How do I write to graphics memory in qbasic? (v1.1)

: How do I write to graphics memory in qbasic? (v1.1)<br>
: <br>
<br>
Use poke and peek...example<br>
<br>
SCREEN 13<br>
DEF SEG = &HA000 ;Screen segment<br>
x=100<br>
y=100<br>
POKE y * 320 + x, col ;draw it<br>
<br>
This is also a lot faster than PSET...<br>
<br>
PS. The formula for offset address in 13H mode is Y*320+x<br>
<br>