On Wed, 22 Nov 2000, Mike Miller wrote:
> I've used QModem Test Drive on a 286 and on this Cyrix that
> most programs think is a 486, without problems. The test drive
> version doesn't support RPI, but that didn't cause any
> problems with an RPI modem on local good quality phone
> connections. Sounds like bad phoneline/modem problems to
> me.
>
>
> On 22 Nov 00, at 0:33, Joan Cameron wrote:
>
> > Qmodem may have been built for a 286 or earlier. It produced a whole lot
> > of screen garbage; but, it's all I had when I purchased my $15 text-only
> > account from the Edmonton Freenet and I used it. Then my brother
> > downloaded a copy of Telix from somewhere and I discovered that turning on
> > the 32 bit crc block-checking feature would eliminate about 90% of the
> > garbage. When trying out old communications software, it's a good idea to
> > know whether it's compatible with your UART chip.
>
Joan
In light of my experience with Telix, I don't see why line-noise would be
the problem. I assumed that this crc block-checking feature provided some
kind of forward compatibility with newer UART chips that the original
Telix had not been built for. Maybe you have a newer version of Qmodem
than I have.
Also, other software showed about 90% less screen garbage on the same
hardware setup. The copy of Bananacom which I now use shows no screen
garbage at all on my 486, but did show some small amount on my 386. This
copy was built in 1994; and therefore I would assume it was built for the
newer 16550 UART chip such as I have in the 486, rather than the 16450 on
my 386.
I'm guessing that the more powerfull UART chips in the 386 and 486 simply
overwhelmed the buffering capacity of the older software.
Joan Cameron
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