On 10/06/2017 11:22 AM, systems_glitch via cctalk wrote:
> AFAIK the DZQ11 uses a totally different register layout than the
> DL11/DLV11 and won't work with any OS or bootstrap for TU58 -- at least not
> without modification. The simple thing to do is get a DLV11 and set it up
> as SLU0 for TU58.
On 10/05/2017 09:39 PM, Jerry Weiss via cctalk wrote:
> The DK Driver for VMS versions around 5.x definitely had a problem with
> non-DEC disks. 6.X and greater were slightly more forgiving.
Having many of the era DEC VAX I can say the only SCSI issue I had was
the boot disk greater than 1.07 GB
On 10/05/2017 05:37 PM, Chuck Guzis via cctalk wrote:
> On 10/05/2017 01:27 PM, Paul Berger via cctalk wrote:
>
>> I once had a Tecmar SASI adapter (I still have the documentation
>> and diskette) I seem to recall that it was mostly buffers which
>> would suggest that most of the work was done by
On 10/05/2017 03:46 PM, Chuck Guzis via cctalk wrote:
> On 10/05/2017 04:22 AM, allison via cctalk wrote:
>
>> Funny the market knew of the 386 in the fall of '85 but it would be
>> three years before I'd see
>> one in the field. Disks and CPUs lagged the intr
On 10/5/17 5:53 AM, Christian Corti via cctalk wrote:
On Wed, 4 Oct 2017, Guy Sotomayor Jr wrote:
Also, the early desktop PS/2 (model 50 and such) had the controller
integrated on the drive and those were Maxtor as I recall. The PS/2
shipped in 1987 and we had the drives in labs at least 12-
On 10/04/2017 04:22 PM, Adam Sampson via cctalk wrote:
> On Wed, Oct 04, 2017 at 12:03:44PM -0700, Tom Gardner wrote:
>> [...] can I assume that the other ads u found were also CompuAdd clone
>> ads? CompuAdd is really interesting because it clearly predates the
>> CAM meeting in early 1989. Here
Seriously,
one name was forgotten, WD, that the drive maker but the chip maker.
The chipset used for
board then drive level was the same or successors and the came from WD.
Allison
On 10/04/2017 03:03 PM, Tom Gardner via cctalk wrote:
> Adam – thanks for the research, can I assume that the oth
On 10/3/17 12:10 PM, Chuck Guzis via cctalk wrote:
On 10/03/2017 05:37 AM, wrco...@wrcooke.net wrote:
fwiw in the late 80s I was the service department at a small PC
store. I remember seeing these newfangled drives in Compaq
computers, but I don't remember exactly when. Perhaps 88? Wikipedi
On 10/2/17 10:13 AM, Jules Richardson via cctech wrote:
On 10/02/2017 08:29 AM, allison via cctech wrote:
On 10/2/17 8:22 AM, Jules Richardson via cctech wrote:
On 10/02/2017 01:46 AM, Alan Perry via cctech wrote:
There was a call to form the CAM (Common Access Method) Committee
of X3T9.2
On 10/2/17 9:40 AM, william degnan wrote:
ATA-IDE and SCSI (OK SASI) are about the same age but had
different adoption and growth rates.
Earliest SASI/SCSI was AmproLB+ and Visual 1050 with adaptor. I
have both with hard disks.
FYI the Z80 powered AMPROLB+ was 1984 intro
On 10/2/17 8:22 AM, Jules Richardson via cctech wrote:
On 10/02/2017 01:46 AM, Alan Perry via cctech wrote:
There was a call to form the CAM (Common Access Method) Committee of
X3T9.2
(SCSI-2) on 30 Sept 1988 and they first met on 19 Oct 1988. The primary
goal was to come up with a SCSI subse
On 10/01/2017 04:55 PM, Jon Elson via cctalk wrote:
> On 10/01/2017 02:58 PM, Chuck Guzis via cctalk wrote:
>> On 10/01/2017 12:46 PM, Tom Gardner via cctalk wrote:
>>> I've looked for but cannot find any WD or Compaq documents publically
>>> using IDE to describe what ultimately issued as ATA-1.
On 09/29/2017 06:42 PM, Peter Corlett via cctalk wrote:
> On Fri, Sep 29, 2017 at 01:08:24PM -0700, Fred Cisin via cctalk wrote:
>>> On 09/29/2017 11:20 AM, Jon Elson via cctalk wrote:
> [...]
