Editing BASIC 8 (section)

===Notes===
# {{note|vdc-vs-vic-ii}} The VDC was programmed by writing commands to and reading status messages from a single [[hardware register|control register]] and transferring data between system RAM and the chip's dedicated video RAM (16 or 64&nbsp;KB, depending on C128 version) via a single data register, following a relatively complex protocol{{snd}} a laborious and slow procedure compared with the straightforward use of the several discrete, [[memory map]]ped control/status registers the shared system/video memory setup of the VIC-II.  Many programmers took advantage of a VDC control [[machine code|primitive]] buried deep within the part of the [[KERNAL]] that controlled the 80 column video display, rather than writing their own primitive.