Found a single 2716 EPROM on the Altos and pulled it out and read it in with my
MiniPro TL866CS and it comes back as entirely 00. Since that seemed pretty odd
I grabbed another 2716 out of an old Nintendo board and it reads fine, so I'm
pretty sure the TL866CS can read 2716.
I have a feeling th
> On Jun 15, 2015, at 13:46 , Pontus Pihlgren wrote:
>
> On Mon, Jun 15, 2015 at 04:55:57PM +, tony duell wrote:
>>
>> Unfortunately I believe you. Use at least a thousand times more components
>> than
>> you need to.
>
> Actually it's just two, a Teensy and a usb cable. (Sorry, I couldn'
All zeroes is really strange - a blank EPROM is all ones, so it’s not that it
got exposed to UV light.
Ian
> On Jun 15, 2015, at 1:52 PM, Chris Osborn wrote:
>
> Found a single 2716 EPROM on the Altos and pulled it out and read it in with
> my MiniPro TL866CS and it comes back as entirely 00.
> On Jun 15, 2015, at 13:53 , Pontus Pihlgren wrote:
> No but I would put an electric heater in a steam engine if it meant
> restoration would progress faster.
As long as you don't damage the firebox installing your heater, what's the big
deal? Making first steam is going to be a gradual and c
On Mon, Jun 15, 2015 at 1:52 PM, Chris Osborn wrote:
> Found a single 2716 EPROM on the Altos and pulled it out and read it in
> with my MiniPro TL866CS and it comes back as entirely 00. Since that seemed
> pretty odd I grabbed another 2716 out of an old Nintendo board and it reads
> fine, so I'm
On Mon, Jun 15, 2015 at 01:59:11PM -0700, Mark J. Blair wrote:
>
> Big. VERY big. :)
>
> And one more thing (until the next thing comes to mind): I consider
> this to be an enjoyable and level-headed debate, just in case anybody
> gets the mistaken impression that I'm trying to come down hard on
> From: Mark J. Blair
> I could replace an M1 Carbine trigger spring on the spot, or a HMMWV
> taillamp housing ... Should I criticize you for not having SAE grade 8
> hardware on hand, or Bristo wrenches
I think Tony's point was that someone who's into vintage computers ought to
On Jun 15, 2015, at 1:56 PM, Ian McLaughlin wrote:
> All zeroes is really strange - a blank EPROM is all ones, so it’s not that it
> got exposed to UV light.
It definitely does seem strange. I wonder if maybe it’s a TI style 2716? It’s a
National Semiconductor MM2716Q.
--
Follow me on twitte
On Jun 15, 2015, at 2:01 PM, Josh Dersch wrote:
> I have an ACS 8000-10 at home (which I believe is the same machine with a
> smaller hard drive), let me see if I can read the EPROM out of it tonight…
It actually might be essentially the same machine. From what I can tell the 15A
originally sh
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Pontus
> Pihlgren
> Sent: 15 June 2015 22:06
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: using new technology on old machines. Was: PDP-12 Restoration
at
> the RICM
>
> On Mon,
The NatSemi MM2716Q is definitely the ‘normal’ single rail EPROM. The TMS2716
is the TI version that is 3-rail. A quick test would be to measure pin 19 in
circuit. If this is 12v, then it’s expecting a TI part.
Does your reader have any other ‘brands’ of 2716 you could try? What about
tryin
On Jun 15, 2015, at 2:19 PM, Noel Chiappa wrote:
> Having said that, _I_ don't have 2N3904s nor NE555s around either! I do have
> a modest number of parts (e.g. 4164's, 40-ping Berg shells, .250 tab
> hardware, etc, etc) - a large enough collection that I just had to
> re-organize and add more p
On Jun 15, 2015, at 2:36 PM, Ian McLaughlin wrote:
> Does your reader have any other ‘brands’ of 2716 you could try? What about
> trying to read it as a 2732? Looking at the pinouts it looks like the only
> difference is pin 21 which is Vpp (programming voltage) on a 2716 and A11 on
> a 2732.
