A.1. Test interface

Extra registers are provided inside the Keyboard/Mouse interface for test purposes only, and should not be accessed during normal mode of operation. They are memory mapped as follows:

Table A.1. Summary of Keyboard/Mouse interface test registers

OffsetTypeWidthReset ValueNameDescription
0x20W80x00KBDTEST1Keyboard Test Register 1 Test control register.
0x24W30x0KBDTEST2Keyboard Test Register 2 Primary I/O control register.
0x28R8b’0000XX00KBDTEST3Keyboard Test Register 3 Internal signal monitor register.
0x2CR80x00KBDTEST4Keyboard Test Register 4 State machine status register.
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