isatty
kbdio
kgetc
kputc
nullgetc
nullopen
nullread
nullwrit
readcopy
slclose
slcntl
slgetc
slopen
slputc
ttycntl
ttygetc
ttyiin
ttyinit
ttyiproc
ttyopen0
ttyoproc
ttyputc
ttyread
ttywrite
vidio
writcopy
