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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Splurge on July 27, 2009, 07:34:37 PM

Title: Spectrum 28/24 problem in my 2000
Post by: Splurge on July 27, 2009, 07:34:37 PM

I recently got in a second hand 28/24 board and it doesnt look like my 2500 is liking it.  Early boot menu says the card is defective, but when I try it in my 3000 it works fine and the defective message isnt there.

Ideas?  I already tried the Zorro II force jumpers.

Title: Re: Spectrum 28/24 problem in my 2000
Post by: tone007 on July 27, 2009, 07:42:02 PM

Hm. How much 16 bit RAM does the 2500 have?  I had a 2000 and a Spectrum 28/24 worked fine in it, but all my RAM was on the accelerator.  Dunno if that makes a difference.

Title: Re: Spectrum 28/24 problem in my 2000
Post by: Splurge on July 27, 2009, 07:49:48 PM

I have 4 on the 2630 card and another 4 on a Supra card.

edit:

Its the damn Supra Card causing problems...  I took it out and "defective" disappeared.  Think I'm out of luck trying to use both at the same time?

Title: Re: Spectrum 28/24 problem in my 2000
Post by: tone007 on July 27, 2009, 07:51:23 PM

I'd try getting down to 6mb or less total to see if that makes a difference.

Title: Re: Spectrum 28/24 problem in my 2000
Post by: tone007 on July 27, 2009, 07:55:38 PM

Might just be too much memory in use on the Zorro II bus.  See if you can set the Supra card to 2MB.

Title: Re: Spectrum 28/24 problem in my 2000
Post by: zipper on July 27, 2009, 07:58:15 PM

Remember total max is 8 MB on ZorroII - including the RTG memory!

Title: Re: Spectrum 28/24 problem in my 2000
Post by: Splurge on July 27, 2009, 08:04:20 PM

Thanks guys, huge DUH moment for me there.  I completely forgot about the RTG using adding to that 8megs too.

Problem solved!

Title: Re: Spectrum 28/24 problem in my 2000
Post by: save2600 on July 27, 2009, 09:09:36 PM

Don't you hate it when you have "too much" ram?  lol

Title: Re: Spectrum 28/24 problem in my 2000
Post by: Splurge on July 28, 2009, 11:28:19 PM

Quote from: save2600;517049

Don't you hate it when you have "too much" ram?  lol

hahaha no joke.

My last question on this.  The pass through cable is a DB15 to the Spectrum's db9.  I assume I need to rig my own Amiga DB23 video cable to the DB9 on the spectrum, right?  When I do this, does the Spectrum convert that signal to where my non-multisync VGA monitor can view the image?

Title: Re: Spectrum 28/24 problem in my 2000
Post by: tone007 on July 28, 2009, 11:36:28 PM

No, the Spectrum doesn't scandouble.  It'll pass through the Amiga signal as-is.

One of those DB9 to DB15 cables could work for you with a standard Amiga 23 to 15 adapter if you have the stuff lying around, otherwise you would have to figure one out.  Of course, if you don't have a compatible monitor, it's probably not worth the trouble.

Title: Re: Spectrum 28/24 problem in my 2000
Post by: Splurge on July 28, 2009, 11:54:04 PM

Quote from: tone007;517231

No, the Spectrum doesn't scandouble.  It'll pass through the Amiga signal as-is.

Thanks

That's what I thought, just wanted to make sure before I bother with rigging a cable or not.