Hi Roger, No, the other way round.
Accessing rom or external ram runs with no delays, whatever the screen state. In the border in modes 2,3,4, or with the screen off, cpu accesses to internal memory are rounded to intervals of 4 t-states In the raster with the screen on, or in Mode 1 during some of the border, cpu accesses to internal memory are rounded to intervals of 8 t-states Andrew On 27 May 2010 13:10, Roger Jowett <[email protected]> wrote: > oh so only when screen off is there no delay there is still some for > rom external ram but much more for iternal ram and most in mode 1 > > On 27 May 2010 10:51, Andrew Collier <[email protected]> wrote: >> On 27 May 2010 10:46, Roger Jowett <[email protected]> wrote: >>> and when the screen is off its like rom or external ram? >> >> No, it's like time spent when the raster is in the border area; i.e. >> rounding to 4 t-states still occurs, but not the doubling to 8 >> t-states. >> >> Andrew >> >
