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Re: Stupid idea for acceleration card and AROS

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2007/3/13 15:52
From West Midlands, UK
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You have my absolute respect and admiration for coping with all that lot - to me it's about as intelligible as ancient Egyptian!

Cheers,
Nigel.

Posted on: 2/3 10:16
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Re: Stupid idea for acceleration card and AROS

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2008/2/5 6:58
From Sunny Finland
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Quote:

ntromans wrote:
You have my absolute respect and admiration for coping with all that lot - to me it's about as intelligible as ancient Egyptian!

Cheers,
Nigel.


Well then there's two of us... I just thought that it might be enough to place the 6.3.0 patches to corresponding places on 7.3.0 source. (I may very well have forgotten to copy/apply some part of the patch) It might work for different ARM target (those that are already there for AROS) but I find it difficult for the cortex-m7 target. GCC builds the libgcc.a and it seems to have aeabi functions inside but it just won't use them. The multilib part seems to fail.

Maybe I should try to build the ARM-none-embedded version as ARM-AROS and not try the mainline GCC...

Posted on: 2/3 23:47
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Re: Stupid idea for acceleration card and AROS

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2008/2/5 6:58
From Sunny Finland
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I haven't managed to build a working GCC compiler for the Cortex-M7, but I've been thinking more about using the STM32F7 mcu in place of the mc68000 on one of my Amiga's.

If the 7.xxx MHz clock is divided by 2 before feeding it into the STM32F7 then also the E clock can be made inside the STM32F7.

Single 5v tolerant d type flip flop takes care of the voltage translation and division by 2.

>D type flip flop< datasheet

>Clock settings< on STM32CubeMX

E clock comes from the STM32F7 and is it's input clock divided by 5 (5 is the maximum diviser size :) )

SRAM interface from the STM32F7's FMC has also nWAIT input, similar to DTACK, so minimum of glue logic is needed.

Posted on: 2/9 10:07
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