TI-74 explained

Manufacturer:Texas Instruments
Introduced:1985
Type:Pocket computer
Processor:TMS70C46

The Texas Instruments TI-74 Basicalc is a type of programmable calculator, which was released in 1985 to replace the Compact Computer 40.

The TI-74's architecture is descended from the never-released TI CC-40 Plus. TI utilized the CC-40 Plus ROM to create the TI-74's BIOS; it removed the CC-40's internal debugger to gain enough space to add calculator mode to the TI-74. The CC-40 Plus' cassette routines were reused in the TI-74, and the CC-40's Hexbus port underwent a physical footprint change and was renamed to Dockbus. The Hexbus protocol is 100% compatible between the CC-40 and TI-74 with an adapter.[1]

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

References

  1. Web site: Good . Charles . A Compendium of CC-40 Information . WHTech TI-99 Archive . 5 December 2022.
  2. Book: TI-74 BASICALC Technical Manual. 1987. Texas Instruments. dead. https://web.archive.org/web/20130715181033/http://ftp.whtech.com/hexbus_cc40_ti74/ti-74/TI74%20technical%20data%20manual.pdf. 2013-07-15.
  3. Web site: DATAMATH CALCULATOR MUSEUM. 22 December 2013.

External links