The J1 CPU

Introduction Problem Version 1 Redone Application Conclusion
James Bowman
Instruction formats
15 14 13 12 11 10
1 value
15 14 13 12 11 10
0 0 0
15 14 13 12 11 10
0 0 1
15 14 13 12 11 10
0 1 0
15 14 13 12 11 10
0 1 1
R → PC
9
9
9
9
9
T ′
8
8
8
8
8
7
7
6
6
5
5
target
7
6
5
target
7
6
5
target
7
6
5
T → N
T → R
N → [T ]
4
4
4
4
4
3
3
3
3
3
rstack ±
dstack ±
012
literal
012
jump
012
conditional jump
012
call
012
ALU
The J1 CPU