Re: 6510 RDY and RESET

From: Uffe Jakobsen <uffe_at_uffe.org>
Date: Wed, 04 May 2022 17:01:33 +0200
Message-ID: <cone.1651676493.3266.11180.1001_at_mailhost.starion.dk>
Michal Pleban writes:

> silverdr_at_srebrnysen.com wrote on 04.05.2022 15:55:
>
>> Modern FPGAs with built-in flash and Co. are narrowing the initialisation  
>> time gap on CPLDs significantly. Unless yours is known to be really slow on  
>> this, in the C64 context you may be able have a safe margin before the power- 
>> up cycle releases /RESET line[*]. I take this is important only on power-up  
>> as during warm RESET your FPGA is already loaded anyway.
>
> I am not sure at the moment if it's going to be a FPGA at all. I may end up  
> using a Propeller which is easier to program and cheaper, but unfortunately  
> it has around 1.5s startup time.
>

How about extending /RESET until your device is ready ?

/Uffe
Received on 2022-05-04 18:00:02

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