CompuServe Messages

Multisync/flickerFixer??

    09-Oct-89 08:09:24
Fm: Gregory B. Tibbs 73767,456
To: Ethan Solomita 70137,3271
Wrong-O Ethan, Workbench is still 4 colors. The non-interlaced 640×480 will update 640 pixels by 480 lines 60 times a second whereas the interlaced 640×400 only updates 30 times a second. That is where the 'flicker' comes from. So twice as much chip ram bandwidth is used as normal. So when the 640×480 non-interlaced 'productivity' mode is in effect, as much chip ram bandwidth is used as 640x400x16 colors (more if you consider that 'productivity' mode has 80 more lines). There is an internal limitation that cuts the palate down to 64 colors. The four colors possible is the maximum number that would fit within the available bandwidth. The net result is that a 640x400x4 Workbench (interlaced) would not slow down the machine but the 640x480x4 'productivity' mode Workbench will drastically slow down the machine. compensate (somewhat) for this. An application might open a 640x480x2 color (monochrome) screen (say a DTP program) and your statement would be correct. -Greg