mac serial pinouts

From: Lawrence Walker <lgwalker_at_look.ca>
Date: Tue Oct 10 01:24:10 2000

> NeXT Computer Serial Ports
>
> Serial ports A and B use 8-pin miniature DIN (MiniDIN-8) connectors.
> Both ports on a 68040-based NeXT computer are RS-423 compatible; the
> ports on a 68030-based NeXT computer are RS-422 compatible (though
> different). The following diagram and table describe the pin
> configuration of each port:
>
> 8 7 6
> 5 4 3
> 2 1 (ed. drawing makes each location look like a
> socket, not a pin, as would be found on the
> back side of the computer. That matches my
> '040 Cube.)
>
> Pin Signal Pin Signal
> 1 DTR 5 RXD
> 2 DCD 6 RTS
> 3 TXD 7 RTXC
> 4 GND 8 CTS
>
>
> NeXT-to-Modem Cable (MiniDIN-8 to DB-25)
>
> The following table describes the configuration of a cable used to
> connect a 68040-based NeXT computer to an asynchronous modem. This
> configuration supports RTS/CTS hardware flow control.
>
> MiniDIN-8 DB-25
> Pin Signal Pin Signal
> 1 DTR 20 DTR
> 2 DCD 8 DCD
> 3 TXD 2 TXD
> 4 GND 7 GND
> 5 RXD 3 RXD
> 6 RTS 4 RTS
> 7 (Not connected)
> 8 CTS 5 CTS
>
>
> NeXT Null-Modem Cable (MiniDIN-8 to DB-25)
>
> The following table describes the configuration of a null-modem style
> cable used to connect a terminal, printer, or other computer to a NeXT
> computer. This configuration supports RTS/CTS hardware flow control.
>
> MiniDIN-8 RS-232
> Pin Signal Pin Signal
> 1 DTR 8 DCD
> 2 DCD 20 DTR
> 3 TXD 3 RXD
> 4 GND 7 GND
> 5 RXD 2 TXD
> 6 RTS 5 CTS
> 7 (Not connected)
> 8 CTS 4 RTS
>
>
> NeXT Null-Modem Cable (MiniDIN-8 to MiniDIN-8)
>
> The following table describes the configuration of a null-modem style
> cable used to connect two 68040-based NeXT computers. This
> configuration supports RTS/CTS hardware flow control.
>
> MiniDIN-8 MiniDIN-8
> Pin Signal Pin Signal
> 1 DTR 2 DCD
> 2 DCD 1 DTR
> 3 TXD 5 RXD
> 4 GND 4 GND
> 5 RXD 3 TXD
> 6 RTS 8 CTS
> 7 (Not connected)
> 8 CTS 6 RTS
>
> NeXT Null-Modem Cable (DTR Flow Control)
>
> The following table describes the configuration of a null-modem cable
> used to connect a NeXT computer to a printer that only supports DTR
> hardware flow control, rather than RTS/CTS hardware flow control.
>
> MiniDIN-8 RS-232
> Pin Signal Pin Signal
> 1 DTR 8 DCD
> 2 DCD 5 CTS
> 3 TXD 3 RXD
> 4 GND 7 GND
> 5 RXD 2 TXD
> 6 RTS 20 DTR
> 7 (Not connected)
> 8 CTS 4 RTS
>
>
 Good stuff

> Heck of a time to ask, but NeXTs are on-topic now right? Right? I
> hope? The copyright on the back of my box says (c)1989.
> - Mark
>
 Most have agreed that the Next IS a classic

ciao larry.



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Received on Tue Oct 10 2000 - 01:24:10 BST