Re: FPGATED

Hi,

beware about the GODIL, I have some, but I lost a lot of time with 
defective GODIL sold by trenz-electronic...
replaced several month later by oho-electronic but I lost a lot of time....

the GODIL is quite big if you place one inside a plus4 or C116 it 
becomes impossible to close it...
I was trying to replace a 6530 for KIM1 (project abandoned all my time lost)


you can also try:
https://www.enterpoint.co.uk/products/obsolete-component-replacement/craignell-1/
or
https://www.enterpoint.co.uk/products/obsolete-component-replacement/craignell-2/

but beware for the craignell the GND and VCC pin are not remappable you 
have to specify the position
when you order.

I'm often using a craignell-1 28 pin as eprom when I'm developping
(quickly reprogrammed via jtag, without the need to remove the chip / 
erase / reprogram/ reinstall)

I had several problems....
-  problems with the level shifters
-  problems of delay
-  problems with glitches to filter

On 16/07/23 11:27 PM, Hegedűs István wrote:
> Hi,
>
> I believe that should be much easier. It can be done in a GODIL (I 
> just don't have one but I will buy).
> My FPGATED has the 8501 shell written around fpga64's 6502 core. It is 
> a good starting point however I have to think how to implement hold 
> times when the FPGA runs on phi0 instead of the higher 28MHz (4*dor 
> clock) internal clock.
> Othe roption is to synchronize the FPGA clock to phi0. Probably that 
> is the way to go. I will work on it later.
>
> Istvan
>
>
> -----Original Message----- From: Gerrit Heitsch
> Sent: Friday, July 22, 2016 4:45 PM
> To: cbm-hackers@musoftware.de
> Subject: Re: FPGATED
>
> On 07/22/2016 02:16 AM, Steve Gray wrote:
>> Very nice! I'm looking forward to a drop-in replacement. I have a few
>> Plus/4's that could use a new TED.
>
> Next project would be a replacement 8501 since those also die easily...
>
>  Gerrit
>
>
>
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>
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