For those wanting to know how to use SERNET or making suitable cables for serial links, refer to QL Toady Volume 5 Issue 1 page 31 - 35. Basically, if you can get sernet working between 2 SMSQ/E computers, you're made. The one thing the articles didn't cover was the wiring for QL to Other Computers, so can anyone provide that (my QL is in the attic and my Aurora has PC style connectors so I can't help on that one.
If I get time I may put the SERNET article and wiring diagrams on my website soon, especially if anyone can provide suitable pinout diagrams for QL-PC and QL-Q40/Q60 connection leads (are Q40/Q60 serial ports wired same as a PC COM port?) It has been stated here many times: handshaking must be correct for successful serial links. Short files may appear to work well at low baud rates and give the impression you've got the cable right, but as I found to my cost it don't really work for long! 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. $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ -------------------------------------------- UKQL DB9 DB25 SIGNALS DB25 DB9 UKQL SER1 SER2 -------------------------------------------- 3 2 3 RxD-TxD 2 3 2? 2 3 2 TxD-RxD 3 2 3? ? 4 20 DTR-DSR 6 6 ? (QL DTR is actually an RTS) 1 5 7 GND-GND 7 5 1 ? 6 6 DSR-DTR 20 4 ? (QL DTR is actually an RTS) 4? 7 4 RTS-CTS 5 8 5? (QL DTR is actually an RTS) 5? 8 5 CTS-RTS 4 7 4? (QL DTR is actually an RTS) ------------------------------------------ GND=ground RxD=Receive Data TxD=Transmit Data CTS=Clear To Send RTS=Request To Send? DTR=Data Terminal Ready? DSR=Data Send Ready? DB9 and DB25 respectively are 9 and 25 pin D connectors, as used on PCs for example. Some serial ports on some QL style machines (e.g. my Aurora!) were wired the same as these. If anyone can fill in the question marks above I can put a definitive list on my website to 'post it on a mountain top' as TF said! Using the above table, it would appear based on the info I have that the correct pinout for a U.K. QL SER1 to 9 pin D COM port, for example is: =============================== UKQL 9PIN 25PIN SER1 COM COM =============================== 1 (GND)----------(GND) 5 7 2 (TxD)----------(RxD) 2 3 3 (RxD)----------(TxD) 3 2 4 (DTR=RTS)------(CTS) 8 5 5 (CTS)----------(RTS) 7 4 6 (+12V) not used =============================== Some questions: 1) Can someone fill in the question marks? 2) Would QL SER2 be wired the same? 3) When connecting to QL does one leave unused COM port DTR and DSR on PC/whatever unconnected? $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ Tony Firshman wrote: >The only way to get reliable serial connections to/from a standard real >QL is to use a fully handshaked serial lead (CTS/RTS each end - QLs >'DTR' is an RTS). Without Hermes, it needs a terminal program at >4800bps each end, and file transfer protocol to trap the inevitable odd >error.
