Comparing the PCBs of the three siblings SR-50A (Version 2), SR-51A (Version 2), and SR-56 (in TI internal documents often dubbed SR-51P for Programmable) reveals some very subtle differences, too.

2019年10月13日 · It has 10 digits of precision on an LED display, using a sealed 3xAA rechargeable battery pack. It is capable of a 100-step program, its programmability being similar to what we might consider a “macro” today. The unit has an array of keys which is more akin to the scientific calculators of today.

This scientific calculator is a modification of the Texas Instruments SR-50A and a less expensive device than the contemporary SR-52. A handheld electronic calculator, it has a black plastic case with an array of forty small rectangular plastic keys.

Texas Instruments Manuals. I have recently obtained permission from Texas Instruments to post scans of pre-1984 calculator documentation here. Here are the manuals that I have so far managed to scan.

The Texas Instruments SR-56 is the only key programmable calculator offering automatic loop-control and subroutine capabilities. The solutions to many problems require iterative processing. The two dsz instructions of the SR-56 will allow you to automatically control loops. Four subroutine levels allow you to build

Here at the Datamath Calculator Museum we label SR-56 calculators manufactured significantly before May 1976 as "SR-56 (Pre-Launch)" to study their differences (if any) to later SR-56 calculators.

Overall, the Texas Instruments SR-56 is a versatile and reliable calculator that offers a range of scientific functions and programmable capabilities. Its compact design and rechargeable battery make it a convenient tool for various mathematical and scientific applications.

This series of programmable calculators (SR-52, SR-56, TI 57, TI 58, TI 58 C, TI 59) really set the tone of most programmable scientific calculators to follow. But they also clearly borrow from the fabulous HP calculators that came before them.

Introduced only few month after the SR-52 Programmable, the SR-56 could be considered its small brother. The housing looks identical to the SR-50A Scientific Calculator and SR-51A Statistical Calculator, only the [LRN] key reveals its true capabilities.

Shortly after the legendary HP-65, however, TI also introduced its first programmables: the SR-56, and the high-end SR-52, a calculator with magnetic cards and an I/O connector for an external printer unit.