Re: [OT] sparc-->mac serial cable
On Tue, Jan 28, 2003 at 09:05:18PM +0100, Frank Gevaerts wrote:
> On Tue, Jan 28, 2003 at 06:12:10PM +0000, Hugh Saunders wrote:
> > Hello, i am attempting to build a serial cable so i can use an old mac
> > laptop [powerbook510] to boot a sun sparc ipc and start it network booting.
> > Google reveals the following pinouts:
> >
> > AppleMac [1]
> > DIN8 Signal Description
> > Pin
> > ----------------------------------
> > 1 RTS Handshake output
> > 2 CTS Handshake input
> > 3 TXD- Transmit data (inverted)
> > 4 SG GND
> > 5 RXD- Receive data (inverted)
> > 6 TXD+ Transmit data
> > 7 DCD General Purpose Input
> > 8 RXD+ Receive data
> >
> > Sparc IPC [2]
> > DIN8 Signal Description
> > Pin
> > ----------------------------------
> > 1 DTR Data Terminal Ready
> > 2 CTS Clear to Send
> > 3 TXD Transmit Data
> > 4 GND Ground
> > 5 RXD Receive Data
> > 6 RTS Request to Send
> > 7 DCD Data Carrier Detect
> > 8 RTXC Receive Clock
> >
> > My first question is: how do i wire it? do i try and match the pins up ie
> > RTS-->RTS or do i cross over as in RTS-->CTS?
> >
> > Next question, whats with TXD[+-] on the mac but only TXD on the sparc? can
> > i just use TXD+ -->TXD? [or TXD+ -->RXD if crossed over] then ignore
> > TXD-?
>
> I would wire TX+->RX, RX+->TX, and GND->GND, and leave the rest
> unconnected at first, and if you really need hardware handshaking,
> RTS<->CTS and CTS<->RTS.
Thanks, i understand up to here...
> IIRC some systems also need DTR and /or DCD to
> be wired high
wired high?
will try with just the three you suggest for now...
thanks,
hugh
ps: sorry if the first table is mashed! got figure what mutt does with
tabs but thats a different issue.
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