Re: 6502, 6510 tri-state

From: groepaz_at_gmx.net
Date: Fri, 30 Nov 2018 16:10:58 +0100
Message-ID: <13208237.Bp8WniSLpM@rakete>
Am Freitag, 30. November 2018, 15:47:56 CET schrieb Pasi 'A1bert' Ojala:
> On 30.11.2018 16:11, silverdr@wfmh.org.pl wrote:
> > Does this happen all the time, regardless of whether the VIC is "blanked"
> > (bit 4 of SCROLY if memory serves)?
> IIRC VIC always uses the second half of the cycles. Sprites are fetched
> even when the screen is blanked and steal cycles. And naturally the
> refresh cycles need to be done, but they don't steal cycles. (See BA.)

"screen is blanked" and "sprites are visible" are even independent things, ie 
you can blank the screen (VIC generates no badlines) but still display 
sprites.

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<Baracuda/Smash Designs>
Received on 2018-11-30 17:00:03

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