Program
step 0 · stopped · sign flag w = 0
Registers
Typewriter
The archive on GitHub: the balanced-ternary core, the loader, and the tapes this page runs
github.com/elaranovikova/setun
Program listing, zone 0
Every cell is one 9-trit word: its address, the word in nonary, the operation, and what it does. The lit row is where the instruction counter C points now. Press Step to move one instruction at a time, or Run to let it go.
What this is
The Setun was a Soviet computer built at Moscow State University from 1959, and the one machine in this collection I did not have to emulate first: it has been emulated before, more than once. This is my own reading of it, a balanced-ternary core carried over from a reference in Python and checked against it word for word. A trit is minus, zero or plus. There are no bits here at all. The book it belongs to is Ternary Dreams.