Hi people,
Patrick 'Patsie' Lina wrote:
> Since the less connectors the better, the first option fails.
> We need at least 4 pins per connector (d0,d1,ack,gnd), so I guess
> a Jack won't work either. Which leaves us with.... *drumroll*
> Door number 2! :-)
>
> Eventho a DIN8 has way too many pins, I guess it will suffice for
> our purpose.
>
> SEND (DIN8 male) RECV (DIN8 female)
>
> d0 1 ---------------+ +-------------- 1 d0
> d1 2 -------------+ | | +------------ 2 d1
> ack 3 -----------+ | | | | +---------- 3 ack
> gnd 8 -----------|-|-|--|-|-|--+------- 8 gnd
> | | | | | | |
> | | | | | | |
> 3 7 6 1 2 8 9
>
> MSX (DB9 female)
>
> The send/recv - male/female part isn't that hard to
> remember. If you don't get that one, you're waaay to
> young to hold a soldering iron as well :-)
>
> We prolly all know what a DB9 looks like about now!
> When looking at a DIN8, the schematics are like this:
>
> female male
>
> 7 6 6 7
> 3 8 1 1 8 3
> 5 4 4 5
> 2 2
>
> So in short:
> pin 1 I D0 -> RECV/fem pin 1
> pin 2 I D1 -> RECV/fem pin 2
> pin 3 I ACK -> SEND/male pin 3
> pin 6 O D0 -> SEND/male pin 1
> pin 7 O D1 -> SEND/male pin 2
> pin 8 O ACK -> RECV/fem pin 3
> pin 9 GND -> BOTH pin 8
So be it! A DIN8 will be *OUR* connector.
Furthermore, the other suggestion made by Patrick 'Patsie' Lina also
seems one we should make a standard:
(MSX/DB9/fem) -+----------------- (SEND/DIN8/male)
|
(RECV/DIN8/fem)
A long cable on the send side. This way the number of connections is
limited (no separate network cable needed). It also limits the chances
of losing (part of) the network ;-))
There is also one thing I want to set straight. The connector I mean
isn't a jack (which only has three 'pins'). I meant a connector used
to connect professional microphones. It looks a bit like this (not
that it matters any more ;-) ):
---
/ o \
/ \
| o o |
\--^--/
By the way, I haven't seen any posting from Maarten ter Huurne lately.
Has he dropped out ;-), have his MSXs blown a fuse (due to no ground
connection) :-(, or is he just waiting to see what connection he must
use?
Jeroen Smael
FutureDisk
Homepage: http://www.futuredisk.msxnet.org/
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