Sinclair QL User Manual

•
red
contrast
SCreen Output
•
If you write:
INK 2,4
the miX colour is formed from the two codes 2 and 4. We will call these choices colour
and contrast'
INK colour, contrast
You can find out what the stipple effects are by trying them but we give more technical
details
below.
100 REMark CoLour/Contrast
110 FOR coLour = 0 TO 7 STEP 2
120 PAPER coLour: CLS
140 FOR cant rast = 0 TO 7 STEP 2
150 BLOCK 100,50,40,50,coLour,contrast
160 PAUSE 50
170 END FOR contrast
180 END FOR coLour
If you wish to try different stipples you can add a third code number to the colour
specification.
For example:
INK 2,4,1
would specify a red and green horizontal stripe effect A block of four pixels would be:
•
The possible effects are shown using red
and contrast D.
12/84
Code Name
Effect
0
Single pixel of contrast
Horizontal Stripes
2
Vertical Stripes
3 Chequerboard
~
Stipple Patterns
65

Sinclair QL Specifications

General

Processor	Motorola 68008
Clock Speed	7.5 MHz
RAM	128 KB (expandable to 640 KB)
ROM	48 KB
Operating System	Sinclair QDOS
Release Year	1984
Storage	Microdrive tape loop
Graphics	256x256 pixels, 8 colors
Ports	RS-232, ROM cartridge
Sound	Beeper (internal speaker)