2x; very much noticeable. I'll have to do a video or something. The screen io is 2x faster. It is fed through the PIO chip which is running in step with the cpu.
In order to keep the serial port running at expected rates, the timer portion of the PIO needs a 2.5 MHz clock though. To keep software compatibility, it makes sense to keep the serial port running at the correct rate. Last comment: in my speed tests last year I found I could speed things up quite a bit faster than 5 MHz..maybe 8MHz, until the screen finally halts the machine. So the LCD is the ultimate bottleneck. 5 seems comfortable. On Wed, Nov 17, 2021 at 9:17 PM John R. Hogerhuis <[email protected]> wrote: > Congrats that's a really cool mod. > > How does the screen scrolling seem with this mod? Faster? > > -- John. >
