The Acorn Archimedes had twenty one screen modes, including the eight of the BBC Model B, allowing different combinations of text columns, text rows, graphics resolution and number of colours on screen. These were:
Mode	Graphics Resolution (Pixels)	Text Columns x Rows	Max Colours on Screen	RAM Needed
0	640 x 256	80 x 32	2	20 KB
1	320 x 256	40 x 32	4	20 KB
2	160 x 256	20 x 32	16	20 KB
3	Text only	80 x 25	2	16 KB
4	320 x 256	40 x 32	2	10 KB
5	160 x 256	20 x 32	4	10 KB
6	Text only	40 x 25	2	8 KB
7	Text only	40 x 25	8	1 KB
8	640 x 256	80 x 32	4	40 KB
9	320 x 256	40 x 32	16	40 KB
10	160 x 256	20 x 32	256	80 KB
11	Text only	80 x 25	4	40 KB
12	640 x 256	80 x 32	16	80 KB
13	320 x 256	40 x 32	256	80 KB
14	Text only	80 x 25	16	80 KB
15	640 x 256	80 x 32	256	160 KB
16	Text only	132 x 32	16	132 KB
17	Text only	132 x 25	16	132 KB
18	640 x 512	80 x 64	2	40 KB
19	640 x 512	80 x 64	4	80 KB
20	640 x 512	80 x 64	16	160 KB