ADC notes

#18 -- LDA a value or rely on current?
00 ?? A9 xx - depends on what you

#17 -- ADC
00 69
00 6D
00 79
00 7D

#16 -- STA stuff

   00 99 4C 00    <- EZ (if Y remains the same)
or 00 8D 18 01
or 00 9D 18 01
or 00 8F 18 01 - #15 needs to be 6B for subpixels if doing this
or 00 9F 18 01 - #15 needs to be 6B for subpixels if doing this

#15 -- normal RTL