Documentation/input/atarikbd.txt

9 provides a convenient connection point for a mouse and switch-type joysticks.
10 The ikbd processor also maintains a time-of-day clock with one second
15 The ikbd communicates with the main processor over a high speed bi-directional
33     0xF8-0xFB       relative mouse position records (lsbs determined by
35     0xFC            time-of-day
61 settable threshold of motion. Regardless of the threshold, all bits of
77 Note that the value of the button state bits should be valid even if the
80 +127...-128 range, the motion is broken into multiple packets.
140 8 bits per byte for transmission to the host. The ikbd remains in this mode
155 6. Time-of-Day Clock
157 The ikbd also maintains a time-of-day clock for the system. Commands are
158 available to set and interrogate the timer-of-day clock. Time-keeping is
166 8. Power-Up Mode
168 The keyboard controller will perform a simple self-test on power-up to detect
170 keys. Any keys down at power-up are presumed to be stuck, and their BREAK
172 keyboard error). If the controller self-test completes without error, the code
202 Executing the RESET command returns the keyboard to its default (power-up)
203 mode and parameter settings. It does not affect the time-of-day clock.
204 The RESET command or function causes the ikbd to perform a simple self-test.
206 of receipt of the RESET command (or the end of the break, or power-up). The
275 default to 1 at RESET (or power-up).
417 time-of-day clock, and monitor the joystick. The rate sets the interval
427                         ; 8 bits per byte, the first sample if the MSB
430 time-of-day clock, and monitor the fire button on Joystick 1. The fire button
459 every Vn tenths of seconds. This provides a velocity (auto-repeat) breakpoint
475 9.22 TIME-OF-DAY CLOCK SET
483     ss                  ; second
485 All time-of-day data should be sent to the ikbd in packed BCD format.
488 only some subfields of the time-of-day clock.
490 9.23 INTERROGATE TIME-OF-DAT CLOCK
494             0xFC        ; time-of-day event header
500             ss          ; second
502     All time-of-day is sent in packed BCD format.
509     NUM                 ; number of bytes (0-128)
617 0C	-
679 4A	KEYPAD -