COURSES > DIGITAL LOGIC DESIGN (EEL3705.SP07.WEB_COHORT1) > COURSE LIBRARY > SUPPLEMENTAL NOTES > USING THE PS/2 PORT FOR KEYBOARD OR MOUSE INPUT |
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The PS/2 Mouse/Keyboard Protocol This web page describes the PS/2 link-layer transmit/receive protocol in detail. It is a good example of a synchronous, bidirectional serial line protocol. This may be useful when trying to understand my keyboard receiver circuit, or when designing your own more sophisticated bidirectional link control circuits. |
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Notes on PS/2 keyboard decoding PS2-keycodes-v4.doc (757 Kb) PS2-keycodes-v4.pdf (207.161 Kb) PS2-keycodes-v5.doc (778.5 Kb) PS2-keycodes-v5.pdf (216.908 Kb) Here are some notes that I started in Fall '06 in the process of designing my PS/2 keyboard decoder, which translates raw keyboard byte sequences into a more "natural" ASCII-based code. I recently revised them (v4) to describe my new greatly-simplified finite-state machine design. Version 5 rearranges the code a little bit. Read the PDF if your version of Word does not support all of the needed fonts. |
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The PS/2 Keyboard Interface This webpage describes the application-layer protocol for PS/2 Keyboard Interface in detail. This may be useful if you want to use the keyboard in a more sophisticated, bidirectional way, with error checking, setting the key-repeat rate, turning the LEDs off and on, etc. |
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The PS/2 Mouse Interface This web page describes the application-layer protocol for mice connected to the PS/2 port. You will need this information if you want to design applications that use the mouse for input. This is a bit more difficult than using the keyboard because a simple unidirectional (receive-only) interface will not work in this case; you need to send commands to the mouse in order to properly initialize it. |
