Re: [MiNT] default kernel build for aranym

[Paul Wratt <paul.wratt@gmail.com>]

(or MEM_PROT=NO according to MiNT)

of the 4 standard versions of aranym, only one uses mmu - so it has to
be disabled for the other 3 to boot
aranym
aranym-mmu
aranym-jit
aranym-jit-fpu
(jit does not work with mmu)

You have to know to turn off memory protection, and unless you have an
AFROS config you will not know that. The BootstrapArgs is empty by
default

the problem with its current setting is that unless you "restore mmu"
with "mmusetup.prg" (which is not supplied) you can not use memory
protection anyway

if you try to boot MiNT in ARAnyM with MiNT's current default
settings, this is what you get:
MMU is disabled
root_descriptors: 0
pointer_descriptors: 0
page_descriptors: 0
memory needed for each MMU tree: 0 byte
Couldn't initialize memory protection. Please run MINTNP.PRG instead.
FATAL ERROR. You must reboot the system.
Panic: Bus Error.
sr = 2704, pc = 000875ce, fw = 7008, ea = 00000000, ssw = 0000, fa = 00000000
Dregs: 00000001 00002304 0000fe06 00000000  00000000 00000000 00000000 00000000
Aregs: 00000004 000a7d36 000884cc 0004cc7a  0005e69e 0005e6d2 000c8990 000c8930
                                                                 usp = 000c8a0e

if you try and boot mint with "aranym-mmu" this is what you get:
MMU is disabled
root_descriptors: 0
pointer_descriptors: 0
page_descriptors: 0
memory needed for each MMU tree: 0 byte
Couldn't initialize memory protection. Please run MINTNP.PRG instead.
FATAL ERROR. You must reboot the system.
CPU: Double bus fault detected !
CPU: Halting

This means that grabing any ARAnyM and FreeMiNT daily build is
pointless at the moment, unless you already have a working setup.

I know that unpacking a daily build is not a simple thing, hence the
2x upgrade scripts I created last year, but I was still hearing
reports that "getting MiNT to run is not easy", and I think this is
the main cause, at least with ARAnyM. A simple change and a lot of
potential problems disappear, with MEM_PROT being properly documented
turning it on is not a problem.


Paul

On Wed, Apr 11, 2012 at 11:24 PM, Alan Hourihane <alanh@fairlite.co.uk> wrote:
> On 04/11/12 09:16, Paul Wratt wrote:
>> can either Alan or Helmut please change the default kernel arguments
>> for the ARAnyM build (mintara.prg)
>> MEM_PROT=0
>>
>> this will allow ARAnyM to boot MiNT without configs (for either) -
>> both fresh "out of the box"
>>
>
> Not without hearing from other ARAnyM folks first.
>
> Alan.