How to extract PROM content to bin file? - Printable Version

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How to extract PROM content to bin file? - K-Town Computeum - 07-30-2023

I just got a Tadpole SparcBook and would like to dump the content of its PROM to a bin file for using it with qemu. Can this be done from the Solaris command line using the ‘dd’ command?

• If yes, how exactly would the dd command have to look like?
  
• If no, is there another way of doing this?
  

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RE: How to extract PROM content to bin file? - robespierre - 07-30-2023

Depending on the model of SparcBook you have, the OpenBoot PROM may be mapped at different locations in physical or kernel memory.
I believe there is a "SparcBook 1 Technical Reference" online which may include the maps.
The file /dev/mem is a window into physical memory and /dev/kmem into kernel virtual memory. It's possible to use dd(1) to extract data from these memories using the correct flags and permissions.

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RE: How to extract PROM content to bin file? - K-Town Computeum - 07-31-2023

(07-30-2023, 03:47 PM)robespierre Wrote:  Depending on the model of SparcBook you have, the OpenBoot PROM may be mapped at different locations in physical or kernel memory.
I believe there is a "SparcBook 1 Technical Reference" online which may include the maps.
The file /dev/mem is a window into physical memory and /dev/kmem into kernel virtual memory. It's possible to use dd(1) to extract data from these memories using the correct flags and permissions.

Thanks a lot for the hint. I'll give it a try next weekend.

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