This firmware translates a PS/2 mouse to a USB mouse. The translator

firmware is entirely interrupt driven (with the exception of sending the

data via USB to the host.) An interrupt is generated when the PS/2 start

bit is received, at which time the firmware will begin its receive routine.

In addition to this interrupt, every 168ms a timer overflow interrupts the

main program and implements one state of the mouse state machine. This

state machine handles sending bytes to and translating bytes received from

the PS/2 mouse automatically. All of this is done in the background while

the main program runs in the foreground. The only operation that the main

program implements is sending mouse data to the PC via USB.

-This firmware translates a PS/2 mouse to a USB mouse. The translator firmware is entirely interrupt driven (with the exception of sending the data via USB to the host.) An interrupt is generated when the PS/2 start bit is received, at which time the firmware will begin its receive routine. In addition to this interrupt, every 168ms a timer overflow interrupts the main program and implements one state of the mouse state machine. This state machine handles sending bytes to and translating bytes received from the PS/2 mouse automatically. All of this is done in the background while the main program runs in the foreground. The only operation that the main program implements is sending mouse data to the PC via USB.