Amiga.org

Amiga.org specific forums => New User Introductions => Topic started by: chriss on May 16, 2005, 08:45:21 AM

Title: A1500 + Bridgeboard problems
Post by: chriss on May 16, 2005, 08:45:21 AM

Hi,
   I've had an A1500 with 40M hardcard (Impact A2000-HC+8) for several years, still a good m/c for gaming. I've just bought an A2286 Bridgeboard, but found I have to reduce the RAM in the hardcard to 6M for the Bridgeboard to work: this sounds like a memory contention problem, is there any way to get around this? I don't have any documentation except user manuals for Workbench 1.3 and the Bridgeboard, I'd like to get hold of a technical manual for the A1500 (showing memory map, O.S. calls, etc.)- any suggestions? I'd also like to obtain an Assembler/'C' compiler for this machine: I'm an electronic engineer (now semi-retired) with a fair amount of programming experience.

Title: Re: A1500 + Bridgeboard problems
Post by: glitch on May 16, 2005, 11:53:21 AM

Hi,

     I'm pretty sure you can't get around the 6MB RAM limit with the Bridgeboard.  The A2286 maps it's memory locations to that area of Zorro II space.  You can however get a 68020 or higher accelerator board and it's 32Bit memory (usually Zorro III on the memory map) should not interefere with the Bridgeboard at all.  You then  might need to run the "Enforcer" program if I recall...

Good luck!

-G

Title: Re: A1500 + Bridgeboard problems
Post by: Michael_D on May 16, 2005, 11:53:51 AM

Hi,

no there isn't any way to get araound this.
The Bridgeboard needs some memory space from the Amiga side
for the emulation.
The Zorro-II-space is only 8MB. If your HC+8 holds the full
8MB there is no space left for the emulation.
Here is the memory map of the A3000:

(http://home.arcor.de/micky.d/pics/amiga/AmigaMem.jpg)

The right part schould match the A2000 memory.