== Advanced testing ==
* Only horizontal timing of the CRTC is affected.In order to get a stable image , you need to program register 0 at 95 (96 characters line) and Register 2 at 61 (centering for 40 characters default)* Pixels pitch is 66,.7% of their original pitch.Theses pictures show this fact (320*200 320×200 mode 1 pixels with black border)
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Image:12062011055.JPG|Original CPC @16Mhz
* This speed improvement is 16.66667%.This has been tested with this simple program :
10 i = 0 20 after 500 goto 100 25 cls 30 i = i +1 40 ? i 50 goto 30 100 end
20 after 500 goto 100 25 cls 30 i = i +1 40 ? i 50 goto 30 100 end Score is 258 on normal CPC versus 301 on 24Mhz 24 MHz CPC.
(Theses results can be subject to discussion as we are not sure interrupts timing is not affected)