The master box says 350C on the outside, but when I went to pack some, they
are actually 250C.
So I have new and used 250C, and used 350C
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
(830)792-3400 phone (830)792-3404 fax
AOL IM elcpls
_____
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.3343 / Virus Database: 3184/6348 - Release Date: 05/22/13
Hi, All,
I'm cleaning up some older stuff and I have a couple of external Mac
drives back from when I used to use them on a regular basis. I have a
400K M0130 shell (the drive died long ago and the external cable
disappeared after loaning it out nearly as long ago) and I have a few
of "beige" and "platinum" drives.
Right here and now, I have an M0131 in front of me. Google tells me
that it's 800K drive for Mac only (not Apple II), and that if I want
to use it with an old Mac, it has to be one with either the newer ROMs
(i.e., not a 128K or 512K) _or_ I have to run the ancient HD20 HFS
background task (which only works with the 512K, presumably due to
memory usage). I get why I'd need a ROM extension to use it to
read/write an HFS disk, but why would this drive not work with an
unexpanded 128K or 512K Mac as a single-sided 400K MFS drive? I know
Amigas have an "IDENT" feature so that the machine can wiggle some of
the control lines and get back if the drive is 3.5" or 5.25". Did
Apple do something like that?
Ultimately, I just want to have an external drive on the 128K Mac I
have sitting right here. I'd _love_ to have an original working M0130
but I don't need to buy one if I can use something already have here.
Does anyone know technical reasons why the M0131 is different from the
M0130 besides the different mech (slim-line 2 heads vs full-height 1
head)?
I have a memory that the external cable is different by one pin (head
select? head data?) but it's a fuzzy memory. Might it be possible to
"cut" the pin (via an adapter, not with clippers!) to make an 800K
drive appear and act like a 400K drive to a Original-ROM Mac?
Thanks for any input and pointers. All I've turned up is that they
are different and that the M0131 works with a 512K (with software) or
512Ke (new ROMs) natively.
If anyone happens to have cheap guts for an M0130, I have a shell I
wouldn't mine repopulating. The aluminum RF shield is also long gone,
but that can be approximated.
Thanks,
-ethan
OK, long shot here, but I figured someone here might actually have the
old (1999) KIP 2900 series scanner/printer and as such may be able to
help me get a copy of the Eprom upgrade so I can scan and save files to
an XP based machine.
The scanner is model 2012, and it currently has version 49102 (U225)
Eprom code on the CPU module - I'm looking for something if at all
available.
You see, (there is a computer here) it is an obsolete machine, and
perhaps not a classic - still someone may be using one of these wide
format scanners (up to 36" wide by 56 feet!) and can help.
Thanks,
John :-#)#
This might be a silly question...
Since the specs of the MGT +D disk interface are now out there in the
public domain...
http://www.worldofspectrum.org/NotThePlusD/
... but 720kB 3?" floppy drives are getting rather scarce, I was
wondering... would it be viable to build a version that supported
1.4MB "HD" drives? I realise this would mean a different FDC chip, but
are there other implications apart from tweaking the DOS?
I know few 8-bits supported HD disks, but I don't really understand
why. My electronics knowledge is poor. (Cue Tony Duell.)
I am guessing that an 8-bit would struggled to read/write data fast
enough to keep an HD diskette controller supplied with data, but I was
wondering if that could be overcome with interlacing or adding some
cache RAM?
This is probably a completely pointless exercise - people seem more
interested in using CF or SD media these days, but I enjoy the
nostalgic element of actual floppy diskettes.
--
Liam Proven ? Profile: http://lproven.livejournal.com/profile
Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven
MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven
Tel: +44 20-8685-0498 ? Cell: +44 7939-087884
My first "computer" was not really a computer per se, but was a learning
machine made by Welch Allen Scientific.
It consisted of a video display that you would wind a filmstrip through,
with 5 buttons labeled A-E below the screen.
The filmstrip presented a subject (mine was Algebra), giving basic
background info and instructions for 3-5 screens.
After the intro, you were given a problem to work out, with 5
multiple-choice answers at the bottom.
If you pressed the correct button, it took you to the next section.
If you pressed the wrong button, it knew which thought process you had
gotten wrong, and took you back to that set of instructions again.
The second set of questions was different than the first set, if you missed
the first one.
It was a great learning tool, and one I have never seen repeated in ANY
Algebra program I have tried since!
None of them now seem to know WHY you missed the problem, which this early
system did understand.