>>> Older BIOS firmware provided no means for the user to define the geometry of
>>> a connected drive - j
On 9/28/17 10:21 AM, Geoffrey Oltmans wrote:
On Wed, Sep 27, 2017 at 11:16 AM, allison via cctalk
mailto:cctalk@classiccmp.org>> wrote:
IDE disks format usually meant high level only. SCSI could be
either depnding on the specific controller and media.
Seems like the om
On 9/27/17 10:59 AM, Ethan via cctalk wrote:
IIRC, the first time I had problems with the low level format was
with one
of the early IDE controllers and a 230MB Maxtor. Crapped out the entire
firmware, was never able to get it to admit who it was again. Seemed to
work okay with earlier MFM/RLL
On 9/27/17 12:04 PM, Liam Proven via cctalk wrote:
On 26 September 2017 at 21:33, Phil Blundell via cctalk
wrote:
Low-level formatting (which, at the time, was just called "formatting")
used to be quite a routine operation on ST-506 MFM and RLL hard disks.
They usually came completely blank f
Huge temporal disconnect.
The smcc manual is from 1966... S100 was first seen as the MITS altair
in late 1974.
Allison
On 09/17/2017 03:03 PM, Ed via cctalk wrote:
> well there is this total cool book and picture!
>
> http://www.smecc.org/digiac.htm
>
> we would love to find the
On 8/16/17 9:38 AM, Ethan Dicks wrote:
On Tue, Aug 8, 2017 at 8:35 AM, allison via cctalk
wrote:
Note: TU58 (variant of DC100 tape) to my knowledge was never used with PDP-8
in any flavor. There is no reason why not other than no driver and it 8bit
only and the blocking is 512bytes.
I
Note: TU58 (variant of DC100 tape) to my knowledge was never used with PDP-8
in any flavor. There is no reason why not other than no driver and it
8bit only
and the blocking is 512bytes.
The 8bit part is solved by storing 2 words (12bit word) to 3 bytes (24bits).
It could be quite handy as a
On 8/7/17 1:43 AM, Chuck Guzis via cctalk wrote:
On 08/06/2017 04:16 PM, Gary McGill via cctalk wrote:
I have an Visual 1050 computer (CPM based) with screen and keyboard.
Probably works but I have not tried it yet. Will likely uncover boot
disks, and other software.
Anyone interested to pay
On 8/2/17 8:49 AM, Al Kossow via cctalk wrote:
On 8/1/17 10:36 PM, Ulrich Tagge via cctalk wrote:
Looks like I was wrongly under the impression, that there is no way to
reformat, disks to work in an RX02.
There is no way to low-level format disks on a DEC RX01 or RX02. The hardware
doesn'
For those of us with robust well protected systems (or disposable
machine running in VM) the URL is for a papers (as in assignments) for a
price site. The first page is fairly safe but its a malware site.
Allison
On 7/25/17 11:39 AM, Paul Koning via cctalk wrote:
On Jul 25, 2017, at 11:33
On 07/23/2017 06:12 PM, Dave Wade via cctalk wrote:
> It's a "watch" quartz crystal...
>
> http://www.explainthatstuff.com/quartzclockwatch.html
>
> probably used to set the master frequency for the UART/Serial interfaces...
NO, not at all. To low a frequency as many of them use 16x clock for
bau
On 07/23/2017 06:09 PM, Mattis Lind via cctalk wrote:
>>
>>
>> It is QZ1 in the following picture:
>> https://rjarratt.files.wordpress.com/2017/07/wp_20170723_22_38_20_pro.jpg
>>
>> It is a 32768 Hz crystal / resonator.
> /Mattis
> \
No question about it a 32768Hz crystal. Likely used to TOD/TOY
On 07/11/2017 04:31 PM, Mattis Lind via cctalk wrote:
> Hi!
>
> I have a Plessey floppy as part of a 11/34 system. Does anyone have info
> about it? It appears that the controller is similar to the XCV21
> controller.
>
> https://i.imgur.com/NxGPBFN.jpg
> https://i.imgur.com/NOg7WfZ.jpg
> https://i
On 07/09/2017 01:43 PM, Glen Slick via cctalk wrote:
> On Sun, Jul 9, 2017 at 10:25 AM, Chuck Guzis via cctalk
> wrote:
>> On 07/09/2017 07:30 AM, Al Kossow via cctalk wrote:
>>>
>>> On 7/8/17 5:18 PM, Chuck Guzis via cctalk wrote:
>>>
From his photo, it does appear to be S100-sized.
