2 Bit Binary Subtractor

144

01:20:50

This subtracts the top two inputs from the bottom two and displays the output (including negatives and it even shows a minus sign with the negatives). I was also gonna make a binary divider with a [quotient]r[remainder] format for the output (for example 8/5 would be 5r3) but it was too confusing so I gave up pretty much before I started.

published 7 years ago

sshsslfun

7 years ago

Nice. Id like to see if it could reach to 10, but maybe not since EC has a limited space, which is something I wish Igor added, an option to select your workspace size. But it seems like Igor has abandoned EC from my POV, maybe its normal to get only one update per year. I wonder what the next update will be. Anyways, I remember I made a 64-bit memory chip with logic gates last year during Irma( Im in florida thats why). It was ALOT of logic gates, but mainly flip flops. Came pretty handy for storing analog data from Arduinos

hurz

7 years ago

You know, all you need is an adder todo subtraction? A + (-B) = C so -B is the two's complement of B and is done by inversion + 1.

jason9

7 years ago

Yes @hurz, that’s what I did. I added the two’s complement of one input to the other input (with the carry in of the adder locked at one) and then added a few more gates in order to display negatives properly. @sshsslfun, I made a 4 bit version if you wanna see.

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