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Texas Instruments Portable Professional Computer - Multifunction Board Installation Manual

hanshuebner

Member
Joined
Aug 27, 2020
Messages
23
Location
Berlin, Germany
Hi,

I have a Texas Instruments Portable Professional Computer on my bench for repair and upgrade. Together with the unit, I received a couple of Multifunction Boards (#2245876) with memory and clock (no serial or parallel daughter cards, sadly):

PXL_20230328_154826473_2.jpg


Amazingly, two of the boards still have 3.4V coming out of their batteries.

There is also a memory upgrade daughter board (256K Secondary Multi-Function Kit, #2245895):

PXL_20230328_154851674.jpg


Most of the boards have some failed memory chips and I'm looking forward to putting all of them into sockets. I have not found a manual or a driver disk image, however, so I would not know how to test the clock functionality. Also, maybe some jumpers need to be set for the 256k expansion to be recognized, so a manual would be most helpful. Can anyone help me out?

TI also have a Persyst Time Spectrum for TI - Likewise, if anyone has documentation that they can share, I'd be most grateful.

PXL_20230328_161329052.jpg



Thanks,
Hans
 
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