>>> I di
On 07/05/2017 04:14 PM, jim stephens via cctalk wrote:
>
>
> On 7/5/2017 12:32 PM, GerardCJAT via cctalk wrote:
>> PLEASE, under what directory you put the pdf of the manual ??
> http://bitsavers.informatik.uni-stuttgart.de/pdf/micromint/
Thats only for the SB180FX... there are two versions the SB
On 07/02/2017 06:54 PM, Fred Cisin via cctech wrote:
> On Sun, 2 Jul 2017, John Wilson wrote:
>> That sounds like the MPX16? I thought the SB180 was a Z180 thing.
>
> You're right.
>
> Sorry
> thinking about the wrong one.
Yes for sure, as I have both SB180 and BCC180 both are Z180 based.
He also
On 06/26/2017 11:29 AM, Brad H via cctech wrote:
> Thanks Nick!
>
> I had thought about selling PCBs or creating a kit, but I lack the skill to
> draft it in PCB CAD software. The boards I made come from scans of the plans
> (on swtpc.com), and I really had to tweak those to get them to work. A
On 06/16/2017 09:04 AM, Ed Thierbach via cctalk wrote:
> BACKUP/IMAGE might work. I have a dim recollection of moving system drives
> around that way, but it's been a few decades. :-)
I have cloned drives that way for VMS systems. Backup/image is the tool
for that.
Allison
> Best of luck, an
On 06/05/2017 05:38 PM, Al Kossow via cctalk wrote:
>
> On 6/5/17 2:06 PM, Brent Hilpert via cctalk wrote:
>
>> I checked several Moto databooks from 1969 into the 70s last night and
>> didn't find it. (Not to suggest my checking is the last word).
>> SDA7 is not a 'standard' Motorola-style number
On 05/27/2017 09:15 PM, Josh Dersch via cctalk wrote:
> So I had a random thought in the wee hours this morning and I leave it
> to you, the cctalk braintrust, to tell me exactly how stupid this idea
> is:
>
> I have a VAX-11/750, an Able QNiverter (UNIBUS->Qbus adapter), a
> 22-bit Qbus backplane,
On 05/25/2017 12:18 AM, Chuck Guzis via cctalk wrote:
> On 05/24/2017 12:49 PM, allison via cctalk wrote:
>
>> I remember when RTL was new and uRTL was a later improvement.
> Flatpack and TO-100. I probably still have a few mW RTL packages
> around. DIPs came later.
Both and
On 05/24/2017 02:19 PM, ben via cctech wrote:
> On 5/24/2017 12:30 AM, Chuck Guzis via cctalk wrote:
>> On 05/23/2017 05:31 PM, Andrew Harvey via cctalk wrote:
>>> I don't think Indivudual Computers make the catweasle any more. They
>>> never
>>> released a 64bit Windows driver for it.
>>
>> In poi
On 5/24/17 3:35 PM, Chuck Guzis via cctalk wrote:
On 05/24/2017 11:19 AM, ben via cctalk wrote:
But who wants to write the software?
Yes, just so. I learned about that one decades ago.
I am building a 1977 ttl style computer because now I have spare time.
Finding vintage or similar device
On 05/24/2017 03:58 AM, Rob Jarratt via cctalk wrote:
>> -Original Message-
>> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Randy
>> Dawson via cctalk
>> Sent: 24 May 2017 07:47
>> To: jim stephens ; steven stengel ;
>> General Discussion: On-Topic and Off-Topic Posts
>
On 05/22/2017 07:44 PM, Mark J. Blair via cctalk wrote:
>> On May 22, 2017, at 1:19 PM, steven stengel via cctalk
>> wrote:
>>
>> Please let me know if I may, or may not, place your information on the
>> public webpage.
> As long as it's just city and email address, I don't mind being on the lis
On 05/21/2017 01:02 PM, Al Kossow via cctalk wrote:
>
> On 5/21/17 8:51 AM, Rob Doyle via cctalk wrote:
>
>> How 'bout a brand new J11-based board for oldie S-100 systems?
> Reinventing incompatible I/O for existing operating systems.
