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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: guest1255 on June 10, 2004, 09:24:22 PM

Title: How many memory cards onboard?
Post by: guest1255 on June 10, 2004, 09:24:22 PM

Hello,
How many memory cards can be located on an Amiga 2000 rev6 board?
TIA
Apache2k

Title: Re: How many memory cards onboard?
Post by: Acill on June 10, 2004, 09:30:10 PM

As many as you want, but the address soace for RAM limits it to 16MB total unless you have it on an accelerator i the CPU slot.

Title: Re: How many memory cards onboard?
Post by: Kronos on June 10, 2004, 09:36:30 PM

@Acill

Yeah, the 68000 has an address-space of 16MB, but that allready includes ROM, Chip-Mem, Ranger-Mem, Chipset, IO .....

8MB is the maximum you can put into the Zorro-slots.

Title: Re: How many memory cards onboard?
Post by: Lemmink on June 10, 2004, 09:38:10 PM

Correction: ZII adressspace is 8MB total, not 16 MB. And all ZII Memmorycards I know of place their RAM in this adressspace.

Title: Re: How many memory cards onboard?
Post by: guest1255 on June 10, 2004, 10:01:47 PM

I see, so if i have 2mb someting old on it and put another card 4 mb, it should work fine? Only thing i know is that they fit to and Amiga 2000..
I have uset A500 in the beginning of 1990 for maybe 3 years so.. i dont remember much...
just some other question:
is there a hard disk limit? I have two hard disks, can i use them both
and can rom 1.3 run a workbench 2?
i promise to search some instructions, just wanted to know these..

thank you very much..
Apache2k

Title: Re: How many memory cards onboard?
Post by: JimS on June 10, 2004, 10:55:06 PM

Also be aware that some other cards use up part of that space. The Bridgeboards use space for shared memory. A meg, I think. If you've got one of those in the 2000, you need to leave space for it.

Title: Re: How many memory cards onboard?
Post by: Acill on June 10, 2004, 11:07:30 PM

Thanks for the corrections guys. I thought for the longest time you
could put 16MB on the boards. I've had an accelerator in my A3000
since they came out, and never used anything other then an A1000 prior
 to that with only 2MB before I upgraded it to the Phoenix.. So I
guessed it followed what I read about the 68000 specs.

Title: Re: How many memory cards onboard?
Post by: Thomas on June 11, 2004, 09:56:40 AM

Quote

Apache2k wrote:
I see, so if i have 2mb someting old on it and put another card 4 mb, it should work fine?

Note that gfx, sound and i/o cards may carry some memory either. All together has to fit into the 8MB range.

Quote

is there a hard disk limit? I have two hard disks, can i use them both

First of all the A2000 does not have a harddisk controller. Sou you first have to get a controller. Size limits depend on the controller. Most common limits are 2GB (upper limit for signed 32bit numbers) or 4GB (unsigned 32bit numbers). Some controllers have problems even with more than 500 MB or so. These limits usually can be eliminated by updated software.

Quote

and can rom 1.3 run a workbench 2?

No. You can run any wb version up to the kickstart version, so 1.3 is your upper limit. Get 3.1 ROMs and you can run anything that is out there.

Bye,
Thomas

Title: Re: How many memory cards onboard?
Post by: Kronos on June 11, 2004, 10:05:27 AM

Quote

Thomas wrote:

Note that gfx, sound and i/o cards may carry some memory either. All together has to fit into the 8MB range.

Thomas

[nitpick]

Sound and IO-cards won't go into the 8MB, but into the Z2-IO-space, where they can allocate chunks of 64K max.

[super-nitpick]
Same goes for a Picasso2 in segmented mode
[/super-nitpick]

Bridgeboards need 128k and will therefore take some space out of the 8MB. Problem is that all allocations under 2MB still use up a full 2MB-block.

So adding 5 cards with 512K each would only result in 4MB useable RAM.

[nitpick]