English Amiga Board - View Single Post - EHB, HAM6 and HAM8 demonstration pictures?

thellier · 21 October 2016, 09:48

Hello

@pandy71
>Isn't better to define problem that 2 LSB are from CLUT

No because you can access only 64 colors from the palette in Ham8 so you cant recover ALL the possibles values from 0 to 255 but only 64 ones

>2+2+2=6 bits and 6+6+6=18 ; 6+18 =24.
This formula would let suppose that if it have been load a color palette (so with a 8 bits precision) in a pixel then you can modify in the next pixel ONLY the 6 MSB bits for (say) the red channel: but this is not the case because it REPLACE the (say) red channel so you lose the 2 LSB bits

Alain

21 October 2016, 09:48	#37
thellier Registered User Join Date: Sep 2011 Location: Paris/France Posts: 274	Hello @pandy71 >Isn't better to define problem that 2 LSB are from CLUT No because you can access only 64 colors from the palette in Ham8 so you cant recover ALL the possibles values from 0 to 255 but only 64 ones >2+2+2=6 bits and 6+6+6=18 ; 6+18 =24. This formula would let suppose that if it have been load a color palette (so with a 8 bits precision) in a pixel then you can modify in the next pixel ONLY the 6 MSB bits for (say) the red channel: but this is not the case because it REPLACE the (say) red channel so you lose the 2 LSB bits Alain