>
> Maybe if they wrote a new unencumbered OS, but I'm not holdi
On 05/21/2017 11:51 AM, Rob Doyle via cctalk wrote:
> On 5/20/2017 7:01 AM, allison via cctalk wrote:
>> Best chip for hacking and useful off a board (Falcon, KXT11, RQDX,
>> others) is the T11. Its easily > useful like a 8085 or Z80.
>
> How 'bout a brand new J1
On 05/20/2017 06:40 PM, jim stephens via cctech wrote:
>
>
> On 5/20/2017 3:20 PM, Paul Anderson wrote:
>> Hi Jim,
>>
>> I have the M8189 11/23+ boards here. call me tonight if you want.
>>
>> Paul
>>
> Are there any reasonably priced boards with the processor and memory
> of either the KDF or KDJ
On 05/21/2017 02:10 AM, Tony Duell via cctalk wrote:
> On Sun, May 21, 2017 at 3:08 AM, allison via cctalk
> wrote:
>
>> The only boards with T11 I have are RQDX1/2/3. However I have a few
>> T11s that were ES parts from
> As an aside, there's a T11 in the VT240
On 05/20/2017 05:56 PM, jim stephens wrote:
>
>
> On 5/20/2017 7:01 AM, allison via cctalk wrote:
>> Argh, CPU chips used on dec board loose value as the complete board
>> carries the value.
>>
>> KDF with the second chip is useful but the logic needed to may a
On 05/20/2017 04:59 AM, jim stephens via cctalk wrote:
> I just ran across a sale on epay by a guy who thought you could pull
> the processor chip off the board and sell each in separate auctions.
>
> I couldn't find the processor from the huge number of gold scrap chip
> auctions he had, but he sa
On 05/19/2017 07:49 AM, Liam Proven via cctalk wrote:
> On 19 May 2017 at 13:36, Bill Gunshannon wrote:
>> Nope. Take a trip to Amazon and look at just how much power this stuff
>> actually consumes. And, if you go back to the days when we started
>> running this stuff in our homes, compare the d
On 05/18/2017 03:50 PM, Bill Gunshannon via cctalk wrote:
> COSMAC Elf? :-)
Why not, or a PdP-8. It really is not a high load operation. It was
more about storage.
Allison
> bill
>
> From: cctalk [cctalk-boun...@classiccmp.org] on behalf of geneb via c
On 5/18/17 3:14 PM, Chuck Guzis via cctalk wrote:
On 05/18/2017 10:44 AM, geneb wrote:
Because. That's why. :)
Well, okay--but then let's be period-correct. The PDP-11 dates from
1970, when, AFAIK, BBSes, if they existed, were far from what people
think they were.
I'm thinking of,say, Cal
On 5/18/17 3:19 PM, geneb via cctalk wrote:
On Thu, 18 May 2017, allison via cctalk wrote:
On 5/18/17 12:51 PM, Adrian Stoness via cctalk wrote:
So a 11/03 aka a lsi11 would be to slow for such things? Such as those
Heathkit h11 lsi11 macheans? Witch was a hobyist pdp11 for those
that
ia cctalk"
wrote:
On 05/18/2017 08:16 AM, allison via cctalk wrote:
The real question is why BBS? What is it trying to fix or enable?
You put the words into my mouth. Thank you.
--Chuck
via cctalk"
wrote:
On 05/18/2017 08:16 AM, allison via cctalk wrote:
The real question is why BBS? What is it trying to fix or enable?
You put the words into my mouth. Thank you.
--Chuck
On 5/18/17 9:45 AM, william degnan via cctalk wrote:
There may have been Rainbow BBS programs, but I doubt anything for the
11/34. You may have to write this.
That reminds me of a bit of obscure trivia...
Back in the early days of FidoNet, one or more of the Fido BBS sysops had
DEC Rainb
On 05/09/2017 09:56 PM, william degnan via cctech wrote:
> Hi,
>
> I was contacted though my site by someone looking for a boot disk for their
> California Computer System S-100 2200 computer with Morrow's Disk Jockey
> DJ/DMA floppy disk controller. I checked and found what might be a
> suitable
>>
>> Looks like ODS2. The files appear to be RUNOFF. Quick guess is that they
>> are the appendices to some document or manuscript.
>>
>>
> Mr Obvious here (missed the handwritten text in the label at first).
>
> The .RNO files should contain human readable
On 05/05/2017 03:33 PM, Fred Cisin via cctech wrote:
> On Fri, 5 May 2017, Bill Gunshannon via cctalk wrote:
>> But I thought the problem was that most disk controllers can't do RX02.
