On Sat, 23 Mar 2002 at 14:36:17, Dilwyn Jones wrote:
(ref: <009c01c1d27a$79f00260$42065cc3@default>)
>OK, to get this resolved, can someone check the data below and
>correct/fill in blanks as necessary so this data can be permanently
>posted somewhere to clear this up.
This is all done after 1am, just having returned from Eindhoven, so
would welcome correction (even by myself when I re-awake later)
DSR/DTR connections are not needed.
QL ser1 is identical to ser2 other than RX/TX and CTS/DTR(RTS) swapped.
This is formatted with TAB so if it appears odd in your mailers, copy
and paste to a text editor. The colours are from the std QL flat cable
(copied for superHermes):
QL <-> PC serial links
----------------------
QL PC
ser1 ser2 QL PC 25D 9D
3 2 white RX RX <- 3 2
5 4 blue DTR RTS -> 5 8
2 3 green TX TX -> 2 3
4 5 red CTS CTS <- 4 7
1 1 black GND GND -- 7 5
I think this way of laying it out says it all.
>
>$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
>
>--------------------------------------------
>UKQL DB9 DB25 SIGNALS DB25 DB9 UKQL
>SER1 SER2
>--------------------------------------------
>3 2 3 RxD-TxD 2 3 2?
>2 3 2 TxD-RxD 3 2 3?
> ? 4 20 DTR-DSR 6 6 ? (QL DTR is actually an RTS)
>1 5 7 GND-GND 7 5 1
> ? 6 6 DSR-DTR 20 4 ? (QL DTR is actually an RTS)
>4? 7 4 RTS-CTS 5 8 5? (QL DTR is actually an RTS)
>5? 8 5 CTS-RTS 4 7 4? (QL DTR is actually an RTS)
>------------------------------------------
>GND=ground
>RxD=Receive Data
>TxD=Transmit Data
>CTS=Clear To Send
>RTS=Request To Send?
>DTR=Data Terminal Ready?
>DSR=Data Send Ready?
>
>DB9 and DB25 respectively are 9 and 25 pin D connectors, as used on
>PCs for example. Some serial ports on some QL style machines (e.g. my
>Aurora!) were wired the same as these. If anyone can fill in the
>question marks above I can put a definitive list on my website to
>'post it on a mountain top' as TF said!
>
>Using the above table, it would appear based on the info I have that
>the correct pinout for a U.K. QL SER1 to 9 pin D COM port, for example
>is:
>===============================
>UKQL 9PIN 25PIN
>SER1 COM COM
>===============================
>1 (GND)----------(GND) 5 7
>2 (TxD)----------(RxD) 2 3
>3 (RxD)----------(TxD) 3 2
>4 (DTR=RTS)------(CTS) 8 5
>5 (CTS)----------(RTS) 7 4
>6 (+12V) not used
>===============================
No - see above. You are possibly thinking QL to modem.
>
>Some questions:
answered above
>1) Can someone fill in the question marks?
>2) Would QL SER2 be wired the same?
Swap TX/RX and CTS/RTS(DTR) pairs.
>3) When connecting to QL
> does one leave unused COM port DTR and DSR on
>PC/whatever unconnected?
Yes.
--
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