The cassette routines will probably be broken by this too, though you might be able to "overclock" the tape recorder (or MP3 file) to match. :) On Nov 25, 2015 9:43 AM, "Stephen Adolph" <twospru...@gmail.com> wrote:
> Hi Georg, > Very interesting! I think there could be impact on sounds as well. > Tundra semiconductor made a processor capable of 10MHz also. I have not > yet played with that. > It could be possible to make an adapter that includes a /4 circuit to feed > correct clock to the UART, and also the 81C55. > This is an interesting idea, worth exploring. > Steve > > On Wed, Nov 25, 2015 at 9:33 AM, Georg Käter < > georg.kae...@gk-engineering-services.de> wrote: > >> Hello together, >> >> I did some try out on overclocking the 80C85 in my M100. I was quite >> successful using an oszilator >> with 7,3728MHz which gives a CPU clock 50% higher than the original one. >> My M100 run with this >> w/o any issues in running BASIC so far, gain in performance is visible >> and amazing. But there is one thing >> you might have an solution or even idea how to solve for. TELCOM and any >> program communicating via >> serial port are not working as PIO 81C55 gets the clock from CPU which is >> now 50% above the original >> value. >> Any comment from you is welcome >> >> Kind regards >> Georg Käter >> > >
