[rescue] SPARCstation 1 boot woes

[Maciej W. Rozycki]

On Mon, 2 Jun 2025, Dave McGuire via rescue wrote:

> > I don't currently have plans as I quickly modified another project so it's a
> > bit of a mess, I may refactor it in the future for release.
> > 
> > It works pretty much as expected, it just maps the PROM in from the physical
> > address based on the model/series selected, checks for the size and then
> > sends it over XMODEM.
> > 
> > If there is anything specific you are interested in, let me know!
> 
>   Ok, no worries.  I'm just interested in how you mapped the PROM into the
> address space.

 IIUC it's a bare metal app, so it can do whatever hardware permits, such 
as map MMIO locations via the MMU to gain access (I'm not familiar enough 
with the SPARC architecture to know if it has a real mode, in which case 
no mapping would be required and any bus locations could be peeked at 
directly).

 FWIW,

  Maciej