Post Reply 
stack lift and change sign
08-31-2014, 08:50 PM
Post: #51
RE: stack lift and change sign
Read the first 30 pages of Wickes' "41-48 transitions" who basically states that the HP-48 just extends the way the HP-41 calculates, allowing also objects which aren't just plain real numbers. Still don't get why there's such a bohai about "stack lift" - to me the stack maneuvers of the 48 aren't any better, just different.

Let's look how e.g. (1+2)*(4+5) is calculated on an HP-48 as on an HP-42:

1 ENTER 2 + 3 ENTER 4 + *
Code:

HP-48:  Entry line:  1:    2:        HP-42S: X:    Y:    Z:          
1                1                           1                         
ENTER                1                       1      1                  
2                2   1                       2      1                   
+                    3                       3                          
4                4   3                       4      3                 
ENTER                4     3                 4      4      3         
5                5   4     3                 5      4      3         
+                    9     3                 9      3                  
*                   27                      27

On the 42S, ENTER always duplicates - on the 48, ENTER only duplicates if the entry line is empty. Personally, I prefer a function doing the same always (remember you've no chance to follow that weird behavior of ENTER on a single line display).

d:-/
Find all posts by this user
Quote this message in a reply
Post Reply 


Messages In This Thread
stack lift and change sign - Thomas Klemm - 08-10-2014, 09:48 AM
RE: stack lift and change sign - walter b - 08-10-2014, 11:44 AM
RE: stack lift and change sign - d b - 08-11-2014, 06:08 AM
RE: stack lift and change sign - Paul Dale - 08-11-2014, 06:21 AM
RE: stack lift and change sign - walter b - 08-27-2014, 11:30 AM
RE: stack lift and change sign - d b - 08-27-2014, 02:32 PM
RE: stack lift and change sign - walter b - 08-27-2014, 03:57 PM
RE: stack lift and change sign - Andreas - 08-27-2014, 07:40 PM
RE: stack lift and change sign - d b - 08-29-2014, 04:45 AM
RE: stack lift and change sign - walter b - 08-29-2014, 09:15 AM
RE: stack lift and change sign - walter b - 08-29-2014, 09:47 AM
RE: stack lift and change sign - walter b - 08-29-2014, 04:11 PM
RE: stack lift and change sign - walter b - 08-29-2014, 07:54 PM
RE: stack lift and change sign - walter b - 08-31-2014, 06:23 AM
RE: stack lift and change sign - walter b - 08-29-2014, 08:21 PM
RE: stack lift and change sign - Les Bell - 08-11-2014, 01:41 AM
RE: stack lift and change sign - Paul Dale - 08-11-2014, 06:44 AM
RE: stack lift and change sign - walter b - 08-28-2014, 08:33 PM
RE: stack lift and change sign - Paul Dale - 08-28-2014, 10:05 PM
RE: stack lift and change sign - walter b - 08-29-2014, 12:55 PM
RE: stack lift and change sign - walter b - 08-29-2014, 01:25 PM
RE: stack lift and change sign - walter b - 08-29-2014, 02:04 PM
RE: stack lift and change sign - walter b - 08-29-2014, 02:25 PM
RE: stack lift and change sign - walter b - 08-29-2014, 03:05 PM
RE: stack lift and change sign - Paul Dale - 08-31-2014, 07:25 AM
RE: stack lift and change sign - RMollov - 08-31-2014, 09:40 AM
RE: stack lift and change sign - walter b - 08-31-2014, 11:26 AM
RE: stack lift and change sign - walter b - 08-31-2014 08:50 PM
RE: stack lift and change sign - Paul Dale - 08-31-2014, 09:52 PM
RE: stack lift and change sign - walter b - 09-01-2014, 10:36 AM
RE: stack lift and change sign - Paul Dale - 09-01-2014, 11:38 AM
RE: stack lift and change sign - walter b - 09-01-2014, 06:56 PM
RE: stack lift and change sign - walter b - 08-29-2014, 09:21 PM



User(s) browsing this thread: