Re: [Etherboot-developers] UNDI driver

[Michael B. <mb...@fe...>]

> 1. Add arch/i386/firmware/pcbios/basemem.c, #ifdeffed with PCBIOS, 
>    containing routines to allocate base memory in the BIOS-expected way 
>    (i.e. by simply updating the value at 40:13).

This is now in place.  I had great fun tracking down why my allocated 
memory was being trodden on every time I did a printf().  Eventually 
discovered that get_memsizes() resets the position of the real mode stack 
to be the top of free base memory, which meant that my allocated base 
memory was being written all over as soon as _real_call got called.  Now 
fixed in that I adjust real_mode_stack each time I allocate or free 
memory.

Question: is there any reason why _real_call can't just calculate the 
stack base each time (by reading 40:13)?  (This would work with PCBIOS, 
but I don't know about LinuxBIOS.)

Michael