I don't get it... HP 50G
in [HP48]
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From: Raymond Del Tondo on 22 Jul 2006 07:25 Hi, "Harold Climer" <Harold-Cllimer(a)utc.edu> schrieb im Newsbeitrag news:qr62c29pku4ahl5kcq9kahtu5fg80houga(a)4ax.com... > On 21 Jul 2006 11:18:42 -0700, "Harout Hedeshian" > <harout(a)hedeshian.net> wrote: > >>[..] > If you are a Surveyor or someone who needs a true RS232 port it is > revolutionary. > If it is really a true RS232 port, it will be an inexpensive way for > small surveying firms to upgrade from the now no longer manufactured > HP48GX, instead of paying $2000.00+ for a dedicated data logger. > If it does not have a true RS232 interface, HP has dropped the ball > again. > Now you know the answer: The 'serial' port of the 50g works the same as in the 49g- (aka 48gII). You'll need a special cable (hopefully included) with a built-in voltage level converter. So obviously they weren't able to get 5 volts out of 4x1.5 volts batteries;-) Reminds me of some of the old Sharp (or Casio) micro BASIC bread slices, where you needed a special level converter for the serial interface, too. Raymond
From: aplnub on 22 Jul 2006 08:02 Mick Anderson wrote: > "Harout Hedeshian" <harout(a)hedeshian.net> wrote in message > news:1153475712.994911.139430(a)s13g2000cwa.googlegroups.com... > > > Will someone explain the difference? Or better yet, is there a document > > that does that already? I was hoping for a higher resolution screen. I > > would soil myself in excitement if they released a qvga grayscale model > > (or even full vga) and ran it in native ARM. > > Have a guess at how long it would take to port the existing code to pure > ARM. 3 man years?
From: Raymond Del Tondo on 22 Jul 2006 10:20 "aplnub" <eric(a)installuniversity.com> schrieb im Newsbeitrag news:1153569773.391860.302000(a)i3g2000cwc.googlegroups.com... > > Mick Anderson wrote: >> "Harout Hedeshian" <harout(a)hedeshian.net> wrote in message >> news:1153475712.994911.139430(a)s13g2000cwa.googlegroups.com... >> >> > Will someone explain the difference? Or better yet, is there a document >> > that does that already? I was hoping for a higher resolution screen. I >> > would soil myself in excitement if they released a qvga grayscale model >> > (or even full vga) and ran it in native ARM. >> >> Have a guess at how long it would take to port the existing code to pure >> ARM. > > > > 3 man years? > Sounds somewhat optimistical;-) Remember how long it took to get the initial 49g (rubber duck) somewhat stable... However there already was a thread about HP calcs and man years.
From: Anssi Saari on 22 Jul 2006 09:30 "Mick Anderson" <andersonm(a)telstra.au> writes: > Have a guess at how long it would take to port the existing code to pure > ARM. Well, they could still provide an interface for native ARM apps. As I understand it, Palm's doing that, the current ARM-based models can still run the numerous 68k apps.
From: John H Meyers on 22 Jul 2006 17:21
On Sat, 22 Jul 2006 06:25:53 -0500: > obviously they weren't able to get 5 volts > out of 4 x 1.5 volts batteries ;-) It wasn't a problem even with three 1.5v batteries in the 48 series, was it? All the older calculators have had self-contained switching power supplies, which is no big deal (they're even inside 1-cell LED flashlights) [r->] [OFF] |