linux-apus-devel

Amiga Memory map

[<fh...@at...>]

Was the Amiga memory map posted to this list?

I sent a message to Ralph asking about how the
53c770 chip accesses the Amigas memory and he
gave a rather short answer saying it can DMA to
all the Amigas memory using big endian '040 bus
protocol.  I'm sure that is a complete answer that
tells me all I need to know.   Does that mean the
chips sees the Amiga in a flat linear memory space.  i.e.
can see all chip/custom chip and fast ram and would
access it just like a 68040 chip.  i.e. the locations would
be the same numerically. Another i.e. if a custom chip
or memory location were at $DDXYWZ00 to the 68040
if would appear the same to the SCSI chip?

If anyone can point me to a message or FAQ that describes
the Amigas memory layout relative to the processor I 
would appreciate it.

Fred

Re: Amiga Memory map

[<gri...@ps...>]

> If anyone can point me to a message or FAQ that describes
> the Amigas memory layout relative to the processor I 
> would appreciate it.

Sorry 'bout the delay..

Finally dug up the A3000 schematics at home.

This is the list in the schematics document:

$000000	-	$1FFFFF		Up to 2Megs of CHIP mem
$200000 -	$9FFFFF		Auto-Config memory space (Z-II)
$A00000 -	$BFFFFF		IO Space (8520s)
$C00000 -	$D7FFFF		A500 'ranger' memory
$D80000 -	$D9FFFF		Custom chip register mirror or RTC
$DA0000 -	$DBFFFF		Unused
$DC0000 -	$DDFFFF		RTC
$DE0000 -	$DFFFFF		Custom Chip Registers
$E00000 -	$E7FFFF		Unused
$E80000 -	$E8FFFF		Autoconfig Slot
$E90000 -	$EFFFFF		64K Autoconfig slots
$F00000 -	$FFFFFF		ROM space

$01000000 -	$07FFFFFF	On-board 32 bit RAM. Grows DOWN from $07FFFFFF
$08000000 -	$0FFFFFFF	32 bit expansion. Grows UP from $08000000
$10000000 -	$EFFFFFFF	32 bit 'other' expansion space

								Bye, Arno.

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Re: Amiga Memory map

[Geert U. <ge...@li...>]

On Mon, 16 Oct 2000, Arno Griffioen wrote:
> Finally dug up the A3000 schematics at home.
> 
> This is the list in the schematics document:
> 
> $000000	-	$1FFFFF		Up to 2Megs of CHIP mem
> $200000 -	$9FFFFF		Auto-Config memory space (Z-II)
> $A00000 -	$BFFFFF		IO Space (8520s)
> $C00000 -	$D7FFFF		A500 'ranger' memory
> $D80000 -	$D9FFFF		Custom chip register mirror or RTC
> $DA0000 -	$DBFFFF		Unused
> $DC0000 -	$DDFFFF		RTC
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
A3000 builtin SCSI is here as well. As some other misc bits, IIRC.

> $DE0000 -	$DFFFFF		Custom Chip Registers

DFF000-DFFFFF

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@li...

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds

Re: Amiga Memory map

[<fh...@at...>]

In <200...@su...>, on 10/16/00 
   at 07:25 PM, gri...@ps... (Arno Griffioen) said:

Thanks for the memory map!


>Finally dug up the A3000 schematics at home.

>This is the list in the schematics document:

>$000000	-	$1FFFFF		Up to 2Megs of CHIP mem
>$200000 -	$9FFFFF		Auto-Config memory space (Z-II)
>$A00000 -	$BFFFFF		IO Space (8520s)
>$C00000 -	$D7FFFF		A500 'ranger' memory
>$D80000 -	$D9FFFF		Custom chip register mirror or RTC
>$DA0000 -	$DBFFFF		Unused
>$DC0000 -	$DDFFFF		RTC
>$DE0000 -	$DFFFFF		Custom Chip Registers
>$E00000 -	$E7FFFF		Unused
>$E80000 -	$E8FFFF		Autoconfig Slot
>$E90000 -	$EFFFFF		64K Autoconfig slots
>$F00000 -	$FFFFFF		ROM space

Hmmm.  This is where the CSPPC SCSI is located.  This seems to be in the
wrong spot?  Does the APUS kernel mark this memory as read only?

0xf40000

>$01000000 -	$07FFFFFF	On-board 32 bit RAM. Grows DOWN from $07FFFFFF
>$08000000 -	$0FFFFFFF	32 bit expansion. Grows UP from $08000000 $10000000
>-	$EFFFFFFF	32 bit 'other' expansion space

>								Bye, Arno.

Fred