On Sunday 21 October 2012, you wrote: > On Sun, 21 Oct 2012 15:22:12 +0200 > > "Marc 'BlackJack' Rintsch" <marc@rintsch.de> wrote: > > Hi *, > > > > Any thoughts about providing `slow()` and `fast()` functions for the > > C64 target that switch the screen on/off and would set a C128 into 1 > > Mhz/2 Mhz mode? > > > > It is common to do this in computing intensive programs like > > compression software. C128 users get some extra speed out of the C64 > > application and on the C64 it doesn't do any harm AFAIK. Even there > > you get a small speed gain because the VIC doesn't stall the CPU any > > more for memory access. > > > > Ciao, > > > > Marc 'BlackJack' Rintsch > > Would be nice for Atari target as well. Display-DMA off increase speed > from 1.2 MHz to 1.8MHz. > To be precise, display-DMA steals cycles from 6502 that it effictivle > runs at 1.2MHz instead of 1.8MHz :) very similar to the "badlines" of a VIC-II i guess :) -- http://www.hitmen-console.org http://magicdisk.untergrund.net http://www.pokefinder.org http://ftp.pokefinder.org Ich ahne, wovon ich spreche, meine Damen und Herren. <Angela Merkel, CDU> ---------------------------------------------------------------------- To unsubscribe from the list send mail to majordomo@musoftware.de with the string "unsubscribe cc65" in the body(!) of the mail.Received on Sun Oct 21 15:49:46 2012
This archive was generated by hypermail 2.1.8 : 2012-10-21 15:49:49 CEST