Minecraft Redstone Project

Greeny1994 · 1 Apr 2013 at 20:47

16 bit add done

That + that probably does equal that. I can't be bothered figuring it out xD

Greeny1994 · 7 Apr 2013 at 16:10

Back on with making this. Tedious part now. changing all the transmitters and receivers to work

Greeny1994 · 7 Apr 2013 at 16:27

Well, 16 bit OR and EXOR done. That makes me about halfway done on the ALU part :/

OR

EXOR

Greeny1994 · 7 Apr 2013 at 18:19

16 bit subtract finished. This one, once again has caused me headaches. There was one or two missing wires that messed the whole thing up

Uploaded with ImageShack.us

Greeny1994 · 8 Apr 2013 at 11:31

The 16 bit upgrade has been done

just need to finish off 3 operations then I can get on with the hard stuff

16 bit decrement

Uploaded with ImageShack.us

Greeny1994 · 8 Apr 2013 at 12:16

Operations are finished for now

Shift Left

Shift Right

Swap Nibbles

Greeny1994 · 8 Apr 2013 at 12:54

The next job I'm going to attempt is wiring up the 3 status registers with 3 multiplexers.

Carry (C) will be a 16th bit overflow taken from the ADD, Subtract, Rotate Left and Rotate Right commands
Digit Carry (DC) will be a 4th bit overflow taken from ADD and Subtract
Zero (Z) will be an OR of all the outputs hooked into a NOT and ANDed with a mux (i think)

Sin_Chase · 8 Apr 2013 at 13:03

This is awesome

Can it play Crysis...yet?

Greeny1994 · 8 Apr 2013 at 13:19

It can add

and it would have to be 16 bit Crysis xD

GlacierMint · 8 Apr 2013 at 14:29

Greeny1994 said:
Operations are finished for now

Shift Left

Shift Right

Swap Nibbles

Ok, I've got to ask (and I'm prepared to look stupid)! How does a Nybble get swapped? Nybbles 1 and 4 look like a straight flip, but nybble 2 has got me scratching my head!

Greeny1994 · 8 Apr 2013 at 14:49

I'm not sure I've done it right, the only thing I could find on the web was that the high and low nibbles get swapped. I haven't done anything with the middle.
This may only work with 8 bit though.
Unless u swap 1 with 2 and 3 with 4

GlacierMint · 8 Apr 2013 at 15:07

Aha, that could well be right. I spent a while Googling and couldn't find an answer! Cheers, makes more sense now

Greeny1994 · 8 Apr 2013 at 15:13

I think I will change it for 1 with 2 and 3 with 4.
Cause you swap the high and low nibbles in a byte.

Greeny1994 · 8 Apr 2013 at 15:29

Changed it

Uploaded with ImageShack.us

GlacierMint · 8 Apr 2013 at 15:33

The examples I keep finding are all swapping nibbles in a octet, whilst I guess at the minute you're swapping the high\low on a 16bit value? Sorry, wish I'd got an answer, but I'm way out of my depth!!

EDIT: LOL! Well that was quick work!

Greeny1994 · 8 Apr 2013 at 15:38

Yeah, I'm feeling I'm getting in way over my head too.
I'm also not sure on the uses of swapping nibbles too.

GlacierMint · 8 Apr 2013 at 15:49

Let's just pretend we didn't have this conversation and I'll pop in when you've got 16bit Crysis running!!

Greeny1994 · 8 Apr 2013 at 18:33

Haha. You won't be coming back, I'm not sure my programming skills will be able to make 16 bit Crysis in assembly language

Got the Flags sorted now. I think that's the ALU finished.

Zero Flag

Digit Carry Flag

Carry Flag (with Digit Carry lit up too)

Not sure if I have the mechanics of these flags spot on, but they work.