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- Newsgroups: comp.unix.admin
- Path: sparky!uunet!unipalm!steven
- From: steven@unipalm.co.uk (Steven Vincent)
- Subject: Re: Wanted: TSR LPD for DOS
- Message-ID: <1993Jan21.122732.3849@unipalm.co.uk>
- Cc: hennie@nuustak.csir.co.za, ccowboy@seer.gentoo.com
- Organization: Unipalm Ltd., 216 Cambridge Science Park, Cambridge CB4 4WA, UK
- References: <hennie.727432803@nuustak> <1993Jan19.175725.16171@seer.gentoo.com>
- Date: Thu, 21 Jan 1993 12:27:32 GMT
- Lines: 57
-
-
- >In article <hennie.727432803@nuustak> hennie@nuustak.csir.co.za (Hennie Rautenbach) writes:
- >>Hi
- >>
- >>I'm looking for a utility that gets loaded into TSR on a DOS PC transforming
- >>it into a Print Server to which UNIX "lpr" jobs can be spooled to accross an
- >>ethernet network.
- >>
- >>Has anyone seen or come accross such a utility ? If so, where can I find it ?
- >>
- >>Please mail me directly as I'm not a frequent reader of this group.
-
- >Please mail this newsgroup w/ any information as some of us are frequent
- >readers of this group.
-
- This is frequently discussed in comp.protocols.tcp-ip.ibmpc. Several
- companies (inc PC-NFS and BW-TCP) produce such programs. My experience
- of them so far is that it is not a good idea. The limitations on DOS
- TSRs is such that only very limited functionality is possible and these
- LPDs have very finite limits as to how many connection they can safely
- accept at time (apparently 1 Sun is max!). In addition filters are not
- generally supported and the DOS performance for the foreground app suffers
- badly. For our own in House purposes we either use an old PC as a dedicated
- printserver (low Use - accounts wide dot matrix) or 386SX boxes running OS/2
- and FTP's PC/TCP for OS/2. In all cases the print jobs are routed through
- the LPD of one SUN so that the PC's receive the jobs as a single stream.
- This also has the administration advantage that if a printer is moved only
- one printcap file needs to be changed rather than 60 + PC's running different
- software, 2 Vaxen and 12+ Unix boxes of different Flavours.
-
- Supporting DOS based TCP/IP products I get at least 1 call a week on
- the use of PCs as printservers while being used for other apps.
-
- I don't like the truth as I know it. I am seriously looking into
- writing a simple TSR to emulate the HPJetDirect cards or a terminal
- servers reverse connection serial port. If the Unix box spools the
- job and feeds it out over a raw TCP connection the PC does not need
- to do anything more complicated than pass the data out the port and
- handshake the TCP connection. This should be much simpler and
- impose far less load on the single-tasking DOS box, I shall also find
- out if the rumors I heard a few years back about the PC's Parellel
- port and IRQs being broken are true (something about the original
- design using Edge triggered and the BIOS checking for level triggering
- of IRQs). If HPJetdirect cards and Spider Terminal servers can
- support printers this way it I feel that PC support would be useful.
-
- Comments Please.
-
- ================================================
- Steven Vincent, steven@unipalm.co.uk
- Unipalm Ltd. (44) 0223-420002
- Cambridge,
- England.
- ================================================
-
- servers can work this wayy
-
-