whereas r800 has 256 byte ram blocks whose page edges result in a refresh! pity the darn thing isnt z84 24mhz - mind you even zilog dont claim to have this speed so dont see how the russians can claimit or the dma when there arent any clocked at the speeds they claim and even for the 14mhz atm turbo 2+ pentagon they havnet uploaded any videos of 48/128 stuff actually able to use it....
did you try this in atom lite - its not sam screen mode yet but we are working on it... http://cid-1c842d5b23e1e0e2.skydrive.live.com/self.aspx/.Public/zx%20spectrum/zx^_girlsaloud^_something^_kinda^_ooh.zip http://www.ys3.org/?p=106 dunno what embed does... <iframe title ="Preview" scrolling="no" marginheight="0" marginwidth="0" frameborder="0" style="width:98px;height:115px;padding:0;background-color:#fcfcfc;" src="http://cid-1c842d5b23e1e0e2.skydrive.live.com/embedicon.aspx/.Public/zx%20spectrum/zx^_girlsaloud^_something^_kinda^_ooh.zip";></iframe> On 27 May 2010 14:49, Andrew Collier <and...@intensity.org.uk> wrote: > 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 <rogerjow...@gmail.com> 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 <and...@intensity.org.uk> wrote: >>> On 27 May 2010 10:46, Roger Jowett <rogerjow...@gmail.com> 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 >>> >> >
