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Author Topic: Adding Ram to A500  (Read 3419 times)

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Offline toca180Topic starter

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Adding Ram to A500
« on: September 20, 2005, 01:22:57 PM »
Hi

Ive got an A500 with A590 (2mb ram), mtec 68020i (with 4mb ram and fpu), Cortex 8 mb ram expandtion (only has 4mb fitted) and a Marpet MP502A 512k trapdoor expanstion. The cortex and A590 have auto configed fine but the other two haven't. How do I add the other two so I can use them? Please explain it as easily as possible. :-)

Thanks
Robert
A1200 (Dead :-(  OS 3.1/3.1, 030@33, 882@33, 2/8MB RAM, 1.4GB HDD
A500 OS 3.1/3.1, 020@14, 882@14, 0.5/6.5MB RAM, A590 2GB SCSI HDD, CD ROM, Mas Player
A600 OS 2.1/2.05, 000@7, 1/0MB RAM

Commodore
Vic 20 1530
64C 1541, 1530
128 1530
C16 1531
 

Offline toca180Topic starter

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Re: Adding Ram to A500
« Reply #1 on: September 20, 2005, 02:15:25 PM »
Thanks, for the fast reply.

If I close the auto config jumper on the mtec it on longer boots from the 590, I just get the 3.1 ks screen. If I load workbench from floppy the ram on the mtec is there and the ram from the 590, as there is 6mb of other, but the hard drive partitions are not there. I also get hard drive (2gb scsi) activity before the ks screen. :-?

With the only jumper on the Marpet open it will boot but with no extra ram

All this is without the cortex connected.

Thanks
Robert
A1200 (Dead :-(  OS 3.1/3.1, 030@33, 882@33, 2/8MB RAM, 1.4GB HDD
A500 OS 3.1/3.1, 020@14, 882@14, 0.5/6.5MB RAM, A590 2GB SCSI HDD, CD ROM, Mas Player
A600 OS 2.1/2.05, 000@7, 1/0MB RAM

Commodore
Vic 20 1530
64C 1541, 1530
128 1530
C16 1531
 

Offline toca180Topic starter

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Re: Adding Ram to A500
« Reply #2 on: September 20, 2005, 03:14:52 PM »
Unfortunatly I don't have the manual. I got it from ebay and it is just the board.  :-(

Is there anyway that I can manually add the ram, for both the mtec and marpet? If so will this still cause the same problems?

Thanks

Robert
A1200 (Dead :-(  OS 3.1/3.1, 030@33, 882@33, 2/8MB RAM, 1.4GB HDD
A500 OS 3.1/3.1, 020@14, 882@14, 0.5/6.5MB RAM, A590 2GB SCSI HDD, CD ROM, Mas Player
A600 OS 2.1/2.05, 000@7, 1/0MB RAM

Commodore
Vic 20 1530
64C 1541, 1530
128 1530
C16 1531
 

Offline toca180Topic starter

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Re: Adding Ram to A500
« Reply #3 on: September 20, 2005, 06:43:57 PM »
When I type that in I get:

scsi.device 40.5 (13/09/93)

I assume I have to add a line to my user-startup or Start-Sequence, which one? If I put AddMem into the C draw would this be the line I need to add:

AddMem START 40000 TO 7FFFFF [PRI value (what is it? What should I put?)] [NAME mtec (would this be ok?)]

I start as 400000 as show config tells me that the 590 is added at 200000 to 3FFFFF.

As for the Marpet, I think it might have just been a bad contact. As I just reseated the ram and it now works. (Guess I should ahve done that first.  me :destroy: )

Thanks
Robert
A1200 (Dead :-(  OS 3.1/3.1, 030@33, 882@33, 2/8MB RAM, 1.4GB HDD
A500 OS 3.1/3.1, 020@14, 882@14, 0.5/6.5MB RAM, A590 2GB SCSI HDD, CD ROM, Mas Player
A600 OS 2.1/2.05, 000@7, 1/0MB RAM

Commodore
Vic 20 1530
64C 1541, 1530
128 1530
C16 1531
 

Offline toca180Topic starter

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  • Join Date: May 2005
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Re: Adding Ram to A500
« Reply #4 on: September 20, 2005, 08:29:13 PM »
When I type into a cli "AddMem START 400000 TO 7FFFFF" it makes my amiga freeze and I have to reset it.

Why would this be? What am I doing wrong?

Thanks
Robert
A1200 (Dead :-(  OS 3.1/3.1, 030@33, 882@33, 2/8MB RAM, 1.4GB HDD
A500 OS 3.1/3.1, 020@14, 882@14, 0.5/6.5MB RAM, A590 2GB SCSI HDD, CD ROM, Mas Player
A600 OS 2.1/2.05, 000@7, 1/0MB RAM

Commodore
Vic 20 1530
64C 1541, 1530
128 1530
C16 1531