A friend of mine refused to buy modern SD Cards because there was no way he
was going to fill them. Trouble is that although smaller SD cards were
available they were way more expensive (being discontinued and therefore
rare and valuable).. He struggled with buying a larger card only to waste
most
> On Jun 15, 2015, at 14:56 , Dave G4UGM wrote:
>
> A friend of mine refused to buy modern SD Cards because there was no way he
> was going to fill them. Trouble is that although smaller SD cards were
> available they were way more expensive (being discontinued and therefore
> rare and valuable)
> From: Dave G4UGM
> Trouble is that although smaller SD cards were available they were way
> more expensive (being discontinued and therefore rare and valuable)..
One wonders why some manufacturer didn't realize there was money to be made
in smaller cards (now less competition, but
> On Jun 15, 2015, at 14:19 , Noel Chiappa wrote:
> I think Tony's point was that someone who's into vintage computers ought to
> have a stock of suitable parts for them.
Yes, that'll likely be true once they have been in the hobby for a while. But
for somebody who has gotten into it recently,
> On Jun 15, 2015, at 15:07 , Noel Chiappa wrote:
>
> One wonders why some manufacturer didn't realize there was money to be made
> in smaller cards (now less competition, but still enough demand to drive the
> prices up) and keep making them.
Because the chip fab equipment that was used to mak
On 2015-06-15 12:57 PM, Dave G4UGM wrote:
-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of ben
Sent: 15 June 2015 17:18
To: cctalk@classiccmp.org
Subject: Re: FPGA tricks - Re: using new technology on old machines. Was:
PDP-12 Restoration at the RICM
On
> On Jun 15, 2015, at 14:27 , Robert Jarratt
> wrote:
> This particular thread has all the hallmarks of one that *could* descend
> into a flame war. Thank you for avoiding that!
I think we're doing ok. The same folks having a spirited debate in this thread
are carrying on just fine together in
On 2015-06-15 12:18 PM, ben wrote:
On 6/15/2015 9:08 AM, Toby Thain wrote:
On 2015-06-15 9:35 AM, Dave G4UGM wrote:
I don't think it is over kill. If you want over kill try this:-
https://www.youtube.com/watch?v=ALXax3Gydl8
and FPGA implementation of the Baby or SSEM which had 32x32 bits of
Strobe Data make something like half of what you need:
http://www.strobedata.com/home/unibusfw.html
Unfortunately IIRC it's an 'if you have to ask the price you can't
afford it' kind of deal...
Mike
On Tue, Jun 16, 2015 at 3:57 AM, Mark J. Blair wrote:
> Has anybody ever made a UNIBUS repeater
> On Jun 15, 2015, at 16:26 , Mike Ross wrote:
>
> Strobe Data make something like half of what you need:
>
> http://www.strobedata.com/home/unibusfw.html
>
> Unfortunately IIRC it's an 'if you have to ask the price you can't
> afford it' kind of deal...
Interesting! Thanks for sharing! I co
On 6/15/2015 4:42 PM, Toby Thain wrote:
I think Tanenbaum should be fine? A lot of it is fairly timeless.
The latest version is *useless*. The racoons on the cover tells alot.
https://archive.org/details/OperatingSystemsDesignImplementation
I was looking all over for this version, online.
On 2015-06-15 8:09 PM, ben wrote:
On 6/15/2015 4:42 PM, Toby Thain wrote:
I think Tanenbaum should be fine? A lot of it is fairly timeless.
The latest version is *useless*. The racoons on the cover tells alot.
I figured, although I haven't seen it. My copy is 1987.
https://archive.org/d
> On Jun 15, 2015, at 8:09 PM, ben wrote:
>
> On 6/15/2015 4:42 PM, Toby Thain wrote:
>
>> I think Tanenbaum should be fine? A lot of it is fairly timeless.
>
> The latest version is *useless*. The racoons on the cover tells alot.
Or you could just read “The structure of the THE operating sys
On 2015-06-15 9:11 PM, Paul Koning wrote:
On Jun 15, 2015, at 8:09 PM, ben wrote:
On 6/15/2015 4:42 PM, Toby Thain wrote:
I think Tanenbaum should be fine? A lot of it is fairly timeless.
