Texas Instruments TI-99/4A

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The Texas Instruments TI-99/4A home computer was supplied with a variety of internal keyboards from different manufacturers.

Keyboards

• Alps Electric, made in Japan, with Alps SKCC series switches<ref name="MainByte" /><ref name="DT-Alps-GI" />
• Futaba–Sejin Electron with Futaba MD series switches or Futaba sealed linear switches<ref name="KbdBabel" /><ref name="NFB-Futaba" /><ref name="DT-Futaba-Sealed" />
• General Instrument; the switches are likely to be General Instrument Series S950<ref name="DT-Alps-GI" />
• Hi-Tek:
  • (Part 100511 D) Flat-top Hi-Tek High Profile<ref name="AA-Hi-Tek" />
  • (Part 373-70229B) Waffle frame Hi-Tek High Profile<ref name="DT-Hi-Tek" />
  • Hi-Tek Dovetail Series switches<ref name="YT-Mitsumi-Hi-Tek" />
• Mitsumi, using Mitsumi KSD Type; keyboard part number is KSD-A46YN<ref name="YT-Mitsumi-Hi-Tek" />
• Stackpole, with green-slider Stackpole switch grid<ref name="Flickr-Stackpole" /><ref name="YT-Stackpole" />

References

<references> <ref name="Flickr-Stackpole">Flickr — TI-99/4A Keyboard Switches | Keyboard contacts | briantw</ref> <ref name="MainByte">MainByte Software — TI-99 Keyboard</ref> <ref name="DT-Hi-Tek">Deskthority — Hi-Tek keyboard</ref> <ref name="DT-Alps-GI">Deskthority — Keyboard mystery: Alps 12KC018A for TRS-80 Model III</ref> <ref name="KbdBabel">KbdBabel — KbdBabel Matrix Scanner</ref> <ref name="NFB-Futaba">nIGHTFALL Blog — Texas Instruments TI-99/4A with some Extra Accessories</ref> <ref name="DT-Futaba-Sealed">Deskthority - TI-99/4A with Futaba sealed linear switches</ref> <ref name="YT-Stackpole">YouTube — Texas Instruments TI-99/4A key review (Stackpole switch grid)</ref> <ref name="AA-Hi-Tek">AtariAge Forums — Black keyswitch style TI99/4a keyboard (non membrane) - Wanted</ref> <ref name="YT-Mitsumi-Hi-Tek">YouTube — TI-99/4A mylar keyboard repair</ref> </references>