It would seem however that the addresses some of the info is stored at shouldn't matter to the host, and that the list of parameters following a command from the master, or ...

Yup; this whole idea is basically a non-starter.

In 2010, I was probably thinking in terms of how Forth operates on a ...

A recent e-mail from Garth has reminded me of this post.

I sure am glad nobody implemented this. 12 years of accumulated experience since this post has left me wondering how economical this approach to a configuration mechanism this approach would have been. My current hunch says not very. So, take ...

I'm wondering if anyone knows of a Commodore DOS-compatible file storage device or server software that runs on a (e.g.) Linux PC which uses (and exposes) sectors larger than 256 bytes.

CBM DOS filesystems are limited to 16MB partitions because of the two bytes used for pointers in the filesystem ...

I'm very well versed in Forth, having implemented several dialects myself over the years and having personal interactions with a number of significant members of the Forth community, including Moore, Dr. Ting, and others. I'm a regular contributor to the Silicon Valley Forth Interest Group, where my ...

I'm not sure if this has been mentioned earlier; but, at least in CBM BASIC, integer variables are always slower than floating point variables. This is because CBM BASIC (in order to fit in 10K of ROM) converts integers into floats before operating on them, then back again to store its results into ...

As my previous post hinted, Forth has one more advantage over BASIC, the use of low level code. Once the logic of a program is tested, the slower parts ( like inner loops ) can be rewritten as CODE words. A code definition gets compiled to the same dictionary as high level words, at least on the ...

It's a little bit extra unfair to BASIC considering it's always doing floating point math.
That's perhaps the 2nd contributor to its sluggishness. The 1st is the fact that CBM BASIC is always parsing (tokenized) source code, even when in RUN-mode. Forth doesn't tokenize its source code, it ...

The PLA is the only chip that does any kind of address decoding. The PLA equations contain all that's needed to know what chip receives its chip-select given the current address on the bus. The VIC-II chip is responsible for DRAM timing generation. And the 6510 processor has an I/O port built into ...

Code like this:

addr = $00A000
LDA addr

I believe would select absolute addressing. If the programmer wanted this to be absolute long I'm not sure how that could be specified.
In every 65816 assembler I've personally used, without exception, the code above would generate absolute-long ...

The other thing that I've not seen mentioned is the JMP ($xxxx,X) instruction. Load the function ID into X (ensuring bit 0 is clear), then JML, BRK, or COP. That leaves A,Y for passing an address to a parameter block, or using the stack.

The reason you want to avoid using a single COP and a single ...

One of the simple and tempting things to do to improve the '816 memory map is to hide the vectors until they are needed (using the vector pull signals) - that works well with COP but not with jumps. With the OS in low memory you can then have contiguous memory starting part way through bank 0.
But ...

But my strongest hunch is that the peripheral IC requires completion time for the internal auto-increment Andrew mentioned, and thus isn't capable of accepting back-to-back writes.


To be fair, that's what the RDY signal was intended to address. If they'd used it, the 16-bit write still would ...

My homebrew RISC-V CPU works the same way; instruction and data fetch are on separate memory channels, but with the introduction of an external memory arbiter, may access a common memory pool.
So this is full harvard, where the different memory channels hit different physical RAM chips, and you ...

I still have my Amiga 500 and it still boots today. :)

But what do you do with it? There are Amiga collectors, and Amigans.

Right now, nothing. It is sentimental to me, as my family spent their entire year's savings to get it for me when I was younger. To me, it is a family heirloom.

I have ...

Hmm, I don't think the idea is well-described as NUMA - that's where different parts of the memory system are different distances from the core in question

What is a core? Does it have one memory bus? Two? Four? Eight? Or, should we be more precise and consider masters instead? From the POV of ...