[Freemint-list] slip.xif?

[David Henderson]

Hi Alan,

OK, thanks, so it’s not just the SLIP side of the XIF that’s the problem. Sounds like that’s a bit further than I’m ready to go for what was, at the end of the day, a bit of a kite fly.

Ethernnec was only pulling down about 250kbps on a good day and I thought I might be able to squeeze similar capability out of the SCC chip. Adam has pointed out the SCC suffers the same lack of buffering as the ROM port so that figure is a pipe dream anyway. Probably not worth pursuing in that case.

Now it has to be said, putting the serial stuff on the back burner and simply firing up with 1.19 instead of 1.18 has made a substantial difference. I’m now getting twice the throughput on the Ethernec (about half a meg), so I might have a look into building up a netUSBee variant instead as I rather like its smaller footprint.

Thanks nonetheless!

-- 
David.





> From: Alan Hourihane <alanh at fairlite.co.uk>
> Subject: Re: [Freemint-list] slip.xif?
> Date: 30 May 2017 at 08:33:00 BST
> To: freemint-list at mail.atariforge.org
> 
> 
> On 29/05/17 23:52, Miro Kropáček wrote:
>> Hi David and welcome! :)
>> 
>> I’m a professional programmer and long-term Falcon owner who’s trying to get his old machine up and running again after almost 20 years in the cupboard.
>> That's a noble idea, I'll try to help you out. ;)
>> 
>> I’ve been researching building a serial (hardware) module to replace the ageing (and pretty poorly performing) ethernec system. Looking at the specs, the SCC chip ought to be able to do a similar job speed-wise. I thought I’d do a few experiments with SLIP and PPP under MiNT, talking to a Raspberry Pi initially.
>> Before jumping into the SLIP topic, I must mention this: https://joy.sophics.cz/parcp/parcp-usb.html ... trust me, you wont be willing to go back once tried. ;)
>> 
>> Googling popped up a message from 2013 suggesting slip.xif was going to be pulled, but the wiki page seems to have been updated in January this year (this is the one that recommends HSModem) and I can see a ppp.c and slip.c amongst the source.
>> Can you provide an url to this wiki page?
>> 
>> 1. Is slip.xif deprecated?
>> More or less, yes. It was disabled by this commit: https://github.com/freemint/freemint/commit/25294f68ed58fe2a4a73529a6017839bcbeb1d20, making this: http://sparemint.org/mailinglist/Mailing-Lists/MiNT-List.201312/52B98506.4060501@fairlite.co.uk.text possible. In that or some nearby thread it has been mentioned in favour of PPP.
> 
> serial.c uses O_GLOBAL, so the serial driver needs fixing as it's still relying on the old behaviour.
> 
> I'd love to know why the EtherNEC is underperforming for you, that's sent you down this path though.
> 
> Alan.
> 
> 
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