Hi all!
I still say we stick with DB9 connectors but to be more flexible, here's a
new suggestion: Why not 'split up' the joystickport i.e. redirect pin
1,2,8,9 to one DB9-male and 3,6,7,9 to another.
DB9 Female-Male: (Joystick to send and receive)
1: I DR0 -> RECV (male1)
2: I DR1 -> RECV (male1)
3: I ACK -> SEND (male2)
6: O DR0 -> SEND (male2)
7: O DR1 -> SEND (male2)
8: O ACK -> RECV (male1)
9: GND -> SEND/RECV (both)
DB9 Male1: (RECV)
1: I DR0
2: I DR1
8: O ACK
9: GND
DB9 Male2: (SEND)
3: I ACK
6: O DR0
7: O DR1
9: GND
DB9 Female-Female: (NETC 'Network cable')
pin 1: I DR0 -> DR0 O 6
pin 2: I DR1 -> DR1 O 7
pin 3: I ACK -> ACK O 8
pin 6: O DR0 -> DR0 I 1
pin 7: O DR1 -> DR1 I 2
pin 8: O ACK -> ACK I 3
pin 9: GND -> GND 9
More schematically it would look something like this:
SEND ____ NETC ____ RECV
\m_/ \f_/------------------\f_/ \m_/
____ ____
MSXA\f_/ \f_/MSXB
RECV ____NETC____ ____NETC____ SEND
\m_/ \f_/----\f_/ \f_/----\f_/ \m_/
SEND RECV
\m_/ \m_/
____
\f_/
MSXC
Ofcourse you could also mark one side of your network
cable S(end) and the other side R(ecv) and just connect
6->1, 7->2, 8->3, 9->9
This way you need less wire, but the cable only works
one way. So you have to check which side goes in which
connector. I prefer spending those few extra bucks and
make a propper 2-way cable.
If you 'only' have 2 MSX's then the network cable alone
would be sufficient (a 2-way cable that is!)
I'll see if I can create one of these this weekend
Happy plug-n-playing! :-)
Greetz,
Patsie
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