Loading OS from Flash ROM!

Bari Ari bari at onelabs.com
Mon Jul 21 12:17:01 CEST 2003


Bari Ari wrote:

> John Praveen wrote:
>
>> On Fri, 18 Jul 2003, John Praveen wrote:
>>
>> > I am new to linux bios. My project is based on
>> > geode chip. I want my linux OS to be in Flash ROM(capacity 4 MB).
>>
>> >I have sad news. You can't get a 4 MB chip on that board, I bet.
>>
>>            I can't get to this. This means that 4 MB Flash ROM cannot 
>> be used with SC1200? Or is it not supported in LinuxBIOS. Plz help me 
>> to understand these.
>>
> The SC1200 can address up to 16MB of memory on the ISA bus (which is 
> where the Flash Rom would be located for the BIOS if strapped for ISA 
> BIOS ROM seek after reset) or it can use the LPC bus (if strapped for 
> LPC BIOS ROM seek after reset). This is what the SC1200 is capable of 
> if you're designing your own board. It's just unlikely that if you're 
> using an off the shelf board that it will support >2MB of flash ROM on 
> ISA. If it uses an LPC ROM then it's probably soldered down and a 2MB 
> device. LinuxBIOS can support a 4MB device or up to a 4GB flash ROM 
> (if they actually existed). 

Sorry about the typos. (MB megabyte vs Mb megabit) That last sentence 
should be:

It's just unlikely that if you're using an off the shelf board that it 
will support >2Mb of flash ROM on ISA. If it uses an LPC ROM then it's 
probably soldered down and a 2Mb device. LinuxBIOS can support a 4MB 
device or up to a 4GB flash ROM (if they actually existed).

-Bari





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