[Coco] noswiz doesn't work for me...

[Brett Gordon]

Yeah... I didn't know the floppy decodes into the ff50-ff59 range
too... This is the source of Christopher Hawk's problem with xroar
too.

I don't think there should be a formatting problem between the
Glenside and SuperIDE, as long as they both use LBA mode. CCB only
supports LBA mode (there's actually a reason for that...)

In a nut shell:
  - CoCoBoot does a "read sector 0" from IDE, which stores a 0xe0 to ff55.
  - if a FDC is in the map, then ff55 is a mirror of ff40.. the FDC control reg.
  - a value of 0xE0 turns on the FDC's HALT,SIDE, and NMI bits.

I'll have to change CCB not to blindly try to use the IDE on boot, to
be nice to the possibility of a FDC being there instead!

I guess this is a good reason to use ff70 for the IDE's address, but
I'm sure that conflicts with other things then....

I'll work on a "nicer" IDE detection algorithm which should go hand in
hand with different base address support.

Thanks for trying CCB out guys!  With out these "is doesn't work"
reports, I'd never be able to improve/debug things!

Sincerely,

Brett Gordon





On 2/14/12, Willard Goosey <goosey at virgo.sdc.org> wrote:
> On Mon, Feb 13, 2012 at 09:16:18PM -0500, Brett Gordon wrote:
>> hmmm... it seems the two issues are:
>>
>> 1. CCB is not finding your IDE drive.
>> 2. CCB is not finding DW (without HDB translation)
>>
>> Issue 1: I was under the impression that there's no effective
>> difference between SuperIDE and the Glenside controller, at least from
>> a programmer's standpoint.  CCB only works (for now) with a standard
>> IDE base address of 0xff50.  Others are not supported at this time
>> (it's planned for future CCB's,btw...)  Maybe your base address is set
>> different?  Does your IDE light flash or "blip" at all when cocoboot
>> goes to try it?
>
> 0xFF50 is floppy drive turf!  Due to sloppy decoding in all Tandy
> floppy controllers, the floppy controller decodes from FF40-FF5F.  My
> IDE controller is at FF70.
>
> The IDE hardware is, AFAIK, functionally the same.  However there
> might be differences in how the 2 drivers create a filesystem.  I
> don't know the technical details about what SuperDriver does.
>
>> Issue 2: I have tried using HDB-DOS/DW to boot CoCoBoot's boot.dsk the
>> following ways:
>
> That might be an issue because I have a slightly outdated server.
> We'll get back to that after I upgrade.
>
> Willard
> --
> Willard Goosey  goosey at sdc.org
> Socorro, New Mexico, USA
> I search my heart and find Cimmeria, land of Darkness and the Night.
>   -- R.E. Howard
>


-- 
Brett M. Gordon,
beretta42 at gmail.com