DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments BA Real Estate
| Date of introduction: | 1993 | Display technology: | LCD |
| New price: | Display size: | 3 + 10 (7 + 2) | |
| Size: | 5.7" x 2.8" x 0.45" | ||
| Weight: | 2.9 ounces | Serial No: | |
| Batteries: | 2*LR44 | Date of manufacture: | mth 10 year 1993 |
| AC-Adapter: | Origin of manufacture: | Italy | |
| Precision: | 13 | Integrated circuits: | Toshiba T6M51 |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
In
the year 1993 Texas Instruments introduced a new design that replaced both the TI-68
look of the earlier TI-35X and the boxy design of the TI-30
Stat calculator.
The smooth shape together with rubber-like keys was used on 5 different calculators:
 | BA Real Estate Financial calculations |
| TI-30X New display with 10 + 2 digits, 3 memories |
| TI-30X SOLAR With Anylite solar-cells |
| TI-35X Adds 2-dim statistics and hex-calculations |
| TI-36X SOLAR With Anylite solar-cells |
The
internal construction of this calculator line is identical and based on a
flexible printed circuit board (Flex-PCB) for the keyboard and a Rigid-PCB for
the calculator chip in a traditional housing.
This design creates a lot of interconnections but the
calculator line was one of the most reliable designs of Texas Instruments.
Like
all members of this design introduced in 1993 the BA Real Estate calculator
makes use of a Toshiba Integrated Circuit (IC).
The BA Real State does:
| Quickly computes principal and interest payment amounts |
| Computes buyer qualification for both income and loan amount |
| Accepts qualifying ratio values based on local rates to computer the buyer qualifications |
| Calculates PITI (principal, interest, taxes, and insurance) |
| Computes ARMs, bi-weekly payments, Canadian mortgages |
| Solves time-value-of-money calculations |
| Generates amortization schedules with an automatic incrementing feature |
| Converts between nominal (NOM) and effective (EFF) interest rates |
| Includes 32 worksheets for use with clients and to practice calculator skills |
In the year 1996 the design of these calculators was changed again. View the updated BA Real Estate here.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.