22 Feb
2016
22 Feb
'16
12:11 a.m.
(replies inline)
On Sun, Feb 21, 2016 at 9:27 AM, tony duell <ard at p850ug1.demon.co.uk> wrote:
Yes and I usually use such; I have an assortment of things from inline
testers to breakout boxes to Tektronic analysers. But this hookup was
so simple and obvious nothing could go wrong.... (!)
Indeed that's how it comes up. Very short pause since I have most of
the memory out as part of potential gotcha elimination - and the last
two tests are memory tests IIRC; they take a little longer.
Well I haven't figured out exactly what the
problem was but I'm
embarrassed to report it was indeed serial comms finger trouble. I
I have found that those little in-line RS232 testers with 7 or so bicolour
LEDs monitoring the important signals are very useful when working on
a machine with a serial terminal. If you get flickering on the TxD or RxD
LEDs then it is sending something. could have
sworn that VT220 was fine and the cable wired correctly...
but to cover all bases I tried it with a USB serial port on the Mac
that sits in the lab.
It worked.
First time.
CONV011
There should be a pause between the 'CONV0' and the '11' IIRC You should then get 2 lines of read errors for DD1 and
DD0 in that
order. If you get a 'Device Error' then the TU58 controller is not
responding at all, either it is not plugged in or it has serious problems.
Yep that was shown in the link I gave. In text it's:
CONV011
?27 READ ERROR DD1
?27 READ ERROR DD0
ROM>^C
?27 READ ERROR DD1
?27 READ ERROR DD0
ROM>
I have 2 genuine 11/730 console tapes. Not that it
does me any good, they
both have dropouts and are shedding oxide. The output of the read amplifier
in the TU58 is 'interesting' shall we say.
I am currently rebulding a standalone TU58. My aim is to somehow find a good
tape (the hard part) and then to dump an 11/730 console tape image to it. That
means writing some kind of program to talk to the TU58 (another hard part).
I did wonder how one might go about writing a tape image to a physical
tape... I'm happy to get the thing loaded via the emulator for now -
but I'd like to get real working tapes eventually.
If it helps your 'hard part' I have at least a couple of brand new
TU58 tapes - still sealed in plastic wrap...
Mike
http://www.corestore.org
'No greater love hath a man than he lay down his life for his brother.
Not for millions, not for glory, not for fame.
For one person, in the dark, where no one will ever know or see.'