🚀 go-pugleaf

With  regard to everyone's desire to get the  fastest  connections 
possible  with  AtariNOS,  I would like to  gather  together  your 
recommendations for settings used within AtariNOS,  and also  what 
other software you use eg - HSModem, MODEM.CPX, FPATCH2.PRG, along
with the details of the hardware you are using - ie ST, TT, Falcon 
- stating which version of TOS you are using - or whether you  use 
an alternative operating system.

Hopefully then,  a f.a.q. could be drawn up to help others get the 
best from their set-ups.

Of course, if this exists already, stop me now and let me know!

Anyway, to start the ball rolling - my details:

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Falcon030 4MB running TOS v4.04 (no other operating systems  used) 
with  the  following auto folder programs used -  FPATCH2.PRG  and 
HSModem6   (DRVIN.PRG  and  SCC.PRG  set  up  with  the   settings 
recommended  by  Atari  World magazine Oct95  edition  and  listed 
below).

Using AtariNOS v.42 compiled for 68030 code

SupraFAX v32bis/v4sbis Modem set up according to Modem.txt  f.a.q. 
(to be found at ftp://ftp.demon.doc/pub/demon/doc/Modem.txt)  with 
the addition of at&s37=11n (force connect rate at 14.4k)

With the following settings I get speeds in the region of 2,500cps 
for news and text, with 1,900 to 2,100cps on binaries

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MODEM.CPX is set to 134 baud (HSModem re-maps 134 to 57,600  baud) 
and CTS/RTS set as flow control

SCC.PRG is set as follows (with the SETTER.PRG)

     M2TT      U
     M1EMU     U
     LANBIT    N
     LANEXT    N
     LAN_S2    U
     DTRM2     Y     -- Enable modem2 port
     DTRS2     Y     -- Enable serial2 port
     RBLM2     16384 -- modem2 receive buffer
     TBLM2     8192  -- modem2 transmit buffer
     RBLS2     16
     TBLS2     16

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AtariNOS set-up:

Dial text:

NOTE - abbreviated to show changed lines

wait 60000 "ocol:" 
wait 1000 
send "ppp mru=576 idle=300\r"
wait 60000 "HELLO"
wait 1000
status up

Notes:

'mru=576' on the send line refers to the fact that data is sent in 
small  packet  on  the 'net - but if  data  gets  corrupted,  some 
packets  have to be resent - according to Demons  f.a.q.,  576  is 
_their_ optimal size. This is explained in the Tuning.faq which is
available  at  ftp://ftp.demon.co.uk/pub/ka9q/doc/Tuning.faq  (?), 
and also corresponds to the settings in STARTUP.NOS (shown later).

'idle=300'  means the time you have before Demon  disconnects  you 
for doing nothing! A saftey feature if you like (about 3-5 mins)

'status  up'  is  added to make sure that  Demons  newer  hardware 
responds properly.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

STARTUP.NOS file: 

NOTE - only the lines I have had to change are shown:

# Attach the SLIP driver to the serial port 
#      if  port 0 slip dev buff mru  baud
#      --- ---- - ---- --- ---- ---  ----
attach asy MOD2 0 ppp sl0 32767 576 134 

#          ^^^^ This uses modem2 port on the Falcon
#                               ^^^ see Tuning.faq
#                                   ^^^ equivalent to 57,600
#                                   as remapped by HSModem6 

# how many hops before a packet is discarded (Time To Live)
ip ttl 64

# tcp parameters can be tuned. 
tcp mss 536

#       ^^^ Must be set in conjunction with mru - see Tuning.faq

tcp window 32000
tcp irtt 3000
tcp syn on

ppp sl0 lcp local mru 576
ppp sl0 lcp remote mru 576

# see previous comment ^^^

ppp sl0 lcp local accm 0x000a0000
ppp sl0 lcp local pfc on
ppp sl0 lcp local acfc on
ppp sl0 ipcp local compress tcp 16 1 
ppp sl0 lcp open active
ppp sl0 ipcp open active
ppp sl0 idle 600 exit

nntp batch on 24
nntp safety off

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What does this all result in for my set-up:

When  on-line,  the computer to modem rate is 57,600 baud and  the 
modem  to  remote  modem connection is  14,400  baud  with  v42bis 
compression and LAPM correction.

This gives me a top line of about 2,500 cps on text and news, with 
around 1,900 to 2,100 on binaries.

Naturally it does depend on the time of day or night and hence the 
load on the news servers.

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I hope this is not seen as a troll, as it is a genuine interest to 
help others to get the best their system can provide. Hence I look 
forward for your comments and recommendations.

Regards,
Andrew

-- 
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Andrew Wood
54 Ely Street, CV37 6LN, UK
awood@f030.demon.co.uk
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