and when the screen is off its like rom or external ram?

On 27 May 2010 10:35, Andrew Collier <[email protected]> wrote:
> On 27 May 2010 09:41, Roger Jowett <[email protected]> wrote:
>> is the ram contention slower for mode two thatn mode 1?
>
> Mode 1 is slowest (deliberately so; this mode was only intended for
> Spectrum compatibility, so the ASIC attempts to slow the Z80 down a
> bit until it is approximately the same speed as in the Spectrum).
> Modes 2, 3 and 4 all have the same contention unless the screen is
> turned off.
>
> Andrew
>

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