Derniers cours du S3

1 files changed, 4 insertions, 0 deletions

diff --git a/semestre 3/architecture des ordinateurs/td/25-11-26.md b/semestre 3/architecture des ordinateurs/td/25-11-26.md
index e72f90a..47555b1 100644
--- a/semestre 3/architecture des ordinateurs/td/25-11-26.md
+++ b/semestre 3/architecture des ordinateurs/td/25-11-26.md
@@ -73,6 +73,10 @@ $(\bar a.b.c)+(a.\bar b.\bar c)+(a.b.\bar c)+(a.b.c)$
 | 1     | 1     | 0        | 0   | 1         |
 $s=(\bar u_1.\bar u_2.c_{in})+(\bar u_1.u_2.\bar c_{in})+(u_1.\bar u_2.\bar c_{in})+(u_1.u_2.c_{in})=u_1\oplus u_2\oplus c_{in}$ où $\oplus$ est $\mathrm{xor}$ (à refaire)
 $c_{out}=(\bar u_1.u_2.c_{in})+(u_1.\bar u_2.c_{in})+(u_1.u_2.c_{in})+(u_1.u_2.\bar c_{in})=a.b+a.c_{in}+b.c_{in}=c_{in}.(a\oplus b)+a.b$ (à refaire)
+
+$s = (\bar a . \bar b . c)+(\bar a.b.\bar c)+(a.\bar b.\bar c)+(a.b.c)$
+$s = (\bar a . (\bar b + (\bar a.b.\bar c)) . c + (\bar a.b.\bar c))$
+
 | $i_3$ | $i_2$ | $i_1$ | $i_0$ | $a$ | $b$ | $c$ | $d$ | $e$ | $f$ | $g$ |
 | ----- | ----- | ----- | ----- | --- | --- | --- | --- | --- | --- | --- |
 | 0     | 0     | 0     | 0     | 1   | 1   | 1   | 1   | 1   | 1   |     |