another null modem question

[T_hairy_bootson]

Hoping someone can help

I am trying to connect an Amiga 1000 (KS1.3 no hard drive) to my XP PC using a serial cable I just bought and workbench 1.3 and Amiga Forever.

The A1000 has a female serial port

So I bought a "D25F-D25M Straight through Serial Modem Cable"

and have a DB25 to DB9 reducer on the PC end

the cable i got is sealed so i can not inspect the wiring.

if someone can please tell me where i've gone wrong and what type of cable i need to get.

Sorry I know this has been asked b4 I have searched the Board with no straight forward answer to my question.

[gary]

Your serial cable needs somewhere along the line the TX (tramsmit) and RX (receive) wires swapped around to become what is known as a 'null' modem cable/crossover cable/laplink cable.

It sounds like you have a normal serial cable (straight through) and also a straight though gender converter on the A1000.

Another test would be to attach your PC to a modem using your cable and see if you can communicate with it - if you CAN then that cable is a standard modem/serial cable and not a 'null' modem cable/crossover cable/laplink cable which is what you need.

[T_hairy_bootson]

thanks gary

thought it was a bit too cheap to be a laplink

is there a difference between laplink or null modem cables?

does anyone know if gender converters or db25 to db9 reducers cause any problems when connected to a true laplink cable?

thanks again

[gary]

is there a difference between laplink or null modem cables?

No. 'Laplink' is a name that more salespeople may be aware of these days - just make sure you specify a SERIAL laplink cable.

does anyone know if gender converters or db25 to db9 reducers cause any problems when connected to a true laplink cable?

No. they *should* be straight through which is the same as extending the cable.

NULL modem cable:

   tx    rx    gnd
   |     |     |
    \   /      |
     \ /       |
      X        |
     / \       |
    /   \      |
   |     |     |
   tx    rx    gnd

Gender converter or
modem cable:

   tx    rx    gnd
   |     |     |
   |     |     |
   tx    rx    gnd

[ant512]

For the fastest serial connection, you should really get a "7-wire" cable - this has 7 pins connected, as opposed to the usual 3. I'm not sure what the pinouts are, though - you'll have to Google for that yourself.

[T_hairy_bootson]

I ended up taking that serial cable back to the shop

I went to my parents house and fished thru all my old pc junk I did manage to find an old laplink cable (parallel)...doh!!

I've read thru some of the faq's on eab and have found i should be able to achieve some kind of connection by hooking them up thru the parrallel ports. I'm gonna see an old freind tomorow he will transfer the programs i need to floppy, so hopefully it should work. if not i'll go and buy a serial laplink null modem cable Ive already got the gender converter so I'll see how I go.

thanks for your help guys

[T_hairy_bootson]

looks like laplink (parallel) is not gonna work on a 1.3 system because PC2Amiga needs kick 2.0

So I'm gonna have to get a serial null modem lead

Its a shame Amiga Explorer doesnt support parallel

Oh well back to the computer shop tommorow hope they dont sting me too much