ret
</pre>
== Video memory structure ==
{|{{Prettytable|width: 700px; font-size: 2em;}}
|rowspan=2|'''Mode'''||colspan=8 style="text-align: center;"|'''VRAM byte'''||colspan=8 style="text-align: center;"|'''Displayed Pixels'''||rowspan=2|'''Definition'''
|-
|'''7'''
|'''6'''
|'''5'''
|'''4'''
|'''3'''
|'''2'''
|'''1'''
|'''0'''
|'''1'''
|'''2'''
|'''3'''
|'''4'''
|'''5'''
|'''6'''
|'''7'''
|'''8'''
|-
|0
|A0
|B0
|A2
|B2
|A1
|B1
|A3
|B3
|colspan=4|A3.A2.A1.A0
|colspan=4|B3.B2.B1.B0
|2 pixels in 16 colors
|-
|1
|A0
|B0
|C0
|D0
|A1
|B1
|C1
|D1
|colspan=2|A1.A0
|colspan=2|B1.B0
|colspan=2|C1.C0
|colspan=2|D1.D0
|4 pixels in 4 colours
|-
|2
|A0
|B0
|C0
|D0
|E0
|F0
|G0
|H0
|A0
|B0
|C0
|D0
|E0
|F0
|G0
|H0
|8 pixels in 2 colors
|-
|3
|A0
|B0
|x
|x
|A1
|B1
|x
|x
|colspan=4|0.0.A1.A0
|colspan=4|0.0.B1.B0
|2 pixels in 4 colors
|}
== Palette R,G,B definitions ==