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From: tomp@amiga.UUCP (Tom Pohorsky)
Newsgroups: net.micro.amiga
Subject: Re: serial driver query
Message-ID: <469@amiga.amiga.UUCP>
Date: Thu, 2-Jan-86 22:33:37 EST
Article-I.D.: amiga.469
Posted: Thu Jan  2 22:33:37 1986
Date-Received: Sat, 4-Jan-86 06:24:48 EST
References: <876@caip.RUTGERS.EDU>
Reply-To: tomp@stella.UUCP (Tom Pohorsky)
Organization: Commodore-Amiga Inc., 983 University Ave #D, Los Gatos CA 95030
Lines: 9

In article <876@caip.RUTGERS.EDU> louie@trantor.UMD.EDU writes:
>The problem that I've run across is not being able to ask for, say, 20
>characters from the serial device driver without it blocking waiting for
>all 20 to arrive.  I'd like to say, give me up to 20 characters that
>might already be buffered, or block if none are there.

  Under 1.1, DoIO the SDCMD_QUERY command. It will return (in the io_Actual 
field) the number of unread bytes in the serial.devices's input buffer.
Then do a read of the "n" pending characters all at once.