Re: [f-cpu] spec draft about booting F-CPU

[nico <nicolas.boulay@ifrance.com>]

On Sat, 12 Oct 2002 08:42:42 +0100
Yann Guidon <whygee@f-cpu.org> wrote:

> hello,
> 
> this is a first version.
> comments, enhancements, flaws... can be discussed on this list.
> 
> have a nice day,
> YG
> 

I don't understand the interrest of you're "SR interface".

To begin to boot you need a programme to read, and for you, you need some thing to control the state of the booting cpu. What it is a humain ? An other system ?

Why don't we use a single supid ROM interface (eeprom, what ever you want), even serial. A hw mecanisme copy the ROM to the memory and the cpu start execute the code at a predefined adress. Why reinvented the wheel ? If you want to check DRAM, you could start inside the cache memory. 

So you don't want to define a memory map like a working computer should do but you define a things sticked to the cpu silicon ?

I don't understand why physical adress must be continuous ? virtual memory management should play is roll. So why such constraints ?

Each cpu could have it's own eeprom that's not a problem at all. You could have a hardwire code to fixe the cpu numer. this number could be reread throught SR or memory.

I stop reading the rest of the draft, it's to much... "deconnected to a reality".

nicO
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