CompuServe Messages

BM <<OK, you've known everything about Amiga so far-let me try one more thing. Overscan-I notice that with "standard" overscan mode 480×352, many programs showing images through the A520 leave a black bar about 1/2 an inch on the left side of the image>> The well just ran dry. I don't have any experience with A520 & overscan. When you said 480×352, did you mean 352 pixels across & 480 scanlines down? The standard overscans for NTSC/PAL under AmigaDOS 3.x, (and I assume for AmigaDOS 2.x) are: NTSC:HiRes – 724×241 NTSC:HiRes interlaced – 724×482 NTSC:LoRes – 362×241 NTSC:LoRes interlaced – 362×482 PAL:HiRes – 724×283 PAL:HiRes interlaced – 724×566 PAL:LoRes – 362×283 PAL:LoRes interlaced – 362×566 Under 2.x & 3.x, the 362 (or 724) picture size should be the one to offer edge to edge coverage. However, before AmigaDOS 2.x, there was no standard overscan size. Some older programs offered their own 'standard' overscan, and some others also offer an additional 'maximum' overscan. Some of your software may be defaulting to the OS's overscan screens, while other programs may be opening custom screens with simply more overscan than a standard, non-overscan screen size has. Ron.