa.neth.hp.com> franks@hpuamsa.neth.hp.com (Frank Slootweg CRC) writes: > That the system can not determine what interface is connected to the >RBG cable is not a limitation. An analogy: The loudspeaker of your audio >system does not determine what you will hear, the tuner does. >The tuner will not know if the speaker is connected or not and will work >perfectly without a speaker and so will the interface without a monitor. The reason you want the computer to know what kind of monitor is connected to the video system's output is to allow the computer to program the video system's output to suit a variety of monitors that could be connected to that output. Even the Apple Macintosh (I think) can do that.
hardy@golem.ps.uci.edu (Meinhard E. Mayer (Hardy)) (02/10/91)
In article <1991Feb9.135625.4241@bnr.ca> myhui@bnr.ca (Michael Hui) writes: >> The reason you want the computer to know what kind of monitor is connected >> to the video system's output is to allow the computer to program the video >> system's output to suit a variety of monitors that could be connected to that >> output. Even the Apple Macintosh (I think) can do that. The computer talks to the video card; if there is a bijective correspondence between cards and monitor, that suffices; otherwise, e.g., when you can connect a 16in or 19in monitor to the same card, you store that info in some configuration file, e.g., /usr/lib/X11/X0.screens or something like that. I never had any problems (though I don't have any fancy monitors either). As regards the Macintosh: doesn't each dispaly have its own card, and don't you have to go to some "Control Panel" and tell Mac wher its monitors are (if there are more than one)? Hardy Mayer ----****---- Professor Meinhard E. Mayer Department of Physics University of California Irvine, CA, 92717 USA
myers@hpfcdj.HP.COM (Bob Myers) (02/12/91)
>> That the system can not determine what interface is connected to the >>RBG cable is not a limitation. An analogy: The loudspeaker of your audio >>system does not determine what you will hear, the tuner does. >>The tuner will not know if the speaker is connected or not and will work >>perfectly without a speaker and so will the interface without a monitor. >The reason you want the computer to know what kind of monitor is connected >to the video system's output is to allow the computer to program the video >system's output to suit a variety of monitors that could be connected to that >output. Even the Apple Macintosh (I think) can do that. But only because different timings or formats are supported by the digital hardware in question. The HP graphics cards are all single-timing; for example, the 98547A supports ONLY the 1024x768 60 Hz timing, the 98550A is ONLY the 1280x1024 60 Hz timing, and so forth. Once this is determined, it really doesn't matter which monitor is connected to the far end of the RGB cable, other than making sure that the monitor can handle that video timing. Your choice is typically one of size only. For a further example, the 98547A can properly drive EITHER the 98785A (16" 1024x768) or 98753A (19" 1024x768), but NOT the 98789A or 98754A (the 1280x1024 versions of these same size monitors, respectively). In the PC world, this issue is further complicated by the presence of "multi-sync" monitors which can adapt themselves automatically to a number of timings; examples are the NEC 3D or 4D, or HP's 1187A. These can handle the outputs of a number of different display boards, but again it's knowing the BOARD'S capabilities that are important to the system - not the monitor. Bob Myers KC0EW HP Graphics Tech. Div.| Opinions expressed here are not Ft. Collins, Colorado | those of my employer or any other myers@fc.hp.com | sentient life-form on this planet.