Date   : Sat, 30 Jul 2011 23:50:35 +0200
From   : rick@... (Rick Murray)
Subject: Operational Dial-Up BBS systems? Are there still

On 30/07/2011 11:51, Mark Usher wrote:

> They have...

Thanks, useful!


[quoting Theo here]
> I'm not 100% sure that /NETINT should go to /FIQ rather than /IRQ - perhaps
> someone who knows Econet can say whether it uses IRQs or FIQs.

ISTR Econet uses FIQs. Possibly less of an issue on a RiscPC than an 
A310, but then if the module sets up FIQ code... ;-)

Mmm, http://www.heyrick.co.uk/econet/rosource/background.html suggests 
both are used. I'll need to dig up a schematic and see what !NETINT is 
actually wired to, but I'm pretty sure it is !FIQ.


> - the OS won't be able to detect if there's a podule there.

;-)


> Better is to connect /ADLC to (/PS OR (NOT LA13)) so it appears in the top
> half of the podule's address space (podule_base+&2000), away from the podule
> status word at podule_base+0.  LA13 is pin a4.

How should the podule status word be handled? A simple logic gate to be 
activated when we aren't talking to the ADLC to pass on the byte value 
for "Simple Podule"?

> The podule should be addressed in IOC/IOMD synchronous space:
> Podule slot   podule_base
> 0             033C0000
> 1             033C4000
[etc]

I see, you're just going to bash the hardware directly. ;-)


> The Risc PC Econet module (extract it from (IIRC) RO3.7) is hardcoded to
> talk to the Netslot Econet card which lives at netslot_base=&0303B000.

There's a version at !System.Modules.Network.Net (v6.18) which appears 
to have the SWI Econet_HardwareAddresses ?


> All this is completely untested.

...in Usenet tradition. ;-)


Best wishes,

Rick.

-- 
Rick Murray, eeePC901 & ADSL WiFI'd into it, all ETLAs!
BBC B: DNFS, 2 x 5.25" floppies, EPROM prog, Acorn TTX
E01S FileStore, A3000/A5000/RiscPC/various PCs/blahblah...