Hi folks,
An M9301-YB bootstrap terminator that I’ve been using during the restoration of
a PDP-11/45, which has previously worked fine, now seems to be failing on me.
Examining the contents from the front panel I see a few words with different
values than the ones that Noel has listed in his
>
>
> There is a note in the M9301 Operator’s Manual about the layout of the
> PROMs - words split into 4 bit fields programmed in all the PROMs in
> “parallel”, lower 8 bits inverted to support extra invert in the switch
> circuitry, and higher-addressed bank in the lower-half of the PROMs. 512x4
> From: Al Kossow
> You need moving air, though.
> I'm not sure how you do that well in a TK50 style cartridge.
Hmm, maybe not? I start with the need for moving air - which I do not
dispute, just wondering what the needed effect is. I don't think it can be
removing out-gassed material
On 7/4/17 7:53 AM, Noel Chiappa via cctalk wrote:
> > From: Al Kossow
>
> > You need moving air, though.
> > I'm not sure how you do that well in a TK50 style cartridge.
>
> Hmm, maybe not? I start with the need for moving air - which I do not
> dispute, just wondering what the need
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Noel
> Chiappa via cctalk
> Sent: 04 July 2017 15:53
> To: cctalk@classiccmp.org
> Cc: j...@mercury.lcs.mit.edu
> Subject: Re: tape baking
>
> > From: Al Kossow
>
> > You need moving air, thoug
> From: Fritz Mueller
> A question for Noel if he's listening here
You rang? :-)
> how did you obtain your YB listing
I plugged one in, and ran a small program that dumped the contents to the
serial port.
> would you consider it reliable?
Reasonably. If there was bit-rot in th
>
>
>
> > I may also have a go at writing a program I can toggle in to read the
> > contents of my failing M9301 and dump them out over the console
> serial
> > to enable a systematic comparison
>
> Let me find the one I wrote, and upload it.
>
> Noel
>
I have a 9301-YB and whe
> From: Noel Chiappa
>> I may also have a go at writing a program I can toggle in to read the
>> contents of my failing M9301 and dump them out over the console serial
>> to enable a systematic comparison
> Let me find the one I wrote, and upload it.
Here you go:
http://an
I pulled out the M9301 and M9302 drawings from the set and uploaded them to
bitsavers dec/unibus
On 7/4/17 8:34 AM, Noel Chiappa via cctalk wrote:
> As Mattis says, they are in the 11/04 drawings (MP00019). But I'm a bit
> puzzled why you didn't find them online; I have a page, "'Missing' Digita
Hi folks, thanks for all the help!
> On Jul 4, 2017, at 8:34 AM, Noel Chiappa via cctalk
> wrote:
>
>> I see a few words with different values than the ones that Noel has
>> listed in his partial M9301-YB disassembly.
>
> Any chance you could send in some of the differences? I can take a look
On Mon, Jul 3, 2017 at 7:47 PM, Ed via cctalk wrote:
>
> Windows 10 recent creator release may take your printer out.
FWIW, this is nothing new with Windows: when the switch from Windows
2000 to XP happened, a lot of HP printer owners (I don't know if it
was limited to HP, sorry) was stuck wit
Windows 10 recent creator release may take your printer out.
On Tue, 4 Jul 2017, Torfinn Ingolfsen via cctalk wrote:
FWIW, this is nothing new with Windows: when the switch from Windows
2000 to XP happened, a lot of HP printer owners (I don't know if it
was limited to HP, sorry) was stuck wit
After you got the TK50 tapes and the TZ30 drive working together, what
computer system and software utilities did you use to recover the data
from the tapes?
Did you first recover the data into a format that preserved blocking
information such as SIMH .TAP format? (
http://simh.trailing-edge.com/d
If you can pick these up at my home in Mountain View, CA you are welcome to
them.
BYTE
1975-1976: #1, #2, #4, #5, #8, #9, #10, #11, #12, #13, #14, #15, #16
1977 V2 #1-#12
1978 V3 #1-#3
1979 V4 #8 LISP
1980 V5 #8 FORTH
1981 V6 #8 SMALLTALK
1982 V7 #8 LOGO
1983 V8 #8 C
1984 V9 #8 MODULA-2
1985 V10
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Glen Slick
> via cctalk
> Sent: 05 July 2017 03:12
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: tape baking
>
> After you got the TK50 tapes and the TZ30 drive working together
Well, the situation had worsened on my M9301 to the point where every single
word was affected, and then it was easy to see that it was always in the
least-significant four bits. So I pulled and reseated that PROM, then went
ahead and did the other three as well for good measure (really should
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