keyboard error is received. For zs(4) and com(4), -1 causes the driver to
flush it's buffer. This should eliminate missed keyboard codes, such as the
"key repeats forever until another key is hit" problem that happens because
the keyboard idle code gets flushed from the input buffer.
layers. Common middle layer shared by kbd_zs and sunkbd is moved into
the new file. Move shared config directives to files.sun and adjust
ports' files.* accordingly.
Need this to support console/Xsun on Mr.Coffee JavaStation.
Tested on sparc, sparc64 (by martin) and sun3 (by jdc).
