C subroutine library

src.a		- source for /lib/libc.a routines


	csignal.s	- version of signal() which allows function to return
			  to point of interruption. If signal function
			  doesn't need to return, use smaller signal()
			  in liba.a

	rti.s		- "equivalent" of pdp-11 rti instruction
			- pops psw status, location counter & stack pointer off
			  stack (see sig.c)
			- used only by OS SVC interpreter

iobuf.h	- declaration of i/o buffer used by getc, putc
