[Coco] Video band width and accessing video memory

[William Astle]

On 2019-06-02 11:32 a.m., tim franklinlabs.com wrote:
> One thing I'd like to point out is that your math is slightly off. 320
>     * 200 * 4 is correct but there's four pixels per bite so the final
>     calculations is 18000 bytes not 36000.

Actually, 16 colour modes only have 2 pixels per byte. There is, in 
fact, a 320x225 16 colour mode. Thus, his resulting number is correct 
even if his listed math is wrong.