4 Commits

Author	SHA1	Message	Date
drochner	3a08ae9402	always use unsigned numbers for screen positions (for sanity - the libkern ... min() et al. did unsigned comparisions before) make ROWS_ABOVE / ROWS_BELOW return signed values, the negative results occur if the cursor is outside the scrolling region	1998-12-04 20:48:04 +00:00
drochner	8e12b6c020	stricter parameter check for scrolling regions ... (PR kern/5954 by Dave Huang <khym@bga.com>)	1998-08-12 20:04:12 +00:00
drochner	bbb4f765cc	Improvements to the VT100 emulation: ... -display DEC special graphics and DEC technical characters as far as possible -implement the font switching controls (need documentation!) -behave well if double-width characters are requested -simplify the state machine: store CSI command modifiers in variables instead of dedicating own states to each of them	1998-06-26 21:20:34 +00:00
drochner	68aabb6d21	First cut on a VT100 emulation. ... It should be able to parse escape sequences up to VT300, but not everything is implemented. Most notably, there is no font handling - all displayable characters are handed to the graphics driver. To solve this, a serious interface change to the graphics driver is needed (Unicode?).	1998-06-20 19:17:47 +00:00