viking@iuvax.UUCP (Jon W. Backstrom) (10/30/87)
Has anyone else noticed small horizontal bars about 2-3 pixels from the top of the screen when using the 256 color mode on Apple's Mac II video card? I thought this was something specific to my system (blown memory on the video card or something), but now I've seen it on three other Mac II displays. I didn't notice it until I upgraded the Mac II to 5 Mb of memory. After that, if I used *any* video mode with more than 2 colors, I get an interesting video artifact... A CLOCK!! If I use the 4 color mode, I can see a tiny clock with full hour:minute:second format. As you progress to 16 and 256 colors, the display simply looks 'gliched'. I tried removing "Menu Clock" from the system folder, thinking it was a bug from that program but that wasn't it. What is it?! Has anyone else seen this phenomenon? ------------------------------------------------------------------------------- | Jon W. Backstrom "Yah sure...we gonna have fun, you bet!" | | Computer Science Department | | Indiana University UUCP: {ihnp4,pyramid,rutgers}!iuvax!viking | | Lindley Hall 101 ARPA: viking@iuvax.cs.indiana.edu | | Bloomington, IN 47405 | | "The world has arrived at an age of cheap | | (812) 335-2849 (Office) complex devices of great reliability; and | | (812) 336-3660 (Home) something is bound to come of it." | | - Vannevar Bush (1945) | -------------------------------------------------------------------------------
lsr@apple.UUCP (Larry Rosenstein) (11/02/87)
In article <4222@iuvax.UUCP> viking@iuvax.UUCP (Jon W. Backstrom) writes: > >I didn't notice it until I upgraded the Mac II to 5 Mb of memory. After >that, if I used *any* video mode with more than 2 colors, I get an >interesting video artifact... > >A CLOCK!! If I use the 4 color mode, I can see a tiny clock with full This indicates a program that is writing directly to the screen. The your monitor is set of more than 2 colors/grays, then the code which writes directly to the screen will not work properly because the display memory is organized differently. You will see this effect in other places (eg, MacPaint). Until the offending program is updated, there is nothing you can do but change your screen to 2 color mode. -- Larry Rosenstein Object Specialist Apple Computer AppleLink: Rosenstein1 UUCP: {sun, voder, nsc, mtxinu, dual}!apple!lsr CSNET: lsr@Apple.com
waltervj@dartvax.UUCP (walter jeffries) (11/04/87)
In article <4222@iuvax.UUCP> viking@iuvax.UUCP (Jon W. Backstrom) writes: >: >A CLOCK!! If I use the 4 color mode, I can see a tiny clock with full >hour:minute:second format. As you progress to 16 and 256 colors, the display >simply looks 'gliched'. I tried removing "Menu Clock" from the system folder, >thinking it was a bug from that program but that wasn't it. I got that with Jclock on our MacII. Make sure it is not in the System folder or the System itself. -Walter.