[LMH]SIB, Config ROMs, Fonts, Diagnostic Engine Code

[Nyef]

On Sun, 17 Aug 2003, Steve Krueger wrote:

> Alastair,
> 
> If you are looking at the 68000 code to try to work out the NuPI
> function, that seems a difficult task.

Well, yes. It is. It's also a task I have some familiarity with, having 
figured out several other systems from looking at disassembly listings.
Until now, though, it's always been expansion hardware based on a system 
that I was already familiar with...

>                                         The NuPI provides a very clean
> command block interface that was well documented (in lroy-qdev and
> elsewhere).  I find that I do have the NuPI manual that we sent out with
> systems and it describes the command block interface in pretty good
> detail.
> 
> I'm not going to type the whole thing in -- I'm considering investing in
> a scanner, so maybe I'll get it scanned in, eventually.

Mmm... I'm know I'm not the only person who would appreciate having some
of your documentation scanned in and available.

> For now, a few bits of interesting (possibly useful) info on NuPI (this
> could be just a tease):
> 
> Onboard RAM is 2Kx16.  There is also an onboard FIFO RAM of 1Kx16.

Okay, I knew about the 2Kx16 RAM, but I hadn't run into the FIFO just 
yet...

> The 68K interrupts are:

<-- snip -->

Ah, thank you. The only one of those that I had the slightest idea about 
was the level 4 (and figuring that out involved a fun discussion on IRC).

Anyway, I'm not sure how far I'm going to go with this approach right now. 
There's still quite a bit to do on exploiter, after all...

---------------------------
All programming can be viewed as an exercise.
---------------------------
Alastair Bridgewater
e-mail: nyef@softhome.net