Xerox Alto I User Manual

Alto Hardware Manual
Section
5: Miscellaneous Peripherals
42
bit+- syndromeMapping[syndrome] (see table below)
if bit= -1 then error ("impossible"
syndrome)
enter
the algorithm above at 0:.
The syndromeMapping maps a 6-bit number (range 0 to 63) into the number of the bad bit (0 to 38)
or
-1 if the syndrome is incorrect:
0
1 2
3
4
5
6
7
0 38 37 36
-1
35
-1
18
-1
(syndrome values 0 to 7)
10 34
29 14
-1
7
-1
22
-1
20
33
27 12
-1
5
-1
20
-1
30 2 31 16
-1
9
-1
24
-1
40 32 26 11
-1
4
-1
19
-1
50
1 30 15
-1
8
-1
23
-1
60 0 28 13
-1
6
-1
21
-1
70 3
-1
17
-1
10
-1
25
-1

Xerox Alto I Specifications

General

Brand	Xerox
Model	Alto I
Category	Desktop
Language	English