1990/0329/gnot/screen.c (diff list | history)

1990/0329/sys/src/9/gnot/screen.c:4,9 – 1990/0330/sys/src/9/gnot/screen.c:4,10 (short | long | prev | next)
1990/03091		#include "dat.h" #include "fns.h" #include "io.h"
1990/0330		#include "ureg.h"
1990/03091		#include "gnot.h"
1990/0329/sys/src/9/gnot/screen.c:201,209 – 1990/0330/sys/src/9/gnot/screen.c:202,237
1990/0329		duart[0].data = 0x02; }
1990/0330		enum{ Kptime=200 /* about once per ms */ };
1990/0329		void
1990/03091		duartintr(void)
1990/0330		duartstarttimer(void)
1990/03091		{
1990/0330		Duart *duart; char x; duart = DUARTREG; duart[0].ctur = (Kptime)>>8; duart[0].ctlr = (Kptime)&255; duart[0].is_imr = IM_IPC|IM_RRDYB|IM_XRDYB|IM_RRDYA|IM_CRDY; x = duart[1].scc_sopbc; } void duartstoptimer(void) { Duart *duart; char x; duart = DUARTREG; x = duart[1].scc_ropbc; duart[0].is_imr = IM_IPC|IM_RRDYB|IM_XRDYB|IM_RRDYA; } void duartintr(Ureg *ur) {
1990/03091		int cause, status, c; Duart *duart;
1990/0329/sys/src/9/gnot/screen.c:212,217 – 1990/0330/sys/src/9/gnot/screen.c:240,256
1990/03091		/* * I can guess your interrupt. */
1990/0330		/* * Is it 0? */ if(cause & IM_CRDY){ kproftimer(ur->pc); c = duart[1].scc_ropbc; duart[0].ctur = (Kptime)>>8; duart[0].ctlr = (Kptime)&255; c = duart[1].scc_sopbc; return; }
1990/03091		/* * Is it 1? */