The latest version is *useless*. The racoons on the cover tells alot.
Or you could just read “The s
On 6/15/2015 7:11 PM, Paul Koning wrote:
On Jun 15, 2015, at 8:09 PM, ben wrote:
On 6/15/2015 4:42 PM, Toby Thain wrote:
I think Tanenbaum should be fine? A lot of it is fairly
timeless.
The latest version is *useless*. The racoons on the cover tells
alot.
Or you could just read “The st
>> Or you could just read â¿¿The structure of the THE operating
>> systemâ¿¿ by E.W.Dijkstra, and follow its principles.
> b) Most likely in German
German? With an English title, I'd guess it'd be in English, and IIRC
the E in THE stands for Eindhoven, which I'm pretty sure is in the
Netherlands
On 2015-06-15 9:21 PM, ben wrote:
On 6/15/2015 7:11 PM, Paul Koning wrote:
On Jun 15, 2015, at 8:09 PM, ben wrote:
On 6/15/2015 4:42 PM, Toby Thain wrote:
I think Tanenbaum should be fine? A lot of it is fairly
timeless.
The latest version is *useless*. The racoons on the cover tells
alo
On 2015-06-15 9:55 PM, Toby Thain wrote:
On 2015-06-15 9:21 PM, ben wrote:
On 6/15/2015 7:11 PM, Paul Koning wrote:
On Jun 15, 2015, at 8:09 PM, ben wrote:
On 6/15/2015 4:42 PM, Toby Thain wrote:
I think Tanenbaum should be fine? A lot of it is fairly
timeless.
The latest version is *us
> > Why not do it properly first time? What is the rush in bringing up a
> > classic computer? And for a test,
> > use the TTL pulse generator you have on your bench.
>
> I don't have one. I have a lot of test equipment, but mostly for RF work. If
> I needed to generate TTL pulses, I'd
> proba
> > I am very worried that people would rather use a microcontroller than change
> > a couple of passives. Can't anyone read a schematic and think
>
> The exact same argument could be made for somebody using an NE555 instead of
> discrete transistors to blink an
> LED, or discrete transistor
[My 11/730]
> Sorry to hear that it's been decabled. Take your time to route those cables
> through the bottom pan properly,
Yes, it's going to be a lot of work to get it back together.
I think I am going to start (when I have got the machine room straightened out,
etc) with the 2 parts
of t
> >
> > Unfortunately I believe you. Use at least a thousand times more components
> > than
> > you need to.
>
> Actually it's just two, a Teensy and a usb cable. (Sorry, I couldn't
> resist).
I am of course counting all the transistors inside that chip.
> How do you suggest I learn? I believe
> >
> > I am very worried that people would rather use a microcontroller than change
> > a couple of passives. Can't anyone read a schematic and think
>
> Nope. I didn't know this hobby required a degree in electrical
> engineering.
Well it had better not. I don't have one
> By your criteria
> > I could replace an M1 Carbine trigger spring on the spot, or a HMMWV
> > taillamp housing ... Should I criticize you for not having SAE grade 8
> > hardware on hand, or Bristo wrenches
>
> I think Tony's point was that someone who's into vintage computers ought to
> have a stock of
> On Jun 15, 2015, at 21:20, tony duell wrote:
>
> Mine did start out as the 'packaged' system in the half-rack, and I intend to
> keep it in that cabinet.
> Obviously I will keep the CPU and R80, but I am not sure if the tape drive is
> the most useful
> third unit at this stage.
In mine,
> On Jun 15, 2015, at 21:28, tony duell wrote:
> As am I. I've learnt a heck of a lot since I started (there is a common myth
> that there is something magic about a processor. This hobby has taught
> me to understand quite a few at the gate level). And the day I stop learning
> is the day I am i
On 6/15/2015 7:55 PM, Toby Thain wrote:
(The Structure of the "THE"-Multiprogramming System")
Are you sure? http://ur1.ca/mu60x
--Toby
I saw that paper before. Ben.
