01:3501:35, 22 November 2010diffhist−169
VIC-20
Using 200 double-height characters for 160x160 hi-res is a good compromise, not a strict limit. The Super Expander moved BASIC RAM to make use of the extra 3K of RAM, regardless of gfx mode.
19:2719:27, 12 July 2010diffhist0
ABC 80
The correct horizontal resolution is 78, as the first column of a line can never be used for graphics. Each line starts in text mode and a control character is needed to switch to graphics mode.
01:3501:35, 22 November 2010diffhist−169
VIC-20
Using 200 double-height characters for 160x160 hi-res is a good compromise, not a strict limit. The Super Expander moved BASIC RAM to make use of the extra 3K of RAM, regardless of gfx mode.
19:2719:27, 12 July 2010diffhist0
ABC 80
The correct horizontal resolution is 78, as the first column of a line can never be used for graphics. Each line starts in text mode and a control character is needed to switch to graphics mode.