Re: Dropping chars on 16550

2000-12-16 Thread Chad Schwartz
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

Re: Dropping chars on 16550

2000-12-16 Thread Chad Schwartz
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

Re: Dropping chars on 16550

2000-12-16 Thread Alan Cox
> 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 ;) - To unsubscribe from this list: send the line "unsubscribe lin

Re: Dropping chars on 16550

2000-12-16 Thread Tom Vier
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

Re: Dropping chars on 16550

2000-12-14 Thread Igmar Palsenberg
> 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

Re: Dropping chars on 16550

2000-12-14 Thread Chad Schwartz
> > 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

Re: Dropping chars on 16550

2000-12-14 Thread Igmar Palsenberg
> 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

Re: Dropping chars on 16550

2000-12-13 Thread Chad Schwartz
> > 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

Re: Dropping chars on 16550

2000-12-12 Thread Igmar Palsenberg
> > 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

Re: Dropping chars on 16550

2000-12-10 Thread Chad Schwartz
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.)

Re: Dropping chars on 16550

2000-12-10 Thread Mark Orr
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

Re: Dropping chars on 16550

2000-12-10 Thread Jens Axboe
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

Re: Dropping chars on 16550

2000-12-10 Thread Igmar Palsenberg
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

Dropping chars on 16550

2000-12-10 Thread clock
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.