Derring 030 question?

[voyager]

Hi

I bought a derringer 030 for my cdtv, but the SIMM in the socket is only seen if I pull the SIMM up in its socket.

Cleaning it did not work.  So it can be the SIMM or the socket , I have no other 72pin test ram anymore, never thought I would used it in the future ;-)

My knowledge about 72 pin SIMM’s is a bit rusty . Do I need a 3,3v or a 5v SIMM? In my Derringer 030? Must it be single or can it be double sided?

I have found the correct AMP SIMM socket on the farnell side but they have a minimum order amount of 50 euro’s Then I found that amikit sells 72 pin sockets. My question is will the pin out fit? Amikit  only shows a small picture. Does anyone know’s if the pin footprint is more or less the same?

The Derringer runs at 25 MHz but a 50 MHz version also exists.  Can I upgrade the 25 MHz 68030 for a 50 MHz 68030?

Regards Sebastian,-  

[Plaz]

Pretty sure that used 5v simms. I'd have to tear apart my older system to see what I have, but that won't be possible any time soon.

Did you try resoldering the pins of the existing socket? It could be a case of old cracked solder.

Plaz

[rkauer]

 Could be a case of a "tired" spring on the SIMM socket. And SIMM sockets solder pins are always the same (standard). Just pick the ones you think best fits your needs (vertical, oblique or horizontal), just use those with metal clips (plastic clips are crap).

 Using a plier or a sharp small-screwdriver, try to pull a little the contacts.

 BTW: all Amiga accelerators uses 5V SIMM.

[LoadWB]

voyager wrote:

The Derringer runs at 25 MHz but a 50 MHz version also exists.  Can I upgrade the 25 MHz 68030 for a 50 MHz 68030?

Yes.  Jumpers on the board and the crystals will provide clues on how to do this.

[HyAmi]

Overclocking should be possible. However, the cards that left the factory as 50MHz cards, usually have other components which have tolerance for higher frequencies. (I've investigated this while I also have a 25MHz version). In the end, I didn't try it. I'd say YMMV and let us know if it works ok.

[LoadWB]

HyAmi wrote:
Overclocking should be possible. However, the cards that left the factory as 50MHz cards, usually have other components which have tolerance for higher frequencies. (I've investigated this while I also have a 25MHz version). In the end, I didn't try it. I'd say YMMV and let us know if it works ok.

Interesting.  My understanding is that 25MHz up to 50MHz boards are all the same except for crystals, jumpers, CPU, and FPU.

Yes, do give this a try and report your results.

[voyager]

I already lifted all the pins on the SIMM socket and also resolderd al the pin’s. I will order a SIMM socket from amikit and replace it.

About the upgrade, a 50 MHz 68030 is a little hard to come by, there is one on ebay, but I can’t afford one right now. I also am a disaster with ebay, here in the Netherlands we use marktplaats a lot mostly with fixt prices.

First the SIMM slot, then the Harddisk, cut the cover or lit so the accelerator will fit when its closed. I have a nice black air vent for it. But I will try the upgrade if I can find a cpu next month.

Thanks for now ;-)