Appendix 1

Mode characteristics

Table I below gives the text, character set, graphics and colour capability of

each of the eight standard screen modes and their corresponding 'shadow'

screen modes.

Information relating to the default colour assignments for screen modes 0 - 6

and their corresponding 'shadow' screen modes is given in Table 2. A change of

mode always results in the selection of a white foreground and a black

background for both text and graphics (if available).

Table 1

Mode Text Rows Text columns Character Set Graphics Pixels Colours
0 (128] 32 80 ASCII 640 x 256 2
1 (129} 32 40 ASCII 320 x 256 4
2 (130) 32 20 ASCII 160 x 256 16
3 (131) 25 80 ASCII -- 2
4 (132) 32 40 ASCII 320 x: 256 2
5 (133) 32 20 ASCII 160x256 4
6 (134) 25 40 ASCII - 2
7 (135) 25 40 TELETEXT (see Appendix 2)

App 1 .1