Hi Jose.
>>> I've been looking into designing a new SCC card for packet and
>>> making the PCB masks freely available on the 'net. I've
>>> currently got a USCC and a S5SCC card and I've had a good look
>>> at how each of them work. I feel that a PCI based card is beyond
>>> my capabilities so I'm talking ISA!
>> As long as it's possible to select ANY interrupt line, rather than
>> being limited to the low interrupts as so many designs are, ISA
>> only is fine from my point of view. I have a BayCom USCC card
>> here, and it's useless because of its insistance on using either
>> IRQ5 or IRQ7 as both are already occupied!!!
> Same here. Nevertheless I would say it should include IRQ 3, 4,
> 5, 7, 9, 10, 11, 12, and 15. Maybe 14 too, but I believe we all
> use 14 for the first I/O card, unless there be some diskless
> PC's as ham communications servers....
Having just read through the various threads that followed the initial
missive, I will make the following comments:
1. Some hams (like me) use an old 386 as the actual ham radio
controller with all the TNC's and the like in it, and these
computers usually only have ISA expansion slots, so anything
other than an ISA card would be useless.
2. Other hams only own modern P2's with PCI-only expansion
slots, and for them, anything other than a PCI card would
be useless.
3. In my experience, ISA Plug & Pray only cards are a nightmare
to set up under Linux, but PCI Plug & Play cards are normally
the simplest to set up.
4. Because of (3), I would prefer ISA cards to be jumperable for
both address base and IRQ, with IRQ's 2/9, 3, 4, 5, 7, 10, 11,
12 and 15 selectable. However, I would prefer PCI cards to be
Plug & Play ones that can simply be plugged in and have the
BIOS automatically select valid settings.
Best wishes from Riley.
+----------------------------------------------------------------------+
| There is something frustrating about the quality and speed of Linux |
| development, ie., the quality is too high and the speed is too high, |
| in other words, I can implement this XXXX feature, but I bet someone |
| else has already done so and is just about to release their patch. |
+----------------------------------------------------------------------+
* ftp://ftp.MemAlpha.cx/pub/rhw/Linux
* http://www.MemAlpha.cx/kernel.versions.html
