🚀 go-pugleaf

Brian Martin <martinbj@ozemail.com.au> writes:
>David J N Begley <david@melba.nepean.uws.edu.au> wrote:
>> For example, I'll need a serial cable of some sort to connect the dumb 
>> terminal to the SPARC - but on what port?  One of the two 25-pin ports 
>> marked "A" and "B", I assume?  So here I'd just need a 25-pin male to 
>> 25-pin male serial cable (oh, something about a break-out box was 
>> mentioned by the rotten sods who dropped this on me - why might this be so?).

You mention two DB-25 connectors so you do not need a Y cable to use port B.
Just ignore the B connections on the following diagrams and use the A pins
for your first dumb terminal.

+ DB25 A/B serial ports on SPARCstation SLC, ELC, others?
 
        1  unused       9  unused       17 A-RxC (receive clock)
        2  A-TxD        10 unused       18 unused
        3  A-RxD        11 unused       19 B-RTS
        4  A-RTS        12 B-DCD        20 A-DTR
        5  A-CTS        13 B-CTS        21 unused
        6  A-DSR        14 B-TxD        22 unused
        7  A&B-GND      15 A-TxC in (?) 23 unused
        8  A-DCD        16 B-RxD        24 A-TxC out (transmit clock out)
                                        25 unused
 
   Note that only port A has full modem control.
 
+ DB25 A/B serial ports on SPARCstation LX, SPARCclassic, and
  SPARCstation 10, others?
 
   As for the SLC/ELC, but with additional signals for the B port:
 
        11 B-DTR        18 B-TxC in     25 B-TxC out
-- 
David Wilson	Dept CompSci Uni Wollongong Australia	david@cs.uow.edu.au