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.

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.

[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).

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).

TI-74 BASIC Pocket Computer PCB
TI-74 BASIC Pocket Computer CPU
TI-74 Info Card
TI-74 BASIC Pocket Computer With Case