> Am I to understand that only Chip RAM could be used for sound digitizing and video? So for example an Amiga 2000, with 8 megabytes of RAM could only use Chip RAM for sound digitizing and Video page flipping for example? Wasn't the OSC limited 512K then latter 1,024K?
Essentially, sound and video can only be played/displayed from chip RAM. Since audio bandwidth is very low, samples can easily be swapped from fast to chip in realtime. The same can be done with video/anims, but it's much more CPU demanding.
Digitizing is not done through the chipset, so there's no limitation to where the data is stored.
> PC cards: CGA, EGA, MCGA, and VGA. Was the video RAM on these cards all that could be used for Video or the PC use the PC RAM for video and audio.
Video: yes. The same technique applies: copying video data in realtime helps circumventing the limitations.
Audio has nothing to do with VGA and is played from system memory.
