>> Just going by what you write...BTW, what are you using as a reference?
> I've used ftp://ftp.seagate.com/acrobat/reference/111-1c.pdf a lot.
> Also other IDE implementations on ATMegas.
Do you mind providing links to any good implementations of IDE on ATMega you know of?
Marc
I used to be an ardent bottom-poster like this list requires, but then I was given one very good reason to switch that I believe is valid and persuasive -- bottom posting (and even inline posting), I understand, is a very royal pain in the arse for people who are visually disabled or challenged and require the use of assistance software.
While this particular list may not have members who fall into this category (me included), in other realms that I frequent I there are readers who have these restrictions. And for them I learned to top post.
I've adapted to top-posting and pretty much every other list I belong to generally works that way. Top-posting makes sense (and can be efficient) when one is following a conversation from the beginning and only needs to quickly find the relevant new additions in each message. But I agree that it is a royal pain in the arse when one jumps into the middle of an on-going thread, as reading backwards from the bottom is frustrating.
Top-posting is possibly part of the reason people have unlearned how to trim posts, as they rarely scroll far enough down into the e-mail to see the stuff that is still trailing along in the e-mail.
As a Digest reader for most of the forums and e-mail lists I subscribe, not trimming material is a far worse frustration than top- versus bottom posting. I have no choice but to see all the untrimmed material over and over again as I scroll through the digest to find the start of the each message.
Equally bad are e-mail clients that don't effectively find a way to demark previous text being quoted by using > characters. I think when top-posting became the rage, software developers for e-mail clients quickly ignored that important piece of effective e-mails because it became so easy to just slap in a horizontal line or some text like "---Previous Message---" and call it good. Even indents get lost in the translation of message between different e-mail clients.
For what my comments and observations might be worth. I am only an occasional contributor on this particular list anyway, and so I will adapt to your requests so that I can remain a member. At least we aren't ALL SHOUTING AT EACH OTHER were we following the conventions of many systems of the eras that this list so often talks about, when upper-case only text was often the norm.
Kevin Anderson
> From: Jon Elson
> You should be able to safely power the machine with only a couple
> boards at a time to find which one is bad.
For debugging power supplies, a 'load module' (a card with only a bunch of
resistors on it) is invaluable. No trying to figure out where/how to connect
a large load resistor - just plug the board in.
DEC made several:
M7556 dual - +5V 1A -15V 375mA
M9049
M9060-YA quad - +5V 5A
M9713-AA dual - +5V 2.75A -15V .75A
The M7556 (at least) can be used on both QBUS and UNIBUS backplanes (since
they share the same pins for +5 and -12V (QBUS) and -15V (UNIBUS). Probably
all the others can be used on both buses, too, but check the pins they draw
>from first.
The M7556 can be easily modified (with a few etch cuts) into a +5/+12V load
module, but the resultant board can _only_be used in a QBUS.
If you can't find any of these (there are none left on eBay, but other
suppliers still seem to have them), another alternative is to get a blank
prototyping board from Douglas Electronics (http://www.douglas.com/),
and add your own resistors.
Noel
One complete Ashton Tate set, including XT keyboard template.
A couple of Borland dBaseIV (version 1 and 2) sets. Two sets still shrink wrapped.
Make an offer plus postage or they're off to the recycle bin. Shipping from New Jersey, USA
Kelly
Hi,
My Micro's power supply blew and I wanted to be in a fullsize cab anyway.
Can I bolt my Micro/PDP11 Q22 backplane into an 11/03 chassis easily?
Anyone know about feasibility / gotchas before I start experimenting?
thx
jake
I got the power cord for the microvax 3800 in the mail today. I checked the
fans as someone suggested, they Spin nice and smooth. I Iooked over
everything, nothing seems out of place. I powered the machine on. Very
quiet. I expected it to be much louder.
I turned the machine on and nothing exploded.
The KA660 cpu board has that little red lcd display ion it. A F is
displayed. Not sure if that is normal or not. I need a console cable. I
have a vt100 that works over here. What is the cable called, is it
something i could buy, or is it something that is easy enough to make?
--Devin
On Tue, Dec 8, 2015 at 3:37 PM, devin davison <lyokoboy0 at gmail.com> wrote:
> "So a 9-track open-reel SCSI drive should work just as well as a DDS,
> DLT, SLT drive."
>
> Oh wow. i had not even considered that. I have a pdp 11 with a beast of a
> 9 track tape drive in is's own rack, that would be interesting if i could
> get a scsi tape drive for the vax and use some big tapes to move data
> between the two.
>
>
> On Tue, Dec 8, 2015 at 11:38 AM, Johnny Billquist <bqt at update.uu.se>
> wrote:
>
>> On 2015-12-08 17:02, Paul Koning wrote:
>>
>>>
>>>
>>> On 2015-12-07 20:36, Christian Gauger-Cosgrove wrote:
>>>
>>>> On 7 December 2015 at 14:29, Johnny Billquist <bqt at update.uu.se> wrote:
>>>>
>>>>> I think all (modern PDP-11) OSes can install from TMSCP tapes. RSTS/E
>>>>> is
>>>>> more picky than some others, though, if I remember right...
