>Sony RS232, Sunrise RS232, they can all reach 115k2. I think AccNet can
too.
>It's not about the hardware, it's the software which limits the speed on
>those. Erix can reach those speeds, other terminal-programs can't (afaik).
This is not true...
The Sony RS232C can do all normal speeds until 19200 baud, but 38400 baud is
not possible. With a little trick you can do 57600 baud.
The problem is with the baud rate generator.
1.8432 Mhz / 2 / 16 = 57600
1.8432 Mhz / 6 / 16 = 19200
The first number is the oscilator frequency, the second number the clock
divisor, and
the last one is an internal divisor, required to be able to synchronise with
the serial
stream. (can be set to one, then you can send data at a very high rate, only
receiving
isn't possible in the ansynchrone mode)
Since the duty cycle of the clock signal to the 8251 has to be 50% an odd
number for
the clock divisor is not allowed.
But what I try to tell with this nonsense is that the capabilities of a
RS232C interface
are not only limited by the software. The hardware is one of the biggest
problems.
Greetings from Erik Maas
p.s. If I have time, I could finish the V9938 colour ANSI version, it was at
a reasonable
stage. (fast enough with some dirty tricks)
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