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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <mach.h>
include <knet.h>
include "m70.h"
# ZRDM70 -- Initiate an asynchronous read from the IIS.
procedure zrdm70 (chan, buf, nbytes, offset)
int chan # FCB pointer for device
char buf[ARB] # output buffer
int nbytes # number of bytes to read
long offset # not used for this device
pointer fcb
short rwflag, opcd, nwords, ier
data rwflag /IIS_READ/, opcd /EFN/
begin
fcb = chan
if (FCB_KCHAN(fcb) == NULL) {
nwords = nbytes / (SZ_SHORT * SZB_CHAR)
call m70io (Mems[fcb], buf, nwords, rwflag, opcd, FCB_IOSB(fcb,1),
ier)
FCB_NBYTES(fcb) = nbytes
FCB_EFN(fcb) = opcd
if (ier != 0)
FCB_STATUS(fcb) = ERR
else
FCB_STATUS(fcb) = IIS_READ
} else
call zardbf (FCB_KCHAN(fcb), buf, nbytes, offset)
end
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