50g

Hi Michael.

 

> First, flag 123 (Allow/Forbid Switch Mode) does not seem to have any

> effect - or there are certain operations that override it.

 

Yes, it seems not to have effect with *most* commands....

Please, have a look at this thread:

http://groups.google.com/group/comp.sys.hp48/browse_frm/thread/404bcf5d68e10544/5ef7d3e42fc71f4e?lnk=gst&q=flag+123#5ef7d3e42fc71f4e

 

> Second, what does the 'modulo' setting in the CAS mode adjust screen

> do? I've never (as far as I know) had a reason to change it, so I

> leave it at '13', but it's always been a mystery.

 

To the best of my tiny knowledge,, the “modulo” refers to “modular arithmetic” – for example, please see:

http://en.wikipedia.org/wiki/Modular_arithmetic

where the “numbers "wrap around" after they reach a certain value”. i.e. the modulus.

By the way, the CASCFG (CAS ConFiG) command resets the modulo value at 13, whereas the pressing [NXT][RESET ], then selecting [RESET ALL] and pressing [OK], when the CAS Modes input form is displayed, resets modulo to the value of 3.

 

> Finally, why is HEX the default base? Will changing to BIN affect

> normal day-to-day operations?

 

Don’t know why it’s the default setting, but it *should* not affect the day-by-day operation, unless you need to mess with some SYSEVALs, i.e. commands that use arguments like “#4A3Bh” – if that’s the case, the default base is assumed for such entries (and you’ll not need to put the trailing “h”), but if it’s not an HEX but a BIN, you will want to switch to BIN, otherwise you’re very likely to crash your 50G’s memory.....

 

Hope this helps.

Best regards.

Giancarlo

 

-----Messaggio originale-----
Da: 50g@yahoogroups.com [mailto:50g@yahoogroups.com] Per conto di roywah
Inviato: lunedì 26 novembre 2007 04:12
A: 50g@yahoogroups.com
Oggetto: [50g] Modes and Flags

 

I've had my HP-50g for about a year and gotten fairly comfortable with

it, but there are a few things that I can't figure out.

 

First, flag 123 (Allow/Forbid Switch Mode) does not seem to have any

effect - or there are certain operations that override it. Most of

the time the calculator works as I expect it to, but every now and

then I'll start getting strange results & notice that it's in RAD

instead of DEG. There is another setting that sometimes changes 'on

its own', but it doesn't happen as often and I can't think of it at

the moment.

 

Integration seems to force a switch from DEG to RAD sometimes

(regardless of the state of flag 123), but not always. Sometimes the

switch is (or at least seems) completely random I'll work one problem

and everything is as expected, then the next problem weird things

start happening.

 

I don't remember having this problem when I first got my calculator,

so I'm guessing it's a [side] effect of another flag/mode setting.

Any ideas how to prevent unwanted flag/mode changes?

 

Second, what does the 'modulo' setting in the CAS mode adjust screen

do? I've never (as far as I know) had a reason to change it, so I

leave it at '13', but it's always been a mystery.

 

Finally, why is HEX the default base? Will changing to BIN affect

normal day-to-day operations? I've switched back & forth a couple

times, since I rarely do anything in hex, but figured there was

probably a reason it's set to hex by default.

 

Thanks in advance,

 

Michael

 

 

 

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