Given the recent iteration of the recurrent "how will we save our data in N
years" thread, where N is Sufficiently_Large, I discovered this interesting
tool.
http://ollydbg.de/Paperbak/
There is something terribly attractive about this. I'm tempted to play with
it to see how practical it is, after I've ported it to Mac OS X, of course.
--
------------------------------------ personal: http://www.cameronkaiser.com/ --
Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com
-- Wagner's music is better than it sounds. -- Mark Twain ---------------------
Hi folks,
as I already mentioned in alt.sys.pdp8 I'm currently experimenting with a TD8E controller in a
pdp8/e and more than one TU56.
I installed two TU56. The first one has the G888 modules. The second one will be daisy-chained to
the first one.
Currently I tried only the control cable. Forgot to bring the data cable with me. It looks as I now
can access units 0 and 1 on both TU56. I'm quite confident that the data part will work as well.
Currently only one or two of the four transport are working properly (The drives are currently being
repaired) but there's enough functionality for a proof of concept.
The next step will be three modifications:
1. Make the TD8E respond to all four TD8E addresses - This is done easily and non-destructive by
pulling the address select jumpers to ground.
2. Add a latch to the TD8E that will hold the two TD8E address bits and feed them through two former
ground lines of the cable.
3. Add a demuliplexer to the paddle board. Use the original select signal and the two additional
ones to generate 8 select lines.
If I'm right I'll have a TD8E that supports up to 8 tape transports (4 TU56). That would be very
nice for the beginning.
If anybody has already tried this or there's something I've missed, please let me know!
Regards,
Philipp :-)
--
http://www.hachti.de
Picked up an old terminal in very nice cosmetic condition; it works fine
barring a bit of visual "jitter" on the display -- not sure how best to
describe it. The picture is clear and sharp but occasionally a few
scanlines will spike off to the right a bit. Coinciding with this
spiking are tiny crackling noises from inside the monitor. (Or at least
it seems like they coincide, obviously I can't verify this.)
I thought it might be HV leakage based on discussions I've seen on this
list. I've run it with the cover off and the lights off and I can see
no evidence of sparking or other visible discharge.
Any thoughts?
I hate working on CRTs. I'm not great with electronics (getting slowly
better) but I can handle debugging low voltage stuff. Fixing monitors
scares the heck out of me...
- Josh
Hi guys,
Just a quick update regarding the disc reader project. I've added
sync-on-MFM-word to the microcode, and the software MFM decoder is working.
I got the first valid MFM decode using the "soft-PLL" decoder engine
about five minutes ago -- the first 16 bytes of an MS-DOS 5.0 boot
sector. I can see all the sector headers, address marks and pad bytes
displayed on the screen. "Just a bit" more than the PC disc controller
lets you see... :)
Now to find a disc with a slightly less ordinary format... perhaps a BBC
Micro (Acorn DFS) disc? My target is still an Amiga disk, if I can get
my hands on one with known contents.
More to come when I've had some sleep... I'll see if I can get some
photos of the hardware (and maybe schematics) uploaded in the next
couple of days.
Cheers,
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
On 7 Dec 2009 at 21:37, Chuck Guzis wrote:
> My first instinct says "flyback transformer".
Which reminds me, if only I can get the flyback transformer fixed on my old Mac SE I could get it working again! But it's rather specialised I fear :-)
-cheers from Julz @P
Hi all. I got an email from the Computer History Museum (that's the BIG
one in California) ... says they're closing the main exhibit this month,
and it will re-open bigger and better toward the end of next year. So
now's a good time to go visit them before they redesign it.
I'm looking for information on the Excellon CNC-6 controller. I
believe this is a Z8000-based system from the 80's still in fairly
wide use. Mostly, I'm interested in general information regarding
details on the hardware.
If you can offer some illumination, please contact me off-list, if
you feel that this isn't appropriate for discussion (I've not seen
much mention of CNC controllers to date).
Thanks,
Chuck
