Ram conflict

[hamtronix]

So here is my question:

I just got my slot accelerator (A2630) with 4 MB RAM. I plugged it in and it worked bing-bang-boom.

I also have a GVP SCSI controller with 8 MB RAM on it. That I have my HD and CD on.

Now it appears the A2630 takes over the RAM and I can only see the 4 MB on its board and the RAM on the GVP shows up as defective in the Board Diagnostics screen. It isnt defective as I pulled the card out again and it showed up fine.

I figure I may have to yank 4 MB from the GVP SCSI board and go back to 8 MB instead of the desired 12 MB.

Is there a way to access all of the RAM or is it a hardware limit that cannot be surmounted?

I also will be installing the Megachip in the system later on today!

[rkauer]

hamtronix wrote:
Now it appears the A2630 takes over the RAM and I can only see the 4 MB on its board and the RAM on the GVP shows up as defective in the Board Diagnostics screen. It isnt defective as I pulled the card out again and it showed up fine.
Is there a way to access all of the RAM or is it a hardware limit that cannot be surmounted?

I also will be installing the Megachip in the system later on today!

 The Zorro busboard have a limit of 8 Mb in the autoconfig space. So you can't add more than 8Mb zorro-RAM! You problably can´t add more 6~7 Mb this way (remember other cards use the zorro memory space, too).

 If I was you, I'll keep the accelerator and put the RAM-board in a safe place for an incertain future backup (or sell it!).

 The Megachip is a good piece of h/w, btw. Go for it.

[Zac67]

Just set your GVP to '4 MB RAM only' and you're set. There's no way to configure >8 MB RAM in Zorro II space.

@rkauer
I/O boards usually allocate only 64 KB which is taken from a different location and doesn't interfere with the 8 MB memory space - as long as you have no more than 32 I/O boards attached... ;-)

[hamtronix]

Zac67 wrote:
Just set your GVP to '4 MB RAM only' and you're set. There's no way to configure >8 MB RAM in Zorro II space.

@rkauer
I/O boards usually allocate only 64 KB which is taken from a different location and doesn't interfere with the 8 MB memory space - as long as you have no more than 32 I/O boards attached... ;-)

Yep this is what I did and it showed up. I am about to put in the megachip! Woo hoo. Thanks to the members of this site I may have an SGI trade worthy Amiga 2000

Oh, I also found out my A25000 RAM 2MB board works the 8MB RAm on my GVP scsi board just took over... so its too bad someone didnt snap it up when I asked if anyone wanted earlier...