TI-74
The Texas Instruments TI-74 Basicalc is a type of programmable calculator, which was released in 1985 to replace the Compact Computer 40. • Illustration — TI-74 BASIC Pocket Computer PCB • Illustration — TI-74 BASIC Pocket Computer CPU • Illustration — TI-74 Info Card • Illustration — TI-74 BASIC Pocket Computer With Case The TI-74's architecture is descended from the never-released TI CC-40 Plus. 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.
TI-74
Piotr433 · CC0
- Field
- programmable calculator
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Overview
Overview
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).
Key facts
Key facts
• Manufacturer — Texas Instruments • Introduced — 1985 • Type — Pocket computer • Processor — TMS70C46
Technical specifications
Technical specifications
• TMS70C46 CPU (C70009, another chip from TMS 7000 family also reported) • 31 5×7 character LCD • 32+4 KB ROM • 8 KB RAM • RAM/ROM memory expansion port • Hexbus port • 80 characters per line (31 visible) • powered by 4 AAA-size batteries
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The biographical narrative on this page is based on the Wikipedia article TI-74, revision 1331909979 (EN edition), by its contributors. VALÉORINE has edited that text and built its own documentary record around it. The reused material is available under CC BY-SA 4.0, and this page's reuse of it is offered under the same licence. Everything else on this page — the chronology, the holdings, the evidence, the plates and the connections — is VALÉORINE's own record. Sources and licences.
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1- programmable calculatorTerminology
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The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 14 August 2026.
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