Robin Gravel's Blog - Exploring Colecovision screen modes

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I spent all the day if I can use all screen modes on Colecovision

Modes 1 and 2 are easy.


But I can't get screen o and 3.


Mode 0:

Reg/Bit 7 6 5 4 3 2 1 0
0 - - - - - - M2 EXTVID
1 4/16K BL IE M1 M3 - SI MAG


0 0 0 0 0 0 0 0
1 0 1 0 0 0 0 0

vdp_out(0,0);
vdp_out(0,0xA0);

I disabled BL because screen 0 has no sprites anyway.
This code doesn't work


Mode 3


Reg/Bit 7 6 5 4 3 2 1 0
0 - - - - - - M2 EXTVID
1 4/16K BL IE M1 M3 - SI MAG

0 0 0 0 0 0 0 0
1 1 1 0 1 0 0 0


vdp_out(0,0);
vdp_out(0,0xE8);


This code doesn't work either


I expect the letters in mode 0 would be smaller

And mode 3, sprites would be look with big pixels.


I will stick with mode 2 since, the characters are big enough and the sprites are just fine.

http://atariage.com/forums/blog/56/entry-13236-exploring-colecovision-screen-modes/