Member level 5
keyboard interfacing with 8086
hi to all
I want to interface a keyboard (preferrably an AT type) to 8086 or z80 microprocessor. connection is serial and i might use an interface ic such as 8255.
i will be pleased if anyone can help me with his instructions about timing, interface ic, asm program needed &etc.
Advanced Member level 3
8255 interfacing with 8086
The standard AT keyboard uses a serial protocol. No interface ICs are required other than the standard 8255. www.beyondlogic.org gives a pretty complete description of the protocol and connections.
Advanced Member level 5
keyboard interfacing with 8086 mp
Here is another example from Philips. This one is closer to 80-families and also includes all look-up tables. You can easily identify sections of code that will be useless for you (I2C subroutines for example).