Re: Something else... 8501 GATE-IN

On 14/03/2018 17:39, Gerrit Heitsch wrote:

> You can't leave AEC high all the time even if you run the RAM at 
> double speed compared to now. The 8501 will not take its address lines 
> offline, so when TED does an access, you will have to take AEC LOW to 
> prevent bus drivers in CPU und TED fighting each other.
>
I was assuming you'd buffer them as part of the multiplexing and make 
them think they were the only things connected to the RAM.

If you keep the CPU and TED clocked together then they will both start 
their accesses at the same time, you'd then satisfy them both in the 
same time the original dram would satisfy one.