Jumping on the bandwagon - DDCPU-16

[Marco Leise]

Am Sun, 22 Apr 2012 11:55:35 +0200
schrieb "Bernard Helyer" <b.helyer at gmail.com>:

> https://github.com/bhelyer/DDCPU-16
> 
> DDCPU-16 is a D implementation of Notch's (of Minecraft fame)
> DCPU-16, a fictional 16 bit CPU for his upcoming game, 0x10c.
> More info at http://0x10c.com, including specs.
> 
> You'll see a grand total of two source files, and one is only
> really there for my testing. The only interesting module is
> dcpu16.cpu, which contains a class CPU with two public methods of
> note: load(ushort[]) to load code and run(int) to run it for a
> minimum number of cycles.
> 
> The CPU code is completely freestanding, with no dependencies
> (even on Phobos) and is @safe ready, and pure where possible.
> 
> Manu is planning on hooking up some virtual hardware to it (which
> is described in basic form elsewhere). No real reason for this,
> just needed something to fill a Sunday.
> 
> I've only tested it to the extent that I've stepped through 
> Notch's
> example in the spec (the one loaded in main.d) and verified that
> works, but I'm sure there'll be more bugs lurking. If you find
> the bugs that I'm sure are still lurking, create an issue on 
> GitHub.
> 
> 
> -Bernard.

Haha, just today I watched a video about it and thought "D"CPU .. well if that isn't a call for action ;) Unfortunately Java has a native unsigned 16-bit data type (char). Otherwise Notch would probably have chosen D for writing 0x10^c. ;)
As with Minecraft, I like the vision and technical realisation, but I wouldn't pay for and play them. I'm sure you had fun writing the CPU simulator. We wrote one (as a class project) at a vocational school a while back - in Java. It was for an 8086 and I did the CPU core logic. Most functions could be classified (like logical OR/XOR/..., accesses regs,mem,...) but for the rest I didn't find any pattern and called the corresponding class (translated) "ThenAMiracleHappens", referring to the well known comic: http://blog.wisefaq.com/wp-content/uploads/2008/05/amoh-small.jpg
It was spiced with a two lines long ternary operator :? expression and no further comments. :D

-- 
Marco