DKB 2632 crash

[Michele31415]

Hmm - while playing around with trying to get my GVP Spectrum board to work.  I thought that maybe that it was running out of space.  But as soon as I gave the "2632" command to activate the 112 meg. on my DKB 2632 board, the machine locked up - no reponse to keyboard or mouse.

When I pulled out the Spectrum board and rebooted, the 2632 command worked fine.  So is there something about these two boards that don't play nice together?  Does anyone have a configuration with a GVP Spectrum 28/24 on a 2000 and a DKB 2632 ram expansion that actually works?  :confused:

[Michele31415]

Someone?  I'm still stuck trying to figure out why my DKB 2632 locks up the machine when the Spectrum board is installed (without even installing any of the Spectrum software).  I'm not even sure where to begin looking for a cause.  Help!

[glitch]

Can you put the output of "ShowConfig" into a reply here so we can see the memory address space that the 2632 is using.  As well, what Kickstart do you have?

[Michele31415]

Sure - thanks for the reply.  ShowConfig gives me:

PROCESSOR:    CPU 68030/68882fpu/68030mmu
CUSTOM CHIPS:    ECS NTSC Agnus (id=$0030), ECS Denise (id=$00FC)
VERS:    Kickstart version 40.63, Exec version 40.10, Disk version 45.1
RAM:    Node type $A, Attributes $5 (FAST), at $1000000-$7FFFFFF (112.0 meg)
    Node type $A, Attributes $605 (FAST), at $200000-$5FFFFF (4.0 meg)
    Node type $A, Attributes $703 (CHIP), at $400-$1FFFFF (~2.0 meg)
BOARDS:
 CBM A2630 68030/RAM card:   Prod=514/81($202/$51) (@$200000 4meg Mem)
 CBM A590/A2091 HD controller:   Prod=514/3($202/$3) (@$E90000 64K)
 Board (unidentified):   Prod=4626/23($1212/$17) (@$EA0000 64K)
 Board (unidentified):   Prod=3643/18($E3B/$12) (@$EB0000 64K)
 Board + ROM (HD?) (unidentified):   Prod=3643/19($E3B/$13) (@$EC0000 64K)


This is with the Spectrum board not in the system.

[cha05e90]

You may try the MMULib package (see Aminet) as an alternative to the 2632 command.

[glitch]

Okay, and if can ge the output again without the 2632 and the Spectrum board installed.  I just wanted to see the default memory spaces each board were attempting to use.

I have not tried the solution offered by cha05e90, but try that too!

[Michele31415]

"without the 2632 and the Spectrum board installed."

Do you mean with neither board installed or "with the 2632 not installed but the Spectrum is installed"?

I think I'll try MMUlib first since it's kind of a pain to pull the 2632 off the back of the 2630.  Thanks for the suggestion - at least now I have something to try.

[Robert17]

Sounds like you're trying to exceed your Zorro II Memory Address space, maybe you could remove all cards and try with just the 2630, 2632 and Spectrum?

Robert.

[TjLaZer]

You cannot have more than 8MB 24-bit RAM, so the 2630 has 4MB (yes it uses the 24-bit address space!), the GVP Spectrum probably has 4MB and the 2091 has some RAM on it too?

[Michele31415]

OK, here is a ShowConfig with the Spectrum board back in the system.

PROCESSOR:    CPU 68030/68882fpu/68030mmu
CUSTOM CHIPS:    ECS NTSC Agnus (id=$0030), ECS Denise (id=$00FC)
VERS:    Kickstart version 40.63, Exec version 40.10, Disk version 45.1
RAM:    Node type $A, Attributes $605 (FAST), at $200000-$5FFFFF (4.0 meg)
    Node type $A, Attributes $703 (CHIP), at $400-$1FFFFF (~2.0 meg)
BOARDS:
 CBM A2630 68030/RAM card:   Prod=514/81($202/$51) (@$200000 4meg Mem)
 CBM A590/A2091 HD controller:   Prod=514/3($202/$3) (@$E90000 64K)
 Board (unidentified):   Prod=4626/23($1212/$17) (@$EA0000 64K)
 Board (unidentified):   Prod=3643/18($E3B/$12) (@$EB0000 64K)
 Board + ROM (HD?) (unidentified):   Prod=3643/19($E3B/$13) (@$EC0000 64K)
 Board (Viona Development):   Prod=2193/1($891/$1) (@$600000 2meg)
 Board + ROM (HD?) (Viona Development):   Prod=2193/2($891/$2) (@$ED0000 64K)

The Spectrum board is the last two lines labeled "Viona Development".  The other boards in the system are an Xsurf3CC network card and a Deneb USB.  So if I'm adding correctly, we've got 4 meg + 64K + 64K + 64K + 2 meg + 64K, which is less than 8 meg.

Am I reading that right?  I'd hate to have to pull either the Deneb or Xsurf just to be able to run the Spectrum.

[Matt_H]

I think there's something else going on. I have a 2632 as well and it is VERY unstable as soon as I add the memory to the system with the 2632 command, often resulting in the symptom you describe.

We had another thread on here a while back where someone reported an old fix from Dave Haynie for a possibly-related DMA problem that involved adding a resistor between pins on the CPU slot. Or was it the 68000 socket? Either way, the details were too vague for me to attempt it. Anyone know more about this?

[Ami_GFX]

I have the same combination of GVP spectrum and A2632 in my A2500 with no problems at all. The 2632 has been extremely stable for me. As I remember, for certain configurations, the 2632 command has to be in the right place in the startup-sequence. I can take a look at where I've put the command in my startup file. I think there should be intructions about this in a file on the 2632 disk.

[Michele31415]

Thanks - it's useful to know that there's at least some configuration in which those two boards will work together.

The DKB documentation suggests putting the 2632 command as close to the top of the startup-sequence as possible but I never got around to that.  I've always just been typing it into a shell once the WB is loaded.  I suppose I can try that.  If that doesn't work, I'll try the MMU util.

[Ami_GFX]

Thanks - it's useful to know that there's at least some configuration in which those two boards will work together.

The DKB documentation suggests putting the 2632 command as close to the top of the startup-sequence as possible but I never got around to that.  I've always just been typing it into a shell once the WB is loaded.  I suppose I can try that.  If that doesn't work, I'll try the MMU util.

That should be the way to go. The 2632 driver needs to be loaded before the monitor file for the spectrum, as I remember, for it to work.

[SpeedGeek]

The DKB2632 memory is extended memory which configures above 24 bit address space so the 8MB 24 bit/Zorro2 limit is NOT affected by this board! The most likely problem is a voltage drop on the +5 rail when both boards are installed.

Unfortunately, both the DKB2632 and A2630 have some design bugs which make them voltage and heat intolerant (as well as an overclocking nightmare).

... and since, I don't like repeating myself:

http://www.amibay.com/showthread.php?t=33672