Re: [hatari-devel] add support for TT ram ?

[Douglas Little <doug694@xxxxxxxxxxxxxx>]

A de-confused version of what I just said :)

- adding up to 16MB -> just Maddalt() at $01000000, or modify the TOS $4xx memory range.

- adding more than 16MB -> extra work, drivers

At least, as far as I remember!

D

On 11 December 2014 at 10:29, Douglas Little <doug694@xxxxxxxxxxxxxx> wrote:

When I did this driver for Afterburner 68040, I had to scan upper memory and catch bus errors etc. and then build a PMMU tree.

I think the MMU tree is optional though - at least 16mb is already mapped by TOS - and then it repeats every 16mb for a while by default.

If you want to map more than 16MB into the Falcon, I think you need to rebuild the PMMU tree. Extra 16MB is enough for now though to make it useful.

D

On 11 December 2014 at 10:08, Nicolas Pomarède <npomarede@xxxxxxxxxxxx> wrote:

Le 11/12/2014 11:04, laurent.sallafranque@xxxxxxx a écrit :

Just a question : how does it work on the real computer ?

I mean, the standard falcon can only have 14 megs.
if one wants more memory, he has to add a hardware card with the extra memory slot.
Is there a special driver (or a patched TOS) given with the card or is it the standard Falcon TOs that recognize automatically the extra RAM ?

Hi

yes, from what I saw, such extra boards with cpu and ram often have some extra drivers (I think it was the case wit the CT60 for example), maybe some program to patch TOS's variables after the boot to correctly declare the extra RAM.