please,with screen memory mapping the part that confuses me is "Set the (col % 16)*th* bit of word to 0 or 1" so if you were to do word= 32*(Row)1+(column) 2/16
therefore: 2/16=0.125 word=32+0=32
and since "col%16"=colmodulo 16 aka the remainder of col/16 you'd have to set the 125th bit of the 32nd memory address to zero or one? that obviously doesn't make sense so what am i misunderstanding.
Let's say you want to make pixel with coordinates (40, 31) black. (IIRC 0 is white and 1 is black). First, we need to find which word in the video memory contains the corresponding pixel. The formula is SCREEN + 32*row + col/16, where SCREEN is the address of the first word in the video memory (16384). In our case row = 31 and col = 40. Note that the division here is an integer division, which seems to be one of the things that confused you.
So the RAM address for the word containing this pixel is 16384 + 32 * 31 + 40 / 16 = 16384 + 992 + 2 = 17378.
Next, you need to determine exactly which bit in this word corresponds to the pixel. For this we use col % 16 = 40 % 16 = 8. So the 9th bit (bits start from 0) is the one that you need to set to 1 to make it black.