On Wed, 21 Apr 1999, William Levak wrote: > As you change the values from their optimum level, the image begins to > waver and distort. Getting farther away, you lose sync and the picture > breaks up. Even further, and the driver circuitry (technically known as a > ramp generator) ceases to respond to the signals and the screen goes > blank. NONE of this damages the display in any way. What about the urban legends that one could damage a PC display by feeding wrong line frequencies to it? I've heard of one friend's friend whose monitor let the smoke out only after a few seconds of wrong signals. Has anyone really seen a flyback transformer or some other component that has fried because of out-of-specs frequencies? (Hmm, now when I think of it, many PAL TVs keep a little noise when fed with an NTSC signal.) My Data General fixed-frequency monitor (75 kHz/70 Hz) confirms what Bill is saying: It tolerates (terribly wrong) VGA frequencies pretty well. It just won't sync before SVGATextMode or XFree86 sets the proper frequencies. > When it comes to choosing between the information of a qualified engineer, > and gossip and rumor.... Well, there isn't really any choice. A Commodore engineer could have chosen to lie in order to protect his company. And those modern myths are fascinating, aren't they? :-) But what about floppy music, shouldn't it be able to break hardware? Are there any floppy music programs for the PET? For the C64, there is Drive Composer at <URL:http://www.funet.fi/pub/cbm/c64/diskutil/misc/>. Marko - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail email@example.com.
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