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
(830)792-3400 phone (830)792-3404 fax
AOL IM elcpls
_____
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.3343 / Virus Database: 3162/6347 - Release Date: 05/22/13
Hi all,
I have a two-port SLU for QBUS which appears to be a third-party, two-port
version of the normal DLV11J. I'm having trouble coming up with documents
describing the CSR and vector switch settings; there is a 12-switch block
and a 10-switch one. It doesn't seem to correlate with the Sigma DLV11J
clone I have (for which I have docs) which has DIP switches instead of
jumpers for the settings.
If anyone has docs for this board, I'm interested. Otherwise, I can
reverse engineer it (it's only 2 layers and uses nothing but bog-standard
parts).
- Dave
More Stuff going up tonite at about 8pm. All with Buy-t-now for instant
gratification.
VAX VLC
IS68K Qbus CPU
Volker Craig VC404
I'll also be putting up some more stuff later this week:
old Unibus expansion chassis, backplane and Power supplie(s) (former
"project" I'll never get around to)
DEC PDP 11/23+ w esdi controller and disks
so keep watching
http://www.ebay.com/sch/tcp1022/m.html?item=251277989792&ssPageName=STRK%3A…
As always, mention you are a list member and I usually throw in some good
stuff as a bonus.
And thanks to all on this board who been buying my stuff, much appreciated.
Hello everybody,
a few days ago I introduced my USB to Omnibus adapter module. I'd like give you
an update.
As you might have seen on pdp8.hachti.de?gallery/omnibus_usb the board I made
first was only half height and used three CoolRunner II CPLDs.
I made a slight redesign of the board:
- Full size Omnibus board. One could even mount DEC handles if he wanted to.
- CPLD is now one big XC9572XL-TQ100.
- Added working DIP switches, TX and RX device code are freely selectable.
The board still uses the 7438 as bus drivers. And YES - I still use the "wrong"
drivers. As Plessey did on their RK05 controller... And that controller is said
to be more reliable than the original RK8E. So 7438 cannot be the worst choice.
So please no more discussion about that.
I'm very sorry that I just don't have a really loaded PDP8/e at hand to test the
board. But I tried my best and loaded the test system with some hardware which
was just at hand:
- Front panel
- Two backplanes in system
- CPU + EAE
- M837 memory extension and time share
- KL8J terminal at 03/04 and 9600 baud
- 24K core memory (3x8)
- RK8E
- TD8E
- MI8-EA bootstrap diode board
- Bus loads
- OMNI-USB :-)
That makes 24 boards in the system. Without the core memory boards which don't
use anything than ground it's still 21. There are 13 slots left.
The sytem is running OS/8 while I'm writing this. It just works.
Booting works, transferring data over USB works, TD8E worked (until the TU56's
PSU broke down a few minutes ago :-), RK8E works, terminal works. Looks good.
Oh, kermit runs so fast...!
I have decided to make a 25 piece batch of the new board. A prototype without
gold fingers (it will have gold fingers in the end) can also be seen in my new
webshop: http://shop.hachti.de
Price is EUR 105 without any tax and any shipping. Shop initially displays EUR
125 incl. German VAT.
Shipping of the boards will be in the beginning of April. April 2nd seems to be
a bit too optimistic due to PCB manufacturing time. But I'm quite condident that
it will be in the first week of April.
You can already order/pay now. I very much appreciate that because it helps me
to pay the boards and parts. The other effect is that I'd get a real resonance.
Currently a handful of people told me that they want 15 boards. Some of them
already ordered (big THANK YOU!), some are very quiet.
Kind regards
Philipp
--
Dipl.-Inf. (FH) Philipp Hachtmann
Buchdruck, Bleisatz, Spezialit?ten
Alemannstr. 21, D-30165 Hannover
Tel. 0511/3522222, Mobil 0171/2632239
Fax. 0511/3500439
hachti at hachti.de
www.tiegeldruck.de
UStdID DE 202668329
My PDP11/05 has a faulty control board - M7261. The deposit function doesn't work. I've traced it back, and I'm pretty sure it's a fault in one of the microcode PROMs. While I'm sure this is fixable, I would like to see this machine do something else, so I figure I'd check if anyone happens to have a spare board before I spend many more hours trying to fix this.
-Ian
I just talked to one of my recyclers in WI; they destroyed all their
"monster machines" last month, including 6' DEC cabinets, Cray servers, Big
Blue IBM cabinets, etc. He promises he will save them in the future, IF I
can promise that someone will take them for more than scrap value.
So, if you can take LARGE old servers from WI, please let me know. They
will palletize properly for shipping. R2 certified recycler, so these must
stay in US, and there will be paperwork to be filled out, since these will
be sold untested.
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
(830)792-3400 phone (830)792-3404 fax
AOL IM elcpls
_____
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.3343 / Virus Database: 3162/6341 - Release Date: 05/20/13
