User:Madmadmadmage/Logic Gates

Note: originally posted on Talk:Computing

Fluid Logic Gate Designs, untested theoretical

I got bored, so here, have some gates. I don't know the offical DF format for fortress snippets, so I've posted them here and hoped someone will be bored enough to format them correctly. I also don't really post on Wikis very much, so if this isn't the kind of thing you're all looking for, delete it. There might also be a few errors; I haven't actually tested any of these, and I'm not exactly sure about the XORs. I know that I could have made a few of these more compact by having the fluid perform the OR themselves, but that would have caused backwash into any dry inputs, possibly corrupting the system. If you have yours set up right, you don't need that.

Also, you might want to connect your reservoir to the floodgates on the other side with another, lever-controlled, floodgate in between. That way you don't have problems with mechanical delays and fluid getting through where it's not supposed to because a gate hasn't closed yet. Madmadmadmage 18:05, 9 December 2007 (EST)

Notation:

. : channel
+ : ground
# : wall
n : floodgate connected to plate number n
p : pressure plate true when depth 1-3
q : pressure plate true when depth 4-7
I : input channel 1
J : input channel 2
O : output channel
D : to runoff tank, so it doesn’t all jam. I’ve assumed a single level for the basic design,
 but a far more efficient model (presented below) assumes that this tank is two levels down,
 and that D is a two-z-level pit. 
H : from full reservoir. Again, basic designs are for a single level, but a far more efficient
 model (presented below) assumes that this tank is one level up, and H is a hole in the ceiling.
Water == true; no water == false

Pressure plates are numbered top to bottom, and then left to right within rows with multiple plates. For example:

##1####2###
#+++34++++#
#++++++56+#
##7########

Single-level designs:
NOT gate:

######
H....#
#++1+#
Ip+..O
#D##+#

OR gate:

##########
H........#
#++++++12#
D.+...+..#
#q+q+.++.O
#I#J#D####

NOR gate:

##########
H........#
#++++++12#
D.+...+..#
#p+p+.++.O
#I#J#D####

AND gate:

#########
H.......#
#++++++1#
D.+...+2#
#q+q+.+.O
#I#J#D###

NAND gate:

#########
H.......#
#++++++1#
D.+...+2#
#p+p+.+.O
#I#J#D###

XOR gate:

###############
H.............#
#++++++++13+++#
#+++++++++..24O
J.p.q+pq.+++++#
####D#I#D######

Alternative XOR gate:

#############
H...........#
#++++++12+++#
#+++++++..12O
J.p+p..+++++#
##D#I#D######

The pair of floodgates closest to the output (the ones in series) are open when they’re connected to the plates, and the pair of floodgates closest to the reservoir are closed when they’re connected to the plates. Additionally, if the two in series are connected to a lever, this setup can be turned into an AND gate simply by pulling the lever.

Multi-level designs:
NOT gate:

###H##
#++1+#
Ip+..O
#D####

OR gate:

#######
IqD+H.#
#+++12#
JqD+..O
#######

NOR gate:

#######
IpD+H.#
#+++12#
JpD+..O
#######

AND gate:

#######
IqD+H+#
#+++1+#
JqD+2.O
#######

NAND gate:

#######
IpD+H+#
#+++1+#
JpD+2.O
#######

XOR gate:

###########
IpqD+H.+++#
#++++13+++#
JpqD+...24O
###########

Alternative XOR gate:

##########
IpD+H.+++#
#+++12+++#
JpD+...12O
##########

The pair of floodgates closest to the output (the ones in series) are open when they’re connected to the plates, and the pair of floodgates closest to the reservoir are closed when they’re connected to the plates. Additionally, if the two in series are connected to a lever, this setup can be turned into an AND gate by pulling the lever.

Madmadmadmage 16:53, 9 December 2007 (EST)