Orchid Tiny Turbo XTra, Руководство пользователя

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Installing the 80287
1. Insert the 80287 math chip into the top socket on the Tiny
Turbo XTra so that the mark on the chip indicating pins 1 and
40 are at the same end of the socket’s indentation (aiming
toward the adapters bracket).
2. Make sure all the pins are aligned with the holes in the socket
and press down firmly.
Be careful not to bend any of the pins. If you bend some, be
careful straightening them, because the pins can only be
flexed a few times before breaking.
3. Install the jumper on the pins that correspond to the 80287
clock frequency, 5MHz, 8MHz, or 10MHz.
Note: Your system can have two math chips, an 80287 on the Tiny
Turbo XTra and an 8087 on the computer’s motherboard. The system
will use the 80287 in Turbo mode and the 8087 in PC mode.
When using a math chip on the motherboard, be sure to set
appropriate motherboard switch in the OFF position:
Switch 1, position 2 in an IBM PC
Switch 2, position 2 in an IBM XT
For compatibles, check the manual for that computer.
The two-math chip configuration described above ensures
greater software compatibility. This is because programs use
different ways of determining if a math chip is present: some
look at the setting of the motherboard switch; some look for the
80287 on the accelerator. All of these types of programs will
correctly determine that a math chip is present if the above
configuration is used.