Epson LT - 286e - Manual (Page 19)

Processor Speed Test
This test identifies the CPU clock speed and displays a message
similar to this:
Measure CPU speed in Megahertz = 12.00
Coprocessor Test
This test checks the math coprocessor.
If the math coprocessor is not installed, you see this message:
Numeric Data processor not present.
DMA Controller Test
This test performs read/write tests on the memory address
registers and page registers of DMA controller 1 and 2.
During the test, you see this message:
Testing Programmable DMA Controller.
When the test completes successfully, you see this message:
Programmable DMA Controller test
passed OK.
14 System Diagnostics