Kaul´s 4 Bit Calculator

Build image: 
In-game name (NO VISITORS! Must be LEARNER rank or higher!): 
Dr_Kaul
Builder name(s) and current ranks: 
[Learner]Dr_Kaul
Creation location: 
X:579 Y:78 Z:42
Machine Features: 
It can do + - * / with 2* 4 Bit inputs (A and B; they also can be entered negative; it works with math rules (f.ex.: -A+B=-(A-B) ) I used RCAs, because i forgot to use ICAs and also I never build ICAs (I can try to build one if you want me to,though). For subtraction I simply used XORs which invert A and the output if - is turned on; it´s also able to calculate a negative output. For multiplication I used left-shifting; it left-shits and saves the output with the right timing into three outpus(2*A 4*A 8*A); then the B input decides which outputs will lead into the adders and if 1*A also should lead in. [I probably could have made it faster but i didn´t want to change the working thing ,too much for now :/] For divison I used sequentiell subtraction until the normal output is negative; it uses 30 ticks clock to reset the old A input and use the old output instead; also the clock counts an adder one up. [Is there another way to divide faster? I didn´t find another method.] For coding the binary number to a binary coded decimal (BCD) number I used the doubble dabble algorithm with a 18 ticks clock(it needs to send 8 signals everytime). For "Decoding" the BCD to a 7 Segment Display I used pulser(1 pulse, 2 pulses, 4 pulses, 8 pulses) which make dropper bring to move as many items into another dropper which gives a certain signal strength out(each ss gives a certain number to the 7 Segment Display) as many pulses it receives.
How To Use: 
Chose input A and B Chose one type of calcuation Chose if A and/or B should be negative Turn the Reset/Calculate Lever on Wait a long time... Now you can see the solution on the Display Now you can turn the Reset/Calculate off and it will reset itself (Wait until you can see the calculation on the display, otherwise the next calculation could be wrong). If something doesn´t seem correctly you can try to press the manual reset button; it also would be nice if you could tell me what and how it happened :).
Request status: 
Approved

Comments

5+5 = 69

By Ecconia

Its was a damned griefer. I rolled his edits back... i can't promise, that its completely undone.

By Ecconia

Your calculator has a small bug: 5 + (-7) = -224

By Ecconia