>> Everybody doesn't have a Catweasel or Cryoflux.
>
> That's right.
> Chuck's suggestion would require that somebo
On 05/05/2017 03:39 PM, Fred Cisin via cctalk wrote:
>> > Terry is doing it for fun; we can't expect the others to.
>
> On Fri, 5 May 2017, Bill Gunshannon via cctalk wrote:
>> I would. :-) Or maybe for beer.
>
> I doubt that Allison will want to underbid THAT!
>
>
Free beer?!? No, no,no...
All
On 05/04/2017 07:01 PM, Rich Alderson via cctalk wrote:
> From: Terry Stewart
> Sent: Thursday, May 04, 2017 2:41 PM
>
>> Just tying up some unfinished business. Right at the beginning of this
>> thread I said...
>>> Guys in the building next door to me (a Science lab) have found some 8 inch
>>> f
On 05/04/2017 09:27 PM, Fred Cisin wrote:
> Thank you!
>
> Now, the question will be whether Allison has some free time to check
> them out for Terry.
>
I could... If I had the time and no other competing projects.
I'm far from the only one around with a PDP-11 with RX02 or a
microVAX-II with a
R
On 05/04/2017 07:39 PM, Terry Stewart via cctech wrote:
>> And yet, if there were an RX02 somewhere on this VAX, I don't believe
> you'd be able to read them at all... RX02 seeming more likely with a VAX.
>
> Interestingly PUTR, does seem to accommodate this, and the kind of system I
> have set up
On 05/04/2017 06:35 PM, Fred Cisin via cctalk wrote:
> On Fri, 5 May 2017, Terry Stewart via cctalk wrote:
>> Yes, reading them with IMD was one of the first things I tried.
>> Couldn't
>> do it at all. Tons of errors, no tracks could be read. IMD didn't
>> recognise the layout at all.
>> All th
On 05/04/2017 09:05 PM, Terry Stewart via cctalk wrote:
>> The 'RX02' format used by PUTR is actually IBM System 34 format,
>> since DEC's 8" DD disks use a strange combination of SD headers
>> with non-standard ID marks, and DD data fields, that can't be
>> accessed with a standard PC FDC regardle
On 04/29/2017 01:28 PM, Michael Thompson via cctech wrote:
> The RICM just received $1,000 to buy a new oscilloscope. I would like a
> four channel. and color would also be nice. The bandwidth doesn't need to
> be high because we usually work on ancient equipment.
>
> What would you suggest?
>
I us
On 4/25/17 8:57 AM, Paul Koning via cctalk wrote:
On Apr 25, 2017, at 6:06 AM, Pete Turnbull via cctalk
wrote:
On 25/04/2017 10:08, jim stephens via cctalk wrote:
On 4/25/2017 1:39 AM, Pete Turnbull via cctalk wrote:
"Little residue" would be more accurate, and some of that residue
will be
On 4/25/17 6:06 AM, Pete Turnbull via cctech wrote:
On 25/04/2017 10:08, jim stephens via cctalk wrote:
On 4/25/2017 1:39 AM, Pete Turnbull via cctalk wrote:
"Little residue" would be more accurate, and some of that residue
will be water (look up "azeotrope") - plus you need a lot of
alcoho
On 04/25/2017 03:45 AM, ben via cctech wrote:
> On 4/24/2017 1:19 PM, Pontus Pihlgren via cctech wrote:
>> Hi
>>
>> My PDP-8/A is up for restoration. More specifically and 8A100 according
>> to it's ID plate. It is in overall "ok" shape but oh so dusty.
