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NorthWay · 12 October 2016, 00:55

(A rotten memory and not enough search-fu withstanding

Is it documented the relation between bitplane memory fetch and how much later the pixels are shown on screen?

When testing in UAE it seems to me that in 8bpl 64-bit lores mode the first pixel will display 5 pixels offset from end of last fetch:
I simply made a long copperlist that ping-pongs between two colours and looked at how many pixels I could see between the delay the fetch imposed and where the bitplane pixels started showing.
I found a comment that copper writes happen later than expected - is that what I'm seeing?

(I'm trying to see if I can make a vertical split fit in between the fetches; reseting bplcon1 values plus pointer changes.)

--

Do bitplane modulos update all bitplane pointers or only those that are in use according to bplcon0?

12 October 2016, 00:55	#217
NorthWay Registered User Join Date: May 2013 Location: Grimstad / Norway Posts: 840	(A rotten memory and not enough search-fu withstanding Is it documented the relation between bitplane memory fetch and how much later the pixels are shown on screen? When testing in UAE it seems to me that in 8bpl 64-bit lores mode the first pixel will display 5 pixels offset from end of last fetch: I simply made a long copperlist that ping-pongs between two colours and looked at how many pixels I could see between the delay the fetch imposed and where the bitplane pixels started showing. I found a comment that copper writes happen later than expected - is that what I'm seeing? (I'm trying to see if I can make a vertical split fit in between the fetches; reseting bplcon1 values plus pointer changes.) -- Do bitplane modulos update all bitplane pointers or only those that are in use according to bplcon0?