Changes
CRTC
,/* Split screen */
Total height of all splits must be 39.
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== Fine horizontal hardware scroll ==
When R2 increases by 1, the screen is shifted to the left by 16 mode2 pixels.
When R2 decreases by 1, the screen is shifted to the right by 16 mode2 pixels.
When R3l increases by 1 (and if <6), the screen is shifted to the left by 8 mode2 pixels.
When R3l decreases by 1 (and if >2), the screen is shifted to the right by 8 mode2 pixels.
Beware, these effects rely on invalid video signals by shortening the C-HSYNC produced by the [[Gate Array]]. They are badly supported on modern displays.
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