🚀 go-pugleaf

>This may not be the correct place to ask but...

I believe there is a group for sun hardware users.

>I'm trying to connect a dot-matrix printer to my Sun Sparc 1+
>through a parallel connection. Unfortunatley there are THREE
>female 25-way d connectors on the back - one marked A, another
>B and one unmarked! I would guess that two are serial and
>help, so can anyone help with this?

Suns do not have parallet ports believe it or not. They have never had them as
far as I know. Even sparc20's dont have them!

This is because if you want to communicate with a printer it expects them to be
connected to a network via an ethernet card. This is how modern lasers work.

You can connect a serial printer though. But seeing as you are asking to
connect a parallel printer I guess you don't have one. Sorry!

>I don't want to send 12V
>serial signals to a 5v parallel printer!

Quite!


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dbt3@aber.ac.uk (DOMINIC TRISTRAM) wrote:


>This may not be the correct place to ask but...
>I'm trying to connect a dot-matrix printer to my Sun Sparc 1+
>through a parallel connection. Unfortunatley there are THREE
>female 25-way d connectors on the back - one marked A, another
>B and one unmarked! I would guess that two are serial and
>one is parallel, but I have no manuals and no-one at work can
>help, so can anyone help with this? I don't want to send 12V
>serial signals to a 5v parallel printer!

A and B are the serial connections. /dev/ttya and /dev/ttyb.
Some Suns have higher voltage serial (RS432 or some such)
but I think that's the more expensive (£100,000) ones.



----------------------------------------
Aandi Inston  100126.1304@compuserve.com

In article <45bm1m$fq2@idefix.CS.kuleuven.ac.be>,
Geert Uytterhoeven <geert@cs.KULeuven.ac.be> wrote:
>In article <45aqvh$p2i@osfb.aber.ac.uk>, dbt3@aber.ac.uk (DOMINIC TRISTRAM) writes:
>|> This may not be the correct place to ask but...
>|> I'm trying to connect a dot-matrix printer to my Sun Sparc 1+
>|> through a parallel connection. Unfortunatley there are THREE
>|> female 25-way d connectors on the back - one marked A, another
>|> B and one unmarked! I would guess that two are serial and
>|> one is parallel, but I have no manuals and no-one at work can
>|> help, so can anyone help with this? I don't want to send 12V
>|> serial signals to a 5v parallel printer!
>
>Two of the connectors are indeed serial ports, but I don't think a SPARC 1 has
>a parallel port, at least most Suns don't have one.

The only Sun (desktop) workstations which have/had parallel ports are the
following:-

	3/80
	386i
	SPARCstation 4
	SPARCstation 5
	SPARCstation 10
and	SPARCstation 20

The SPARCstation 1/1+ and 2 have two 25 pin serial ports and a 50-way
micro-D SCSI port, plus audio and keyboard micro-DIN sockets.

The SPARCstation SLC and ELCs have the keyboard and audio ports and a
combined serial port a and B in one 25 way D socket.

The SPARCstation IPC and IPX's have two micro-DIN sockets (RS423) serial
ports.

The 3/80 and 386i have standard PC-style parallel ports, the other machines
with parallel ports use a minature AMD socket for which you need to buy a
special adaptor cable.

It's probable that the originator of this thread is mistaking the 50-way
micro-D SCSI port for a parallel port (somehow).

I hope this has helped clear up the confusion.

Steve
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