DATAMATH  CALCULATOR  MUSEUM

American Micro Products  Manual CROM Selector for PC-100A

Date of introduction:  1979 Display technology:  
New price:  
 $90 (October 1981)
Display size:  
Size:  2.8" x 5.0" x 1.4"
 72 x 126 x 35 mm3
   
Weight:  5.6 ounces, 160 grams Serial No:  
Batteries:   Date of manufacture:  
AC-Adapter:   Origin of manufacture:  USA
Precision:   Integrated circuits:  
Memories:      
Program steps:   Courtesy of:  Gilles Collas

Texas Instruments introduced with the TI-58 and TI-59 in May 1977 a novelty, the Solid State Software Modules™ with up to 5000 program steps. On the backside of the TI-58/59 you'll notice a small lid with a place for a module. The Master Library with 25 different programs was included, a lot of other modules were available.

American Micro Products of Richardson, Texas addressed with this unique CROM Selector three known problems:

The access to the module compartment isn't possible with
   the TI-58 or TI-59 attached to the printing cradle PC-100A.
The calculator has to be switched off to change the module.
The contacts inside the calculators are sensitive to mechanical
   and electrical destruction.

The Module Selector fits neatly into the charging bay of the PC-100A and holds up to four Solid State Software Modules in place. Selection of the module is simple and straightforward with a 4-position rotary switch.

The Module Selector should be compatible with the PC-100B and PC-100C printer cradles, too.

American Micro Products sold in 1979 not only the featured Manual CROM Selector, but even an "Automatic CROM Selector:.

    


 

horizontal rule

If you have additions to the above article please email: joerg@datamath.org.

© Joerg Woerner, November 2, 2011. No reprints without written permission.