TI-74 Basicalc

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The Texas Instruments TI-74 Basicalc is a programmable calculator, which was released in 1985 to replace the Texas Instruments Compact Computer 40. One variant, the TI-74S, has a blank faceplate instead of secondary functions to allow for customization (otherwise it is the same as the 74). Both models accepted customized ROM-modules. The TI-95, released at the same time, was a keystroke programmable descendant of the TI-59 and TI-66, with the same general form factor, but a two-line display (the second line was for function key definitions).

Technical specifications

Date of introduction: 1986
Display technology: LCD dot matrix
New price: $135.00 (SRP 1988)  DM 348.00
Display size: 31 (10 + 3)
Size: 3.8" x 8.0" x 1.0"  96 x 204 x 25 mm3  
Weight: 10.3 ounces, 290 grams
Batteries: 4xAAA
Date of manufacture: mth 06 year 1987
CPU: TMC70009
ROM: HN61256
RAM: HM6264 8 KB 24 characters per line


This unit together with hard case and manual was very kindly donated by Douglas Muir.

Manufacturer: Texas Instruments
Date: 1985

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This exhibit has a reference ID of CH19472. Please quote this reference ID in any communication with the Centre for Computing History.


TI-74 Basicalc

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