SCREEN $80 is now 320x240 !

desertfish · Post by **desertfish** » Mon Mar 28, 2022 8:26 pm

A fantastic change was made today to the r39 kernal where the Vera memory layout has been changed, such that SCREEN mode $80 is now 320x240, instead of 320x200 with a black bar at the bottom!

How does this look like:

I only changed the vertical resolution and the zoom factor in this program to make it run full-screen on this new kernal. It uses the kernal's graphics routines to draw everything.

kelli217 · Post by **kelli217** » Fri Apr 01, 2022 5:39 am

A nice full-screen 256-color 320×240 Mandelbrot set. Done in BASIC without any optimizations, taking 10885.4833 seconds of emulated time. (181.4247216 minutes, or a bit over 3 hours.) Oh, and my old PC can only manage about 215% speed in warp mode, so it still took nearly an hour and a half of real time.

kelli217 · Post by **kelli217** » Fri Apr 01, 2022 4:48 pm

Actually, there's one optimization. It splits the image vertically and the bottom half is just a mirror of the top half, not independently calculated.

kelli217 · Post by **kelli217** » Mon Apr 04, 2022 1:53 am

Oh, and just by changing the zeroes in the BASIC source to points, I got it down to 10714.9333 seconds. It's under 3 hours of emulated time now, yay!