Vintage Texas Instruments TM990/101MB single-board computer / processor board featuring the highly collectible ceramic Texas Instruments TMS9900JDL 16-bit CPU.

Board markings:

* Texas Instruments TM990/101MB

* PWB: 2490194-0002 D

* Assy: 2490195-0001

* TI TMS9900JDL ceramic CPU

* Made in U.S.A.

* Gold edge connectors

* Multiple vintage TI / Mostek / Malaysia Semiconductor ICs

* Two large DB-style connectors

The TMS9900 was an early 16-bit Texas Instruments processor and is especially desirable in its ceramic package. Individual TMS9900JDL processors alone are currently offered around the $50–70 range.

This board has not been tested, and functionality is unknown. It appears to be substantially complete as shown, but please carefully review all photos for exact condition, components, markings, sockets, connectors and any missing parts.

Sold as-is, untested. No guarantee of functionality.