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Woz calculates "e"
03-04-2016, 02:40 PM (This post was last modified: 03-04-2016 03:25 PM by Martin Hepperle.)
Post: #1
Woz calculates "e"
Not everybody may know that Stephen Wozniak was also working for HP before becoming famous for his Apples.
Not everybody may know that he tried to sell the idea of the Apple I/II to HP and HP declined the offer.
Today you can find the Story in several places in the Internet.

I also found an article while reading through old issues of BYTE Magazine which some of you might find interesting.
I learned that the HP-41 was also an important tool for Woz in the 1980s. maybe the Apple computers would not exist without the HP-41C and its calculation power ;-)

[The article is too large to attach. Check the magazine out yourself: BYTE 1981, No. 06 (June), e.g. at https://archive.org/details/byte-magazine-1981-06 - warning: the file may be rather large]
Martin
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03-04-2016, 03:20 PM
Post: #2
RE: Woz calculates "e"
Didn't realize archive.org had a collection of Byte scans. There goes my productivity for the day.
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03-04-2016, 07:38 PM (This post was last modified: 03-04-2016 07:39 PM by Steve Simpkin.)
Post: #3
RE: Woz calculates "e"
(03-04-2016 03:20 PM)Dave Britten Wrote:  Didn't realize archive.org had a collection of Byte scans. There goes my productivity for the day.

Yes, I spent entirely too much time this morning just looking at the advertisements from this 1981 edition.
32KB of RAM for your Atari 800 computer for the unheard of low price of only $320!
I think I will just pretend I did not see that link.
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03-05-2016, 09:48 AM
Post: #4
RE: Woz calculates "e"
Here's a direct link to the Woz article "The Impossible Dream: Computing e to 116,000 Places with a Personal Computer"

You might also like the page "Pi Day Rematch: Apple II vs. HP-41C" at
http://jerkwerks.com/pi-day-rematch-apple-ii-vs-hp-41c/
which is of course about computing pi.
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03-06-2016, 07:24 PM
Post: #5
RE: Woz calculates "e"
e^1

A short 12C program commemorating Woz's e^1 program:

0
STO 0
1
2
ENTER
n!
1/x
STO +0
X<>Y
1
-
x=0
GTO 15
GTO 05
RCL 0
1
+
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03-07-2016, 04:46 AM (This post was last modified: 03-07-2016 04:30 PM by Gerson W. Barbosa.)
Post: #6
RE: Woz calculates "e"
(03-06-2016 07:24 PM)Dwight Sturrock Wrote:  e^1

A short 12C program commemorating Woz's e^1 program:

0
STO 0
1
2
ENTER
n!
1/x
STO +0
X<>Y
1
-
x=0
GTO 15
GTO 05
RCL 0
1
+

Just curious about how it would look on the HP-33C red LED display :-)

Code:

01-       1     1
02-      31     ENTER
03-   23  0     STO 0
04-      31     ENTER
05-      22     Rv
06-23 61  0     ST0 * 0
07-       1     1
08-      51     +
09-      21     x<>y
10-  24   0     RCL  0
11-  15   3   g 1/x
12-      51     +
13-  14  74   f PAUSE
14-      21     x<>y
15-       1     1
16-       2     2
17-   4  51   f x>y
18-  13  05     GTO 05
19-      22     Rv
20-      22     Rv
21-  13  00     GTO 00

Edited to fix a typo (33C, not 34C)

P.S.: HP-12C version:

Code:

01-       1     1
02-      36     ENTER
03-   44  0     STO 0
04-44 20  0     ST0 * 0
05-       1     1
06-      40     +
07-      34     x<>y
08-   45  0     RCL  0
09-      22     1/x
10-      40     +
11-   43 31   g PSE
12-      34     x<>y
13-   43 36     LASTx
14-   42 14   f RND
15-   43 35   g x=0
16-43,33 19     GTO 19
17-      33     Rv
18-43,33 04     GTO 04
19-      33     Rv
20-      33     Rv
21-43,33 00     GTO 00

f 2 GTO 00 R/S -->

2.00
2.50
2.67
2.71
2.72
2.72

f 9 R/S -->

2.000000000
2.500000000
2.666666667
2.708333334
2.716666667
2.718055556
2.718253969
2.718278771
2.718281527
2.718281803
2.718281828
2.718281830
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03-08-2016, 11:09 AM
Post: #7
RE: Woz calculates "e"
(03-04-2016 03:20 PM)Dave Britten Wrote:  Didn't realize archive.org had a collection of Byte scans. There goes my productivity for the day.

I still have a collection of actual BYTE magazines, complete from 1977 to 1986. Wondering what to do about them... ;-)

[Image: BYTE.jpg]
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