Texas Instruments 3000 - Manual (Page 104)

80387SX Coprocessor
The 80387SX Math Coprocessor (TI Part No. 2566997-0001) option for your TravelMate
3000 speeds up processing and improves throughput of calculations with application
programs that support a math coprocessor.
You can install the 80387SX Math Coprocessor option yourself, but installation requires
partial disassembly of the computer. If you do not feel comfortable installing the
coprocessor, have your dealer or qualified TI Service personnel install the coprocessor
option.
The coprocessor operates automatically in conjunction with application programs that can
use its processing facilities. No user intervention is needed; therefore, no operating
instructions are needed.
TravelMate 3000 Options 6-9