CSA Derringer 030 - tuned and broken??

[McTrinsic]

Hi all,

I recently have had the oscillator of my Derringer 030 replaced. I now have a 100 MHz oscillator instead of a 50 MHz. The 50 MHz generated the clock for a 25 MHZ bus, so now i (should) have a Derringer running at 50 MHz (i.e., the oscillator speed is halved on that board).

However, since doing so, my card does not find any RAM!

Running the D3 utility, all I get is a message saying

" ** SizeSimmSizeUp reports a bitmap of $00000
  ** SizeSimmSizeDn reports a bitmap of $00000
no DRAM found."

I already replaced the original 32MB SIMM with a 16MB SIMM from a 1230 IV, but the same message.

Any ideas?

Is my Derringer broken now??


Any help is appreciated!!

Have fun,
McTrinsic

[McTrinsic]

The CPU was replaced with a 68030 @ 50 MHz, so that isnt the issue (probably .

I can't simply put the original oscillator back in again, because I didnt have a socket and so had to solder it onto the board...


Any ideas anyone?


Have fun,
McTrinsic

[McTrinsic]

Well, it basically works.

And I still think it was worth a try . The Derringer is available as a "platinum" version, with a 100 MHz oscillator giving a 50 MHz board. So why NOT try??

I will try to replace the 100 MHz with a 66 MHz, getting me to (hopefully) 33 MHz.

Or does anyone have any other idea??

Anything I might / could do?

Have fun,
McTrinsic

[McTrinsic]

What might the MMU look like, btw???


McTrinsic

[McTrinsic]

Well, its a full 68030, i.e. it does include a MMU.

And it is not found by a SysInfo - program.

So unless anyone comes up with a better idea, I'll go and try with a 66MHz oscillator (= 33MHz board).

Have fun,
McTrinsic