Re: 2.4 amiserial

[Michel <da...@re...>]

Jouko Pynn=F6nen wrote:
>=20
> Michel wrote:
>=20
> >Frank Petzold wrote:
> >
> >> On 2.2.10, the MFC driver hangs and no bytes get through after a whi=
le
> >> (especially if Netscape is started). In 2.3 using amiserial, I D/L`d=
 some
> >> files, browsed with netscape and ran a find / ... at the same time. =
The
> >> modem (56k) was hanging on the internal serial. There were only some
> >> packets lost, but the connection stayed up. After I quit the find, t=
he
> >> packet loss was gone immediately.
> >
> >That sounds very very good.
>=20
> It still doesn't work on 603e. When establishing PPP, the first modem
> command usually goes ok but it fails to receive the OK string after the
> second modem command (AT&D0). Typing AT commands with "cu" or similar
> even at 9600 bps reveals the same thing, it usually losts characters af=
ter
> a few successful commands. Any ideas where to look for the reason, IDE =
or
> serial code? 2.2.x works ok.
>=20
> Btw, what's the reason for the IDE - serial interference? I tried OpenB=
SD
> (m68k only) and did find / while having a download going in 57600bps. A=
t
> least judging from the modem leds it didn't even slow down and the pack=
et
> flow was untroubled. It also works in AmigaOS: you can have a download
> going on while cleaning IBrowse's cache or doing other disk access.

I guess AmigaOS is far less complex than Linux...

> Linux more or less stops serial i/o when doing something with the disk.=
 I
> have been told I can't compare these (but i just did ;). Is it due to
> Linux's way of handling interrupts, or PCC<->m68k interaction, or somet=
hing
> else?

The m68k is not involved with Linux/APUS, except maybe for the interrupt
emulation, where I imagine at least part of the problem might be.

Besides, I seem to remember reading something about large parts of the Li=
nux
IDE code running with interrupts off. That might explain why it seems to =
work
much better for my with my 603e using SCSI.


Michel


--=20
Earthling Michel D=E4nzer (MrCooper)  \  CS student and free software ent=
husiast
Debian GNU/Linux (powerpc,i386) user \   member of XFree86 and the DRI pr=
oject