More hardware fun; a non working memory expansion

[Doppie1200]

Hi,

I obtained a Micronik 1210 Ram expansion.

Ofcourse it was DOA. The price was as such ;-)



This is my board. On top you can see a header. It seems as if they are intended for some jumpering as texts S0 to S3 are printed near it.

Does anyone have this card aswell and knows how the card should be jumpered?

Thanks in advance.

[Doppie1200]

What the designer has been up to with all these jumpers is beyond me for now. It is a Rev1.3 board I have. Could be other revisions had other jumpers.

Maybe it is the EDO simm that is unsupported. I can jumper all I want. I get no fastram

[Doppie1200]

Thanks Agnus!

your post got me thinking;

The clock jumper is the same as on the board you mention.
It should be on Int since there is no oscillator on the board.

The other jumpers did not make any sense to me.
However I managed to get an 8M EDO simm working using two jumpers on the header;

S0,S1,S2 and S3 are available pin pairs

Closing S0 and S3 gives me a black screen (missing FPU?)
Closing S1 and S3 gives me 4MB
Closing S2 and S3 gives me 8MB
Leaving S3 open makes the board not appear in the board diagnostics.

Well, that was fun trial and error. Should I mail this to the hardwarebook? Or does someone else have the manual that explains this more complete?

[Doppie1200]

You are welcome. And its Angus.  

Oops sorry must be dislectic.

So it is now working to your satisfaction?

Well the RTC battery is still missing. I will have to find out what the voltage is that is required. Otherwise it is good to have a spare 4 (or8) MB fastram card around.