>>>>>
>>>>> Yes, RSTS/E installs from TMSCP just fine (as can RSX-11/M+); I know
>>>> that in simh you can bring up Ultrix-11 3.1 only on TMSCP
>>>> (specifically a TK50), at least if you want all of the packages to
>>>> install. I've installed RSTS/E 10.1-L from MASSBUS, TS11, TM11, and
>>>> TMSCP in my various experimentation with emulation, it really doesn't
>>>> care what the tape is as long as your SYSGEN device is consistent.
>>>>
>>>
>>> One detail on "it doesn't care what the tape is": RSTS kits on 1/2 inch
>>> tape come in 800 and 1600 bpi versions. They have different boot blocks,
>>> each of them designed to work with all tape drives/controllers supported on
>>> RSTS that support the density in question. For example, the 1600 bpi kit
>>> doesn't boot on a TM11 controller, and the 800 bpi kit won't boot on a
>>> TMSCP controller. This matters if you try to boot one in an emulator where
>>> physical tape density doens't have any meaning.
>>>
>>
>> Unsubscribed from cctalk now, so I'm not sure if this will get through or
>> not.
>>
>> The RSX installation tape should boot from all tape devices, no matter
>> what density. The disk boot blocks are somewhat more specific. MSCP sits
>> together with massbus and RK06/RK07. RK05, RL01/02, RP02/03 as well as P/OS
>> drivers are separate boot blocks. Of those, only the RL02 is actually
>> supported by M+. So in practice, you only see one of two disk boot blocks
>> around for M+. 11M use pretty much anything, I'd think.
>>
>> Johnny
>>
>>
>
>
> Er nope it just refers to android
>
> R
He didn't include a signature in that message. Try looking at an earlier one.
Here's another explaination.
When someone receives this message, where are they supposed to start reading?
They have to rummage through to the middle to find where it started, read
the question originally asked, read down to see my answer, jump to the top to
read the request for further clarification, read further to see my reply to
that and so on. This gets really tedious when trying to follow a discussion.
Top posting may work ok for emails between individuals, assuming they can live
with only reading the first few lines of each mail. On a mailing list, it's
too much to assume that everyone will have archived all the mails that went
back and forth on the particular topic and will be immediately familar with
all the discussions that might be in progress at any one time. When someone
receives a long mailing list posting starting with (for example):
"When I tried that, I got smoke coming out of the power supply"
there then follows a session of jumping up and down through the email trying to
find exactly which piece of advice the poster was following when they got this
result. To do this, they have to find the points in the email where to jump
backwards and forwards. Sometimes there are clues such as included headers.
Sometimes there aren't. Sometimes the headers have dates in US format or non-US
format that looks like US format and times in various miscellaneous timezones
making it really hard to tell which not very well defined section was posted
before which other not very well defined section. Sometimes there are no dates
or times.
Then the list owner politely asks people to try to follow a particular
procedure and the response ranges from "I won't!" to "I can't!" to "Why should
I!" to "Look, I can be even more irritating if I really try harder!".
It appears that the main concern for some posters is "How can I get my crucially
important (to me) posting to the most recipients with the least effort on my
part?" Would it not be nicer if we could all be more concerned with "How can I
make my posting as useful and easy to follow as possible for most recipients?"?
Maybe some people might prefer to be on a write-only mailing list?
Regards,
Peter Coghlan.
On 10/12/2015 12:28, Peter Coghlan wrote:
>> I'm not sure I understand what all this posting business is about.
>> The application (Thunderbird) puts the text where it wants.
>> In my case at the top. ie LIFO or latest first. It does the same with
>> the list of messages
>>
>> Decmail did this from its inception as did the IBM, HP. etc mail systems.
>> I can't understand what the fuss is about. Please explain
>>
> The explaination in the signature in some of David Griffith's postings is about
> the best and most succinct I've seen.
>
> Regards,
> Peter Coghlan.
*sorry a copy went out prematurely...
So I got my hands on an HP 88780 1/2" Tape Drive from list Member Mark
(Thanks!). The drive physically looks to be in good shape but was pretty
dirty when I got it. I've cleaned up the drive and powered it up.
The good news:
The drive powers up. Initially I had trouble getting it to load a tape but
that seems to have been resolved. The BOT, EOT sensors are good and the
basic drive mechanism (motor, eject, etc.) seem to be working.
The bad news:
Some of the front panel buttons are not working. Running test 72 shows
failure in the unload/rewind and online buttons. Luckily it seems to be a
mechanical problem. If I short the switch on the circuit board then the test
passes. The switches are mechanical push buttons that are soldered on so
should be easy to replace. Anyone know of a good or OEM equivalent
replacement? If need be I can get pictures of the buttons off the PCB.
The worse news:
The tape drive will not read/write. I ran test 01 which per the service
manual does a full general checkout of the drive. The test is a conglomerate
of other test routines. It fails when it tries to run test 177 (Buffer Write
Density ID). This is where I am currently stock and need advice on how to
proceed.
Any help is appreciated. TIA
-Ali
