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cc65/libsrc/c64/libref.s
Greg King e63bf1cde1 Used a library-reference method to calibrate lightpen drivers.
The mouse reference is a pointer.  If it's NULL, the driver uses a default.  If it's non-NULL, then it points to a function that the driver can call.  That function will adjust the driver's calibration value.  It could ask the user to adjust the pen; or, it could read a file that holds a value from a previous calibration.

Application writers can choose how it's done: a function that's provided by the library, a custom function, or nothing.
2013-06-23 03:18:28 -04:00

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ArmAsm

;
; 2013-05-31, Oliver Schmidt
; 2013-06-11, Greg King
;
.export em_libref
.export joy_libref
; .export mouse_libref
.export ser_libref
.export tgi_libref
.import _exit
em_libref := _exit
joy_libref := _exit
;mouse_libref := _exit
ser_libref := _exit
tgi_libref := _exit