[Coco] 6309 port of NitrOS-9 Level 1

[Tormod Volden]

On Sat, Jan 24, 2015 at 6:01 PM, Robert Gault <robert.gault at att.net> wrote:
> Tormod Volden wrote:
>>
>> On Sat, Jan 24, 2015 at 4:36 AM, Robert Gault wrote:
>>>
>>> Tormod Volden wrote:
>>
>> I don't know what's up with the sourceforge web interface, but you can
>> see my changes under "History":
>>
>> http://sourceforge.net/p/nitros9/code/ci/f4f1066c8096a49ff4b4b28c12589b16be8cb3e7/log/?path=
>>
>>
>> OK, then at least it should build and run without too much work.
>>
>>>
>>> As long as the existing 6309 code is not embedded within a Level2
>>
>>
>> This is probably a common problem. Didn't any of you already work on this?
>>
>
>>
>> Yes mostly, and in a new coco2_6309 tree. Again, use "History" to see
>> changes (until you update your local tree).
>>
>> Tormod
>>
>
>
> OK, I've been able to read the differences if not the actual files. Your
> changes for coco2->coco2_6309 and essentially the same things I tried with
> coco1 -> coco1_6309. I've built disks but they will not boot.

If there is interest for coco1_6309 I can add a tree for that as well.
BTW I don't know the difference between coco1 and coco2 for NitrOS-9
other than the slower speed of the serial port (for DriveWire).

>
> The only system I have for testing is the Debugger built into MESS. I'm
> running coco3_6309 and the boot gets to the NITROS9 BOOT screen and then
> crashes. The debugger indicates that the crash occurs in krn when trying to
> F$Link to Init.

You mean coco1_6309 I suppose? coco3_6309 works as it should, right?

>
> Now I've never tried to create a Level1 H6309 package. So whoever may have
> worked on that, it wasn't me. The level1 .asm files should work in a 6309
> package as long as there is no confusion with stacks.
> If all registers are pushed onto the stack, there won't be a problem if the
> appropriate stack in os9.d is used. Unfortunately, there is code that mixes
> statements like  lda 3,u  with lbd  R$Y,u and that ought to cause problems.
>

In the threads I linked to there were posts by you with inlined code
changes. Please send me a patch for these changes. It doesn't make
sense for me to try to manually detect which changes you made in those
e-mails and retyping them. I assume you are sitting on corrected
source files and can easily generate patches.

Best regards,
Tormod