Multi-Tech ISI card

Multi-Tech ISI card

[Dave]

this sounds like the hayes esp cards, which can emulate 16550, but also have
a mode which enables a 1k fifo (1k for each of the two ports).  i have some
information on the cards if anyone is interested.  if memory serves (the
documentation is at home) the cards can also do dma.

Multi-Tech ISI card

[Borja]

> 
> we have two of these cards and they've never been out of the box,
> i believe they are just 16550's strapped to come up in a suitable mode
> (but i could be wrong).
> we run the plain old 16550's on our pc's at 115200 with high-speed
> compressing modems (motorola) without trouble, you don't need the isi
> card unless you need com3.
> we have, however, had trouble with the multitech mt2834 modems when trying
> to use them over a 4-wire leased line. we'd be interested in anyone
> else's experience.

	Multi-Tech say that the cards are 16550-compatible by default
but they can be put in a mode with a bigger buffer to decrease the
interrupt load. I will look at the specifications they are going to give me.

	BTW, my COM3 card is an old 8250-based card with the 8250 desoldered
and replaced by a 16550, and a track cut and resoldered to use IRQ5.
It works under Unix (and will work under Plan 9 once I get the new
motherboard).

	The reason for the ISI card is that I use to do heavy work while
I use the modem and for now I cannot set up separate file server, CPU server/s
and terminal, so I will use a single machine.

	regarding the modems, I haven't experience with that model
(just biught the cheap 2834ZDX which is async-only and PSTN-only) but
perhaps I can help you. Which is the problem?


	Borja.


-- 
*******************************************************************
Borja Marcos               | Preferred: borjam@we.lc.ehu.es
Alangoeta, 11, 1. izq.     | Others:    borjamar@mx.sarenet.es
48990 - Algorta (Vizcaya)  |            100015.3502@compuserve.com
SPAIN                      | CIS:       100015,3502
******************************************************************
(c)1995 by the author.
This message cannot be transferred to the Microsoft(tm) Network.

Multi-Tech ISI card

[jmk]

we have two of these cards and they've never been out of the box,
i believe they are just 16550's strapped to come up in a suitable mode
(but i could be wrong).
we run the plain old 16550's on our pc's at 115200 with high-speed
compressing modems (motorola) without trouble, you don't need the isi
card unless you need com3.
we have, however, had trouble with the multitech mt2834 modems when trying
to use them over a 4-wire leased line. we'd be interested in anyone
else's experience.

Multi-Tech ISI card

[Borja]

	Hello,

	I'm talking to Multi-Tech to get information about the
ISI card (a serial card capable of much higher throughputs
than a 16550) to write a driver. Is else doing it, is, am I
reinventing the wheel?

	Borja.
-- 
*******************************************************************
Borja Marcos               | Preferred: borjam@we.lc.ehu.es
Alangoeta, 11, 1. izq.     | Others:    borjamar@mx.sarenet.es
48990 - Algorta (Vizcaya)  |            100015.3502@compuserve.com
SPAIN                      | CIS:       100015,3502
******************************************************************
(c)1995 by the author.
This message cannot be transferred to the Microsoft(tm) Network.