I wonder, would grayscale look better if we updated the screen by rows instead of columns?

Not on the regular 83+ for sure, due to this.

hmm...I would be curious to see how that works as well. You would think it would look better because the lcd starts from the bottom left to right and continues the pattern of moving left to right.

Nice finds, I'll have to keep that in mind. Can't wait to try out the viewer!

thepenguin: can we have a program to calibrate to our LCD? Because the grey displays flashing patterns on mine. Otherwise, awesome.

Old grayscale games on ticalc.org had an intro screen asking you to choose an interrupt frequency speed. Some frequencies showed better quality but slower speed and others lower quality and higher speed. It depended of the calc, though. It was one of the very first 4 level gray routine, though, and not the most optimized stuff, since it was the first time.

No surprise there, you have a good lcd and it updates the screen faster. 65.8 fps actually. I don't know why I had you find those numbers that way, there is a much better way. (I had a long time to think while caddying today.)

I have to do a few things and I will have a nice program that tells you your screen type, and the fps you need. From that I can make a table of different lcd types so that my grayscale games will be boss. :)

One of those things I have to do is to calculate the frequency of the crystal timers on 40h because I don't think what's on wiki ti is correct.

Alright, here is the program that will tell me all I need to know. The more people that run this one, the better people will be able to make grayscale games in the future. You will also experience flickerless grayscale! with an occasional glitch line.

Just run gray4, press plus and minus to adjust the delay, and when you finally get the scrolling line to stop, (or come close), you will have the info that I need. So press second and tell me what you got.

And to avoid any secrecy, the Driver number is what I sent to port $29 to fix the lcd, (alcdfix), and Refresh is the value I am sending to port $32 with port $30 set to $40 (10922.667 hz). I am hoping that the different values sent to $29 will be enough to tell the different drivers apart so that the specific delay for each one can be used.

Oh, and wiki ti was perfectly correct.

Edit:
    I use 178 for mine. Doing a little bit of proportions, you should need about 163. Also, my delay is 44, yours is probably in the teens.