🚀 go-pugleaf

In article <4de2k4$9r@grebble.oau.org>,
Eric Wampner <eww@grebble.oau.org> wrote:

| Well, I agree, getting the device to go faster than 115K is not useful
| if you are using a serial port which can't go faster. My ZyXEL can do
| 400K, still looking for a serial port. :-) (Of course, the ZyXEL has
| a parallel interface, currently useless)

You might find that a parallel port buys you nothing...

Unless you have a buffered parallel port you will have to grab avery
byte with the CPU before the next one comes in, somewhat like using
a 16450 UART. And even with buffering the speed only rises to the
limit of how much CPU you will spend moving bytes.

Ideally a fast serial port would be on a card which delivered the
data to memory via DMA or bus master access, used the full bus width
of (at least) 32 bits, and could be programmed to generate an IRQ
N byte times after the first byte was received.

There's no problem getting data in via serial at high speed,
Ethernet (10mbit), Token Ring (16mbit) and FDDI (100mbit) are all
serial. The idea of using 8 bits at a time instead of one sounds
great, but the truth is that the bottleneck is not from the modem to
the UART, but between the UART and the memory.
--
	-bill davidsen (davidsen@tmr.com)
"Anarchy does not scale well."  -Dave Welch