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PC-1211, PC-1250, etc. TVM
04-01-2021, 04:44 PM
Post: #3
RE: PC-1211, PC-1250, etc. TVM
(03-30-2021 05:07 PM)robve Wrote:  Thanks for sharing!

(03-30-2021 04:58 PM)Dave Britten Wrote:  I'm not sure if the Sharps use binary rather than decimal, but I did notice that solving for PMT in a problem where FV=0, then immediately solving for FV could yield small non-zero values on the order of 1E-5.

FYI. SHARP pocket computers use 10 digits BCD to display values and store values in variables and 12 digits internally to evaluate expressions.

Good to know!

Interestingly, I tested the same TVM program on the EL-5500III that I received in the mail today (this model supports two-character variable names, so explicit * had to be inserted in most of the implied multiplications), and it seems to have better accuracy. Example:

N=360
I=4.75/12 (3.958333333E-01)
PV=141000
FV=0

Solve for PMT, on both machines:
PMT=-735.5227446

Then immediately solve for FV without entering anything else.

PC-1250A (Tandy PC-3):
FV=3.731560805E-05

EL-5500III:
FV=0.
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Messages In This Thread
PC-1211, PC-1250, etc. TVM - Dave Britten - 03-30-2021, 04:58 PM
RE: PC-1211, PC-1250, etc. TVM - robve - 03-30-2021, 05:07 PM
RE: PC-1211, PC-1250, etc. TVM - Dave Britten - 04-01-2021 04:44 PM
RE: PC-1211, PC-1250, etc. TVM - robve - 04-01-2021, 05:50 PM
RE: PC-1211, PC-1250, etc. TVM - robve - Yesterday, 09:17 PM



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