Texas Instruments Galaxy 9x (1st design) 

Date of introduction:  1991 Display technology:  LCD 
New price:   Display size:  8
Size:  3.4" x 5.5" x 0.65"
 87 x 140 x 17 mm3
Weight:  3.8 ounces, 108 grams Serial No:  
Batteries:  CR2032 Date of manufacture:  week 06 year 1992
AC-Adapter:   Origin of manufacture:  Italy
Precision:  11 Integrated circuits:  Toshiba T6A60
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

With the Galaxy 40x Texas Instruments introduced a calculator performing fractional arithmetic. The Galaxy 9x continued this idea. You may use two different modes:

Euklid's division: 56 / 5 = 11 (Q)  1 (R)
Fractional division: 56 / 5 = 11_1/5

With the SIMP and F-D-key you can shorten results and convert between fractional and decimal display:

3_35/70 SIMP 3_1/2  F-D 3.5

If you study the keyboard of the Galaxy 9x carefully you'll notice some unusual keys like ?, 1000, < or PV. If you know the Little Professor educational calculator you get the idea: Instead using the Galaxy 9x to calculate the result you ENTER and TEST it.

You type 12 * ? = 36 ENTER
Galaxy 9 answers: 1 SOL (1 solution)
You type 2 TEST
Galaxy 9 answers: NO
You type 12 + ? < 15 ENTER
Galaxy 9 answers: 3 SOL (3 solutions)
You type 2 TEST
Galaxy 9 answers: YES

The Galaxy 9x got within two years a changed keyboard design, compare it here. In other countries an almost identical calculator was sold with the Galaxy 9. We know similar siblings with the German Galaxy Junior and the French Galaxy 10.

Think about a programmable calculator in the same package and read more about the Galaxy 67!

horizontal rule

If you have additions to the above article please email:

Joerg Woerner, September 25, 2002. No reprints without written permission.