5 Jul
2005
5 Jul
'05
12:13 p.m.
On Tue, 2005-07-05 at 01:09 +0100, Tony Duell wrote:
Yep, could do - plus I've got the schematics for the Torch one
somewhere. Just wanted to check that there wasn't anything funny about
IIRC Torch made a SCSI controller for the Beeb, it was used with a ROM
called SCISFS. If you've found one of those you're very lucky, I am told
that fewer than 100 were made.
Not me
yet... more interested in their SASI controller at this stage to
be honest as I really need a way of getting the 380Z fileserver backed
up!
What about hacking around with the Acorn SASI controller, e.g. the one in
your ACW? I assume you have schematics, etc for that. the RML one (there shouldn't be) - SASI should be
SASI no matter what.
IIRC the RML hard disk unit used a standard ST506-interfaced drive and a
standard bridgeboard to SASI (Xebec?) In which case the host adapter is
going to be pretty normal too.
[PROMS]
I'll send you a uuencoded tar.gz file of the ones in my machine (CPU, RAM
expansion, 40 column video, hi-res). May be a start.
Brilliant - ta muchly for that. I'll see if I can work my programmer out
and read the others that I have... From what I remember there are no PROMs on the standard
(non-intellegent)
disk controller or on the PIO card that I have somewhere. The
latter is a
board with an address decoder, 3 Z80-PIOs and a Z80-CTC on it, along with
a wire-wrap area. I don't have schematics, but it would be trivial to
work out.
"COS
checks to see if there is a VDU plugged into the SIO-4 socket. If
What does it look for? One of the handshake lines being asseted? Personally,
I'd try to use the RML's video card for everything, which
means kludging up a keyboard. It can't be that hard, the interface is as
simple as it gets.
Yep, true. I'll have to have a look inside one of the Cifer keyboards
sometime as they look the part - maybe one of those can be hooked up via
an interface...