On Fri, Sep 08 2000 at 16:23:25 +0300, Detelin Batchovski wrote:
> ok, I will try varios combinations to enter OpenFirmware.
> But is that pin-out wright ?
> 
> DIN8                        DB9
> pin1                        pin6
> pin2 (or 2 and 7)           pin4
> pin3                        pin2
> pin4 (or 4 and 8)           pin5
> pin5                        pin3

Well. This is what I use:

     8 7 6                    _________
                             ( 5.....1 )
    5   4 3                   \ 9...6 /
                               `-----'
      1 2

Mini-Din-8        Dsub-9 (Nullmodem)
1 HSK Out         7 RTS
2 HSK In          8 CTS
3 TXD-            2 RX
4 GND             5 Signal Ground
5 RXD-            3 TX
6 TXD+            -
8 RXD+            5 Signal Ground

(The difference is to use CTS/RTS for handshaking wich is IMHO more common
than DSR/DTR)


BTW: It's better to make:

GND  ---------//--------+- GND
RXD+ ---------\\--------+
RXD- ---------//---------- TX

or even better:

GND ----------\\--------+- GND
RXD+ ___ ___ _//_ ___ __|
RXD- ___X___X_\\_X___X____ TX
              ''
(i.e. use a twisted pair for RXD+/RXD-)

instead of:

GND  -+--------//-------- GND
RXD+ -+        \\
RXD- ----------//-------- TX

-- 
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