Lk250 Keyboard; Math Coprocessor; Math Coprocessors - DEC DECstation 316+ Service Manual

1–12 Overview

1.4.10.2 LK250 Keyboard

The LK250 keyboard provides the standard Digital key
arrangement available in several country-specific language
variations.

1.4.11 Math Coprocessor

The optional math coprocessors listed in Table 1–3 plug into the
main logic board and allow each DECstation to process numeric
data faster.
Table 1–3 Math Coprocessors
Model
Number Description
PC43P-AA 20 MHz Intel 80387 coprocessor for the DECstation
320
+
PC46P-AA 16 MHz Intel 80287 coprocessor for the DECstation
316
+
PC46P-BB 25 MHz Intel 80387 coprocessor for the DECstation
325
C
PC46P-CC 33 MHz Intel 80287 coprocessor for the DECstation
333
C
PC46P-EE 25 MHz WIETEK 4167 coprocessor for the DECstation
425
C
(also compatible with DECstation 320)