Splitting the Atom

page 53

Graphics mode 3

In this mode the VDU display is mapped from 3072 bytes (3K). The format is 16 cells across and 192 cells down.

8000		800F	192 rows of cells = 192 pixels
8BF0		8BFF
	16 columns of cells = 128 pixels

The arrangement of the graphics cell is the same as for mode 1.

Graphics mode 4

The display is mapped from 6144 bytes (6K). The format is 32 cells across and 192 cells down.

8000		801F	192 rows of cells = 192 pixels
87E0		97FF
	32 columns of cells = 256 pixels

The arrangement of the graphics cell is the same as for mode 1.