Re: [stella] Clarity in a playfiled discription.

Subject: Re: [stella] Clarity in a playfiled discription.
From: Christopher Tumber <christophertumber@xxxxxxxxxx>
Date: Fri, 04 Apr 2003 11:18:00 -0500
>Is that stating that you can only draw half a screen (left) an have it either repeated or mirrored?? (ala pac-man..combat)

Normally, yes. There are only 1/2 half screen worth of Playfield registers. Depending upon the setting of CTRLPF the right side of the screen is either a copy of or mirror image of these registers. (This would be "basic playfield generation")

However, you CAN change these registers while the screen is being drawn. So you can wait until part of the left hand side of the screen is drawn and change the register(s) in time so that they're different when it's time for the right hand side to be drawn. Thus creating an asymetrical Playfield. (This would be "advanced playfield generation")


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