31 Oct
2002
31 Oct
'02
1:42 a.m.
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
Most of the I/O connectors are on the bottom...
Okay, *bottom of the unit towards the rear* :>)
So far, so good. I assume you've identified the
mains input as well.
Yeah, that would be pretty hard to miss!
On the bottom are 4 connectors. The 2 neares the back
of the machine are
on the CPU board and consist of the parallel printer port (34 pin,
towards the floppy drive side of the machine) and the I/O expansion bus
(50 pin).
In front of the parallel port is another 34 pin edge connector, which is
part of the floppy controller card. It's for external floppy drives (You
can connect 2 more drives here, I think you set them as DS0 and DS1, and
you need to terminate the last drive on the cable).
In front of the I/O bus is the DB25 RS232 port.
> parallel port as a 34-pin card-edge connector (which I suppose needs a
> Tandy-specific cable to attach to a printer), but the problem is that
there
Yes, but it's an easy cable to make up. It's just a 34 pin edge connector
on one end of a piece of ribbon cable and a 36 pin
Blue Ribbon
('Centronics') plug on the other. Leave pins 18 and 36 on the BLue Ribbon
connector unconnected, match up the pin 1s of the 2
connectors. Then just
crimp the connectors onto the cable -- there are no
twists or swaps to
worry about.
Thanks for the information. I'll be poking around this critter more this
weekend. Any gotchas I should know about?
Later --
Glen
0/0