absolutely, they are.
They don't follow the same archaic I/O register mechanism, either. which
is *GOOD*.
(Just take a peak at the 16C854 sometime. You'll understand exactly how
archaic it can GET.)
Chad
> > macs and sun machines use z85c30 chips, so there are some non-16550 boxes
> > out ther
heh. yep.
Thats why I didn't list them.
z85's are good chips, but they perform JUST LIKE a 16550.
Chad
> On Thu, Dec 14, 2000 at 08:51:42AM -0600, Chad Schwartz wrote:
> > And what kind of serial ports do you find on your Alpha? 16550's! Your
> > PowerPC? 16550's! Your PA-RISC box? 16550's
> macs and sun machines use z85c30 chips, so there are some non-16550 boxes
> out there.
SGI kit also tends to use Z85Cx30 based devices. Its unfortunate the 16xx0
series serial controllers won as the Z85Cx30 is much more flexible ;)
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On Thu, Dec 14, 2000 at 08:51:42AM -0600, Chad Schwartz wrote:
> And what kind of serial ports do you find on your Alpha? 16550's! Your
> PowerPC? 16550's! Your PA-RISC box? 16550's! Hey! Even RS/6000's use
> 16550's!
macs and sun machines use z85c30 chips, so there are some non-16550 boxes
> Yeah. most of this crap is manufactured as all-in-1 chips. (IDE, FDC, SER,
> PAR, etc.) and right along with that, you get 2 16550AFN's. Now. they
> hyped the heck out of 16550's when they came out, because "You can use
> your 28.8kbps modem without overruns!". Yeah. clocking it at 38400 or
> 5
> > This is where a 654 or an 854 (I'm only listing startech design chips.
> > there are others that would do the job.) come in handy. They can pause
> > their transmitter WITH bytes in their fifo. (Automated hardware/software
> > flow control.)
>
> Indeed. Most chips I've seen are 1 16550, or pr
> there are many situations in which a 16550 is KNOWN to be overrunable, all
> of which can occur in your common PPP connection.
>
> More importantly - if you have 2 16550's talking together (Which is
> EXACTLY what you have, when you hook it to a modem) there are even MORE
> overrun possibiliti
> > Heh...do what I did. Go on eBay and pick up a Hayes ESP card.
>
> Hmm.. High speed comm is fine here, as long is I use handshaking. If I
> don't, I'll loose chars.
there are many situations in which a 16550 is KNOWN to be overrunable, all
of which can occur in your common PPP connection.
Mo
> > Use handshaking
>
> Heh...do what I did. Go on eBay and pick up a Hayes ESP card.
Hmm.. High speed comm is fine here, as long is I use handshaking. If I
don't, I'll loose chars.
> I have a fairly weak system by todays standards, and I found that
> even with a 16550 serial port, I'd get tc
You'll find that there is a problem with 2.2.12, on down - with losing a
few bytes here and there.
The bug is in the tty subsystem - in that when you pass off chars to the
ldisc - from the driver, the ldisc doesn't actually write them. (I could
get into the details, but you probably don't care.)
On 11-Dec-2000 Igmar Palsenberg wrote:
> On Sun, 10 Dec 2000 [EMAIL PROTECTED] wrote:
>
>> Hi folks
>>
>> What should I do, when I run cdda2wav | gogo (riping CD from a ATAPI
>> CD thru mp3 encoder) and get a continuous dropping of characters, on a
>> 16550-
>> enhanced serial port, without han
On Sun, Dec 10 2000, [EMAIL PROTECTED] wrote:
> Hi folks
>
> What should I do, when I run cdda2wav | gogo (riping CD from a ATAPI
> CD thru mp3 encoder) and get a continuous dropping of characters, on a 16550-
> enhanced serial port, without handshake, with full-duplex load of 115200 bps?
> About
On Sun, 10 Dec 2000 [EMAIL PROTECTED] wrote:
> Hi folks
>
> What should I do, when I run cdda2wav | gogo (riping CD from a ATAPI
> CD thru mp3 encoder) and get a continuous dropping of characters, on a 16550-
> enhanced serial port, without handshake, with full-duplex load of 115200 bps?
> About
Hi folks
What should I do, when I run cdda2wav | gogo (riping CD from a ATAPI
CD thru mp3 encoder) and get a continuous dropping of characters, on a 16550-
enhanced serial port, without handshake, with full-duplex load of 115200 bps?
About 1 of 320 bytes is miscommunicated.
The kernel is 2.2.12.
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