| From: | Gary Peake |
| Date: | 19 Oct 2000 at 00:02:01 |
| Subject: | Re: AMIOPEN: Coldfire |
On Wed, 18 Oct 2000 15:22:19 -0700, owner-open@amiga.com "Ray Heasman"
<rayh@digitalharmony.com> wrote:
>
>
>> -----Original Message-----
>> From: owner-open@amiga.com [mailto:owner-open@amiga.com]On Behalf Of
>> Matthew J Fletcher
>> Sent: Wednesday, October 18, 2000 2:27 PM
>> To: open@amiga.com
>> Subject: RE: AMIOPEN: Coldfire
>>
>>
>> > On Wed, 18 Oct 2000, Matthew J Fletcher wrote:
>> > > > Well.. a little explanation would have been very welcome, though :)
>> > >
>> > > Classic amiga code does not run on the coldfire, classic
>> amiga code will
>> > > not totaly run on the new amiga.
>>
>> > Hummm... just this and I will shut up :) I didn't say that the
>> old AmigaOS
>> > would run on the coldfire, I said that, probably, but probably
>> I am wrong,
>> > Ami, once it ran on the coldfire, would run also on the classic amiga
>> > (given you have the needed drivers, of course)
>>
>> you are right in that once you have created a coldfire translator
>> then you
>> are some of the way there to a 68k translator.
>>
>> You are also right in that there is no reason why the new amiga could not
>> run on old 68k classic hardware, i amagine that it would be
>> pretty damn slow
>> even on a 50mhz 060.
>
>Arg. Read what the guy said.
>
>His logic is:
>Ami runs on coldfire => Ami uses small subset of 68k opcodes.
>Small subset of 68k opcodes => code written for coldfire runs on 68k
>unaltered.
>Classic amiga uses 68K CPU => Classic amiga could run coldfire opcodes
>without barfing.
>
>Of course it still wouldnt work, because you need to support the
>architecture too, not just the CPU, but he said that as well.
>
>He is saying that if you have a coldfire translator then you are 100% of the
>way
>to a 68K translator, assuming that the coldfire ISA is only a subset of the
>68k.
>Sure you dont use all the opcodes, but the ones you do use work.
>
>I dont care wether he is right or wrong, as it's a hypothetical point, but
>it seems to me that you are continually misunderstanding him.
I did not misunderstand him and knew where he was heading. Nice idea that
will not work in actuality. We have been down that road.
Sincerely,
Catch the Dream ... The AMIGA Dream Team
Privileged and Confidential communication. If you are not the addressee,
you may not read, copy, or distribute this email. This email is not for
public use or knowledge. If you receive this email in error, please advise
us by return email. Thank you.