Corrections to the Computer Design Examples:

[snrdg082102]

Here are the corrections, at least they appear to be correct, to the numbers used in the Computer Design sequence:

Errata THB for Computer Design Examples on pp228-229. An asterisk (*) at the end indicate the corrected item/value:

1. p228 column 1 Example for Hardwiring & Dedicated programing.

"For example a TL 7 Linear Computer with 10 CPU built on a TL 7 world, would require:"

Book Example
10 Linear units
13.5vl
Cr 10000
0.9 EP
10 CPU Output

Corrected Example
10 Linear units
13.5vl
Cr 2500*
0.9 EP
20 CPU Output*

"If that same computer were hardwired, excluding the cost of software/programming, it would only require:"

Book Example
7.5 Linear units (25% fewer because the computer is hardwired)
10.13vl
Cr 7500
0.68 EP
10 CPU Output

Corrected Example
7.5 Linear units (25% fewer because the computer is hardwired)
10.13vl
Cr 1875*
0.68 EP
20 CPU Output*

2. p228 columns 1 and 2 Miniaturization:

For example a TL7 Linear Computer with 10 CPU, built on a TL 7 world would require:
10 Linear units
13.5vl
Cr 10000
0.9 EP
10 CPU Output

Corrected Example
10 Linear units
13.5vl
Cr 2500*
0.9 EP
20 CPU Output*

That same computer built on a TL 8 world would only require:
10 Linear units
12.15vl (10% less because the TL is 1 higher than the required TL of 7)
Cr 10000
0.81 EP (10% less because the TL is 1 higher than the required TL of 7)
10 CPU Output

Corrected Example
10 Linear units
12.15vl (10% less because the TL is 1 higher than the required TL of 7)
Cr 2500*
0.81 EP (10% less because the TL is 1 higher than the required TL of 7)
20 CPU Output*

3. p229 column 1 Example of Standardization

"Original TL 7"

Book Example
10 Linear units
13.5vl
Cr 10000
0.9 EP
10 CPU Output

Corrected "Original TL 7" Example
10 Linear units
13.5vl
Cr 2500*
0.9 EP
20 CPU Output*

"TL 8 Version"
Book Example
10 Linear units
13.5vl
Cr 7500 (25% cheaper because the TL is 1 higher than the required TL of 7)
0.9 EP
11 CPU Output

Corrected "TL 8 Version" Example
10 Linear units
13.5vl
Cr 1875* (25% cheaper because the TL is 1 higher than the required TL of 7)
0.9 EP
21 CPU Output* (1 output unit higher because the TL is 1 higher than the required TL of 7)

"TL 9 Version"
Book Example
10 Linear units
13.5vl
Cr 5000 (50% cheaper because the TL is 2 higher than the required TL of 7)
0.9 EP
12 CPU Output

Corrected "TL 9 Version" Example
10 Linear units
13.5vl
Cr 1250* (50% cheaper because the TL is 2 higher than the required TL of 7)
0.9 EP
22 CPU Output* (2 output units higher because the TL is 2 higher than the required TL of 7)

"TL 10 Version"
Book Example
10 Linear units
13.5vl
Cr 1000 (90% cheaper because the TL is 3 higher than the required TL of 7)
0.9 EP
13 CPU Output

Corrected "TL 10 Version" Example
10 Linear units
13.5vl
Cr 250* (90% cheaper because the TL is 3 higher than the required TL of 7)
0.9 EP
23 CPU Output* (3 output units higher because the TL is 3 level higher than the required TL of 7)

"TL 11 Version"
Book Example
10 Linear units
13.5vl
Cr 1000 (remains at 90% cheaper because the TL is 3 or more higher than the required TL of 7)
0.9 EP
13 CPU Output

Corrected "TL 10 Version" Example
10 Linear units
13.5vl
Cr 250* (remains at 90% cheaper because the TL is 3 or more higher than the required TL of 7)
0.9 EP
24 CPU Output* (4 output units higher because the TL is 4 higher than the required TL of 7)