🚀 go-pugleaf

Peter Ceresole <peter@cara.demon.co.uk> wrote:

> In article <1dfxiaj.8q52e8141nvouN@[195.102.194.127]>,
> real-address-in-sig@flur.bltigibbet (Rebecca and Rowland) wrote:
> 
> >> and most Macs these
> >> days can talk to devices on the serial port at 230Kbps,
> >
> >Not `most': all Macs these days can
> 
> I put it badly. I know that all new build Macs can. But because old Macs
> are still very useable, even though slow, I was thinking of people still
> using those. "Most Macs in use these days" is what I meant.

All Macs can talk to stuff on their serial ports at 230400 bit/s (except
for the iMac, of course): it's the speed LocalTalk runs at.  That's
*ALL* of them with no exceptions from the 128K original onwards.  I was
referring to all of them, not just all new ones.  With the right
software, even a 128K Mac can use a serial port at about 500,000 bit/s
(yes, that's right; the data comes from Apple).  Any Mac without at
68000 (or the iMac) can use a serial port at 920000 bit/s; some
PowerMacs can go up to 2Mbit/s.  (this is using an external clock; the
internal serial port clock can only run the port at up to 230400 bit/s)

The thing is that 68000 Macs (for example) can't run a reliable TCP/IP
PPP internet connection and an internet application using a serial port
speed of above 28800 bit/s.  LCIIIs can do the job with a serial port
speed of 115200 bit/s (dunno about 230400 bit/s).  Macs in between are
in between (aside from the blinding IIfx which is quicker than the LCIII
with more efficient serial ports).

The full story is rather long...

Rowland.

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