Numeric Data Processor Test - Toshiba T6400 Maintenance Manual

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3.13 Numeric Data Processor Test

NOTE: To execute this test, the 80486SX CPU must be changed to an 80486DX CPU.
Subtest 01 NDP test
This subtest checks the following functions of the numeric data processor:
This test determines whether or not an NDP is installed by sending one bit of "on"
data to the NDP. If the test determines that an NDP is installed, the test is executed.
3-32
Control word
Status word
Bus
Addition
Multiplication