Broccoli requires delicate handling. If you boil it until it changes colour into a green-yellow tinge you have overdone it. It should remain dark green and be a little crispy, or "al dente". Alternatively you can stir fry it - fast and efficient.

I should perhaps make some witty comments on boiling ...

To follow up on that idea, you could have the window always aligned so that 00 is TOS (which is what you stated) and then 01 is next etc. no matter what the stack pointer was (which I am not sure you indicated).That means massaging stacked values as in the example earlier could be done on zero page ...

I was told many years ago that Am9511 was easily interfaced to Z80 but a dog wrt. 6502. It was possible and I knew someone who did it, using rather a lot of interfacing chips but it was considered painful and expensive.

load_inc16:
lda (0,x) ; look mom, (dp,x) !!

Yes, I should have seen that one. Well spotted.
This also frees up the Y register for other useful things. I thought about using (dp),y but it just doesn't seem to fit into the decompression algorithm very well, except in the degenerate case of Y ...

True, it could be a macro but then again the code density would drop like a brick. In this case the name of the game is code density and everything else can be sacrificed. So to expand on my earlier comment, the typical use case is like this:
lda (POINTER),Y ; load byte
ldx #POINTER ; 16-bit ...

Wouldn't it be possible to push the few zero page locations onto stack rather?

A more intriguing solution is to save data onto the SWEET-16 register are and, for added bonus, use it to do the 16-bit heavy lifting. After all the author brought on the limitations from using Apple 2 as the platform ...

Discrete chips with 6502 etc. are still useful got prototyping boards, especially if you also need analogue parts and cannot make the entire prototype inside an FPGA. WDC makes some truly impressive claims: Annual volumes in the hundreds (100’s) of millions of units keep adding in a significant way ...

I think programming is a mental discipline - like teaching numeracy and simple mathematics, teaching simple programming seems to me to have merit. I liken computer programming to creating or composing music.
Yes! Software, and in my opinion hardware design too, is about creativity.

In days of old ...

No mention of any kind of programming sequence? No mention of any program memory for that matter. Intriguing. Besides what it's made for, what could you do with it...
Well, it looks like a modular system on a chip and a rather complex one too. Add a second 6502 with a tube interface and you get a ...

The instruction TSX is a clear indication that you are about to access the stack directly. So why not use TSX as a mode switch to map the stack temporarily into $100 - $1ff? You could then use TXS to return to the mode where stack lives in its own separate area. Using a separate area for stack ...

The paper is from 2009. I tried to find updates or source code with no success until I saw this: http://lwn.net/Articles/647636/#Comments with a link to an update . There is a Git repository.

Of course it is possible that the author is a capacity on assembly programming but the below extract ...

A modern optimizing C compiler can generate more efficient code than even an assembly language programmer can produce. In this modern highly evolved information age, low level programming is going the way of valves and relay sets.

They have been saying that for at least 30 years. At least. And it ...

There is an issue here about terminology. A "patent" in the US can mean two very different things and should be written in full, not abbreviated into ambiguity:
"utility patent" - what is known as "patent" in the rest of the world - protecting a technical invention
"design patent" - what is known as ...

The 6502 is an elegant processor from a more civilized age, to rephrase the expression. The age was when software and hardware was as much art as it was science. And this is where I remember the old days.

If Forth support is the core here, have you looked at the 65EL02 design by Eloraam?
http://www.eloraam.com/nonwp/redcpu.php
http://www.eloraam.com/blog/2012/04/22/rp-control-internals/
http://integratedredstone.wikispaces.com/RedPower+Control
http://integratedredstone.wikispaces.com/65EL02


He ...