Re: RP2350 and Pico 2 - things missing

On Thu, 2024-08-22 at 19:18 +0000, Charlie Gibbs wrote:

FAR and NEAR specifiers used with JMP

 
  The obscenity was these qualifiers making their way into C
source
code - try writing (or even reading) the declaration for a near
pointer to a function returning a far pointer to an array of
functions returning near pointers to integers.
 
  Then realise that you *alos* wanted this source code to be
portable.

 
A bloody pain in the ass, all of it.  Forget the 640K barrier -
I was much more concerned with the 64K barrier.  I wound up
writing pointer normalization routines and all sorts of other
hacks to handle large tables - and still keep it compatible
with *n*x.  I only recently stripped out all that crap.
Good riddance.

Huge pointers for code + data for up to 1MB, oh the Ghods, much slower
than using using tiny pointers limited to 64KB segments. But yes,
playing games with segment registers and splitting data into 64KB
segments was significantly quicker and generated smaller binaries.
--
Tactical Nuclear Kittens