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Author Topic: Enter the DRAGON  (Read 4551 times)

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Offline PulsatingQuasar

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Re: Enter the DRAGON
« Reply #29 from previous page: December 19, 2004, 04:04:32 PM »
I'm beginning to speculate here but this 32 KB on-chip system SRAM could be used for software to add the missing 68K instructions. I don't know if it's possible but it would in theory be a nice place to do that.

I saw several places in the manual where they talked about the differences between the 68K and the Coldfire and how to do things alternatively when porting source to the coldfire.

Maybe the developer kit from Freescale had allready source to implement all the missing functions of the 68K as a service to industrial companies looking for a quick fix to replace their old 68K stuff. I mean, the 68K might still be in use in the industry.

For an anounced date of january this hardware must actually be already finished. It's real release data would then be dependent on the delivery in quantaties of that coldfire.

Keeping an eye out for this hardware.
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Offline PulsatingQuasar

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Re: Enter the DRAGON
« Reply #30 on: December 19, 2004, 07:22:34 PM »
Hmmm....read somewhat more through the documentation.

10.2.3.6 Supervisor/User Stack Pointers
To isolate supervisor and user modes, CF4e implements two A7 register stack pointers, one
for supervisor mode and one for user mode. Two former M680x0 privileged instructions to
load and store the user stack pointer are restored in the instruction set architecture.

and

The FPU programming model is like that in the
MC68060 microprocessor. {but is 64-bit instead of 80-bit. I don't know what that means when you want to run MC68K code}
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Offline DaNi

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Re: Enter the DRAGON
« Reply #31 on: December 19, 2004, 11:58:40 PM »
any know if is compatible with the blizzards ppcs? for execute the ppc soft under workbench 3.9 with the 68k disabled and running the coldfire on os 3.9? example: load the os 3.9 with the dragon and play quakewarpos on a window using my 603.

cheers =)
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Offline Sparky

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Re: Enter the DRAGON
« Reply #32 on: December 20, 2004, 02:16:25 AM »
Elbox don't have the greatest track history of delivering the goods do they ?

Wonder why they still advertise the SharkPPC on their site ?  It's been what 3 years now ?
 

Offline PulsatingQuasar

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Re: Enter the DRAGON
« Reply #33 on: December 20, 2004, 08:12:21 AM »
@DaNi

Well, with the BlizzardPPC you loose a lot of time with context switching. So depending on how much CPU time is lost with adding the missing bits to the Coldfire I won't be suprised if it runs the 68K version of Quake 2 faster.
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Offline redrumloa

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Re: Enter the DRAGON
« Reply #34 on: December 20, 2004, 11:26:01 AM »
Quote
Wonder why they still advertise the SharkPPC on their site ? It's been what 3 years now ?


It's been > 5 years.
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Offline djbase

Re: Enter the DRAGON
« Reply #35 on: December 20, 2004, 06:49:01 PM »
There is already a mailing list if someone wants to join: http://groups.yahoo.com/group/dragon-coldfire/
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Offline mboehmer_e3b

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Re: Enter the DRAGON
« Reply #36 on: March 01, 2005, 02:32:22 PM »
Well.... we have March now. Just wondering if anybody has already seen anything of the Dragon yet (and I mean the body of it, or at least its tail, not the hot warm vapour coming from its mouth :-D ?