[11/730]
> In mine, an RL02 drive is the third unit of the rack containing the CPU
> cabinet, and the TU80 tape drive is too tall
As I understand it, there were intitially 2 'packaged' systems. One had the CPU
with an RL02 under it for the
OS disk and an RL02 on top for the user disk. The oth
Does anyone happen to know what sort of computers Fairchild would have been
using in the late 60's for design work?
Zane
On 6/15/2015 7:58 PM, Toby Thain wrote:
It's also one of the papers in the Brinch Hansen book cited earlier in
the thread. (Google books: http://ur1.ca/mu61v )
Too much $$ for me at the moment (even online version).
--Toby
Ben.
>
> In my opinion, the magic is inside the transistor. Once you bottle enough
> magic to make a good transistor, the
> rest is pretty straightforward. :)
Err, yes... It is impossible to understand the transistor using classical
physics
People have made transistors at home, even made their
> On Jun 15, 2015, at 21:40, tony duell wrote:
>
> Exactly. I don't do firearms at all (we have various IMHO ridiculous laws in
> the UK,
> but I do not want to start that debate)
Sorry I even brought it up; I was just using it as an example of the different
specializations that each person m
> On Jun 15, 2015, at 21:55, tony duell wrote:
>
> [11/730]
>
>> for that slot (though one of the later front-loaders would probably fit). If
>> you don't need an RL02 drive, then i
>
> That's what they did. There was a third (later) packaged system with the CPU,
> an R80 under it and a fro
>
> > But if you are going to repair/restore something then IMHO it makes a lot of
> > sense to have common spares around.
>
> Agreed! But you generally tend to accumulate those spares *after* you have
> been involved in that particular
True. I wil bet you didn't have firearm spares when you f
> On Jun 15, 2015, at 21:59, tony duell wrote:
> Even though there are at least 4 different USB connectors
Ok, you got me there! When I was working for a GPS startup, I used mini-B on
everything I designed with USB (always devices, never hosts, and no need for
USB OTG). Then we got bought
Good Morning All Panel Fans!!
According to the shippers the first consignments of PDP-8/e front panels
were delivered in the US yesterday,
Confirmations and comments to me please.
Rod Smallwood
From: cctalk [cctalk-boun...@classiccmp.org] on behalf of Mark J. Blair
[n...@nf6x.net]
Sent: 16 June 2015 06:06
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Serial UNIBUS Repeater?
> > [11/730]
> >
> >> for that slot (though one of t
>
> The M452 creates a 110 Hz clock for the TTY transmitter and a 880 Hz clock
> for the TTY receiver.
Does it? The prints I have show the 2 outputs with a factor of 4 (not 8) in
frequency.
> The M405 for the DP12-B serial port generated a clock that is 16x the baud
> rate which is then divided
I suppose it depends on what you're working on ... I have a BSEE but only
practice as a hobby ... and I am still mostly in the DIP, through-hole era
... by choice, I suppose ... I wanted to move beyond the level of depending
on pre-manufactured development or demonstrator boards and understand how
I thought I'd take a quick spin through the operating systems section of my
library now that I'm at home just to give you some titles that you might
want to check out.
1. Toby mentions Tanenbaum's Minix book and that's a fairly canonical text
... there is a lot of great information in there but IM
>
> Date: Mon, 15 Jun 2015 05:01:36 +
> From: tony duell
> Subject: RE: PDP-12 Restoration at the RICM (tony duell)
> >
> > Tony, thank you for your offer to supply replacement M452 Variable Clock
> > modules for the console. We already have one jumpered for 110 baud for
> the
> > Teletype. Th
On 6/15/2015 5:10 PM, Sean Caron wrote:
I thought I'd take a quick spin through the operating systems section of my
library now that I'm at home just to give you some titles that you might
want to check out.
1. Toby mentions Tanenbaum's Minix book and that's a fairly canonical text
... there is
On Tue, Jun 16, 2015 at 04:32:23AM +, tony duell wrote:
>
> Oh come on. You yourself said you are here to learn. This module
> is hardly complicatated.
Well, you got me there :)
/P
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