>>
>> I'd like to give it a good cleaning so
On 04/21/2017 10:13 PM, Don North via cctalk wrote:
> On 4/21/2017 6:55 PM, allison wrote:
>> On 04/21/2017 09:34 PM, Don North via cctalk wrote:
>>> On 4/21/2017 4:25 PM, Brian L. Stuart via cctalk wrote:
I've seen suggestion that TU-58s are emulated in simh on
PDP-11s. However, I'm not
On 04/21/2017 09:34 PM, Don North via cctalk wrote:
> On 4/21/2017 4:25 PM, Brian L. Stuart via cctalk wrote:
>> I've seen suggestion that TU-58s are emulated in simh on
>> PDP-11s. However, I'm not seeing it in a show dev and my
>> google-fu is failing me to find any info on how to use it. Any
>
On Apr 13, 2017, at 9:06 AM, Systems Glitch via cctalk
wrote:
> All,
>
> I'm on the virge of making a deal with vintagecomputermuseum on eBay over his
> BYT-8 he's had up for years. It's still overpriced but I can probably sell
> the boards out of it and make it a reasonable purchase. I alre
On 04/12/2017 05:33 PM, Eric Smith via cctalk wrote:
> On Wed, Apr 12, 2017 at 9:55 AM, Sean Conner via cctalk <
> cctalk@classiccmp.org> wrote:
>
>> Yeah, I'm having a hard time with that too. I mean, pedantically, it
>> should be:
>>
>> #include
>> int main(void) { return EXIT
On Apr 12, 2017, at 11:45 AM, Alexandre Souza via cctalk
wrote:
>
That cable had the same connector on both ends and labels! The later version
added a pair
of cables with 5pin connectors. Later they redesigned the EI to work right as
the early
versions were timing critical for the Dram
On Apr 12, 2017, at 11:31 AM, Tony Duell via cctalk
wrote:
> On Wed, Apr 12, 2017 at 3:51 PM, Bill Gunshannon via cctalk
> wrote:
>>
>> So, I just picked up an MISE from Bartlett Labs (cause I really liked
>> the M3SE I had) and decided to revive one of my TRS-80 MOdel I's.
>> In my box of "s
On 04/04/2017 05:32 PM, Richard Cini via cctalk wrote:
> I worked for Radio Shack from about 1982 to 1989 and I remember him from the
> internal RS publication "Intercom".
>
>
> Sent from my iPhone
>
>> On Apr 4, 2017, at 4:55 PM, Ed via cctalk wrote:
>>
>> Bernie Appel, ‘Mr. RadioShack,’ Dies
On 03/31/2017 02:00 PM, Paul Koning wrote:
>> On Mar 31, 2017, at 1:51 PM, allison via cctech
>> wrote:
>>
>> On 03/31/2017 06:32 AM, David Griffith via cctalk wrote:
I'm down to the last few P112 boards for sale and am pondering
another run of them because demand is steady. One of the
On 03/31/2017 06:32 AM, David Griffith via cctalk wrote:
>>
>> I'm down to the last few P112 boards for sale and am pondering
>> another run of them because demand is steady. One of the biggest
>> challenges for the last run was getting the QFP-packaged 100-pin
>> chips[1] in a state such that the
On 03/30/2017 06:01 PM, Brent Hilpert via cctalk wrote:
> On 2017-Mar-30, at 1:13 PM, Noel Chiappa via cctalk wrote:
>>> From: Allison
>>> FYI this is the same problem designers hit with DRAMS back 40 years ago.
>> This didn't ring (pun not intended) a bell for me; can you say a bit more?
>>
Early
ctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Parent
> Allison via cctalk
> Sent: Wednesday, March 29, 2017 11:54 AM
> To: Noel Chiappa; General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: Cross-talk square-wave?
>
>
> On Mar 29, 2017, at 9:40 AM, Noel Chiappa
On Mar 29, 2017, at 9:40 AM, Noel Chiappa via cctalk
wrote:
> Hi, a question about generic analog stuff.
>
> In the process of getting SD cards to work, Dave is seeing square-wave noise
> on a line. (1V of square wave, with pulses about 400ns long, running at
> 375kHz.) The line runs through a
On Mar 28, 2017, at 1:09 PM, Ethan Dicks via cctalk
wrote:
> On Tue, Mar 28, 2017 at 12:35 PM, Henk Gooijen via cctalk
> wrote:
>>
>> Hi PDP-11 game players 😊
>>
>> I found that the famous QIX game was ported to the PDP-11 !!
>> See http://imgur.com/a/gtPfh
>
> I don't know which PDP-11 tha
On Mar 25, 2017, at 5:44 PM, Terry Stewart via cctalk
wrote:
> Re NEC 8201a...
>
> This is a machine I have a lot if fondness for. Wrote many article
> drafts and crunched a lot of numbers on that little unit.
>
> Terry (Tez)
My only wish is the tech manual it is terrible and inaccurate t
On 03/24/2017 04:02 PM, Paul Koning via cctalk wrote:
>> On Mar 24, 2017, at 1:40 PM, allison via cctalk
>> wrote:
>>
>> ...
>> The 68K came in two major forms one was 16 bit bus the other was 8bit bus.
