Re: Toll Booth and junk (was Re(fcc): TI-H: Radio/In...)
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Re: Toll Booth and junk (was Re(fcc): TI-H: Radio/In...)
Speed over the par port is mostly the bottleneck that windows creates. If i
was going to do this under Linux, i'd write it as a loadable kernel module,
and talk to grant's AVR as fast as it'll receive the data. unfortunately,
windows bottlenecks things a bit, and i don't want people to have to modify
their configuration to use it. also, wouldn't that disable using a printer
on the same port without first re-enabling it? seems like a bit of an
annoyance to me (unless you mean just stopped in Parallel Service, in which
case i could have the program do it internally...i know very little about
the internals of NT port handling as of yet)
-- Jon Olson
-----Original Message-----
From: David Knaack <dknaack@hotmail.com>
To: ti-hardware@lists.ticalc.org <ti-hardware@lists.ticalc.org>
Date: Thursday, November 05, 1998 1:52 PM
Subject: Re: Toll Booth and junk (was Re(fcc): TI-H: Radio/In...)
>
>>From: "Jon Olson" <morph@jmss.com>
>>I said as a start, those of us in windows nt need SOME kind of
>interface for
>>transfering things, and i'm sorry to say, but dos programs or even 95
>>programs simply won't work. try running a dos or windoes ti transfer
>program
>>in nt, you'll get a nice ERROR_ACCESS_DENIED return from the inp's and
>>outp's that the program uses.
>
>As I pointed out in another post, you should try removing the port
>from NTs configuration. NT doesn't protect resources it doesn't
>know about.
>
>My incomplete TI-85 link program (supporting the serial port)
>uses the Win32 API for serial access, and so will work on
>NT (if it was finished anyway:)
>
> Sure, it's slow, but i've been reading up on
>>port I/O in NT, and it looks like parallel is fairly easy (115200 over
>>serial would be about 1/4 of the speed that you could get through
>>parallel...maybe less)
>
>EPP or ECP parallel ports will run up to ISA bus speeds, about
>1 meg per second, assuming your software can handle it.
>8 bit bidirectional ports will run up to about 300Kbps, and
>4 bit bidirectional ports will run up to about 60Kbps (or
>140 with some design tricks).
>
>DK
>
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