On Thu, 23 Nov 2000 18:47:12 +0000 (GMT) Tony Duell
<ard_at_p850ug1.demon.co.uk> wrote:
> > Just the pile of boards and a case, as I recall. Taken
> > apart years ago by somebody else. Damn, why can't they
> > leave this stuff in one piece?
>
> A 380Z _is_ a pile of boards and a case :-). Well, OK, there's a PSU and
> maybe a couple of drives as well.
Quite right! My machine is missing the drives, wiring
loom, front panel, card cage and connectors.
> What there isn't is a backplane. The boards slot into card guides screwed
> to the bottom of the case. There are right-angle header plugs on the top
> edges of the boards, into which ribbon cables plug.
Yes, I have the ribbon, but no card guides. There's an
extra ribbon cable between CPU board and VDU, as you
mentioned.
> In particular :
> The PSU plugs into the CPU board (only)
I wondered where that went! Someone's cut the mains wires
and removed the output cables.
> There's a 50 way bus ribbon cable that plugs into all the boards [1]. It
> carries the Z80 bus signals _and the PSU rails). At the far end from the
> CPU board there's a passive terminator
Mine has a passive terminator board which has space for a
UHF modulator, but the parts aren't installed.
> Other connectors are linked to sockets on the back of the case for things
> like serial and user (parallel) ports. And to disk drives, of course.
As for the disk controller, it has a WD FD1771, a Z80 CTC
(Counter-Timer Chip) and an 8251 serial chip. Also the
usual glue logic and some 1488/1489 drivers.
I also have a 16K RAM board which is just a duplicate of
the CPU board with most of the chips left out. The RAMs
are installed, plus a couple of address decoder chips.
--
John Honniball
Email: John.Honniball_at_uwe.ac.uk
University of the West of England
Received on Fri Nov 24 2000 - 06:57:42 GMT