> Isn't that the 68008?
Ah yes. Its still logic
On 03/24/2017 01:19 PM, John Wilson via cctalk wrote:
> On Fri, Mar 24, 2017 at 12:44:37PM -0400, Noel Chiappa via cctalk wrote:
>> So all the DEUNA's I've seen have L10 (ceramic package, 10Mhz) 68K's in them.
>> Has anyone tried using anything else, and did it work?
>>
>> I _assume_ an x12 would w
I felt the poor 8085 CPU was under represented and my Tandy M100 was lonely
so I added a NEC PC-8201A.
The 8201 needed some help to get it going. Things like the foam around
the LCD to front bezel
was turning to powder and regardless of the battery used it was faulting
on low volts (blank scree
On 03/24/2017 12:44 PM, Noel Chiappa via cctalk wrote:
> So all the DEUNA's I've seen have L10 (ceramic package, 10Mhz) 68K's in them.
> Has anyone tried using anything else, and did it work?
>
> I _assume_ an x12 would work, but until someone has acutally tried it...
>
> The Pxx's (plastic packagi
On 3/13/17 12:39 PM, Jon Elson via cctalk wrote:
On 03/13/2017 02:23 AM, David Griffith via cctalk wrote:
I'm almost out of Atmel 29C256 flash roms. I use these primarily for
P112 boot roms. I'd like some more because I still have P112 boards
to sell... and I want them for other projects.
On 03/12/2017 04:56 PM, Systems Glitch via cctech wrote:
>> Are dectape II tapes expensive?
> TU58? They're hard to come by, but the good news is you can *emulate* them
> with a PC and a serial port (or USB adapter). That's how I run XXDP on most
> of my systems, and pretty much all of the system
On 03/03/2017 03:52 PM, Jules Richardson via cctalk wrote:
>
> Just checking here, as someone told me that this is the case, but do
> the Compaq Portable 286 and Portable III take stock 40-pin IDE hard
> drives? I just wanted to make sure that they weren't expecting
> something that might be a bit
On 3/1/17 3:07 PM, Warner Losh via cctalk wrote:
On Wed, Mar 1, 2017 at 1:03 PM, Fred Cisin via cctalk
wrote:
On 03/01/2017 11:14 AM, Charles Anthony via cctalk wrote:
Part of the iconic mainframe experience is the cold room sounds; for
early
On Wed, Mar 1, 2017 at 7:39 PM, Chuck Guzis via cc
On 03/01/2017 01:40 AM, Jim Brain via cctalk wrote:
> On 2/28/2017 2:34 PM, Brent Hilpert wrote:
snippage
> Obviously, given the LM339 issues, this is unworkable in the end, but
> it did get me to realizing some outputs on the LM339, so thanks to
> both of you.
>
> I can plainly see the oscillation
On 2/28/17 1:43 PM, Jim Brain via cctalk wrote:
On 2/28/2017 12:17 PM, Ethan Dicks via cctalk wrote:
It sounds like he is contemplating a battery-powered tape drive
emulator that plugs on the outside of the machine for users to use
without opening their boxes. It would then be portable to other
On 2/28/17 12:56 PM, Chuck Guzis via cctalk wrote:
On 02/28/2017 09:42 AM, Seth Morabito via cctalk wrote:
Synertek used an LM311 (an LM358 would work just fine) to build a
comparator circuit. I _think_ you could use this exact circuit to
take the analog output from the CoCo and turn it into a
On 2/28/17 1:17 PM, Ethan Dicks via cctalk wrote:
On Tue, Feb 28, 2017 at 11:21 AM, allison via cctalk
wrote:
On 2/28/17 10:55 AM, Jim Brain via cctalk wrote:
I have a cute idea for a cassette port project for the Tandy line of
computers (the ones with the cassette port)
Why not just go
On 2/28/17 12:09 PM, Paul Berger via cctalk wrote:
74LS of 74HC gates are not going to work, the signal level is only 1V
the threshold for 74LS is 2V and for 74HC it is 3.7V. I would
probably use something like a compatator or an opamp but I don't have
a circuit handy to use, but tehy should b
On 2/28/17 10:55 AM, Jim Brain via cctalk wrote:
Analog, which is my nemesis, curses me again.
I have a cute idea for a cassette port project for the Tandy line of
computers (the ones with the cassette port). I have a Coco 3 on the
bench, so I scoped the output line while doing 'csave "jim"'.
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