On 07/11/2018 02:53 AM, Adrian Graham via cctalk wrote:
> What temperature oven?
58C +/- 0.5C
--Chuck
On 07/11/2018 11:12 AM, Tom Gardner via cctalk wrote:
> Anyone know where the Step/Direction version of the FDD interface
> originated.
>
> So far as near as I can tell the earliest FDDs (IBM 23FD Minnow and Memorex
> 650/651) used Step In/Step Out. The IBM 33FD Igar used direct control of the
>
On 07/12/2018 11:40 AM, Paul Berger via cctalk wrote:
> Because IBM never sold the drives themselves and the market impact of
> the first Memorex drive may not have been really big, there was no real
> standard so when Shugart Associates released the SA800 its proved to be
> very popular and its
On 07/12/2018 09:05 PM, David C. Jenner via cctech wrote:
> Would Chuck's temperature and Al's oven be appropriate for old magtapes,
> too?
My "cooker" is home-built and heavily insulated. It has a 75W
incandescent for heat and a low-speed fan for circulation. I use a PID
controller to keep the
Interesting. I've got a Micropolis 1115-VI floppy drive with this same
MOS chip, 2 MHz crystal and all--but with a Micropolis ID. Probably not
of any interest to the general hacker public. I believe it manages the
buffered seek on the drive.
--Chuck
On 07/13/2018 02:12 PM, Grant Taylor via cctalk wrote:
> Does anyone have any experience with the GoTEK SFR1M44-U100 floppy drive
> emulator that reads ""images from a USB flash drive?
>
> Good?
> Bad?
> Indifferent?
> Run for the hills?
Yup, got a few of them here. Depends on your needs. If
On 07/13/2018 02:50 PM, Grant Taylor via cctalk wrote:
> I was wondering what images looked like on the USB flash drive. I found
> a couple of pages that talk about the SFR1M44-U100 using it's own
> storage format (that probably doesn't even qualify as a file system).
> I've also found tools and
On 07/13/2018 01:19 PM, Carlo Pisani via cctalk wrote:
> hi
> is there any chance someone has a working gcc-ada compiler? for
> - Linux/MIPS (big endian, MIPS3, MIPS4 or MIPS32)
> - Linux/HPPA2
>
> I have successfully compiled gcc-ada for SGI_IRIX (MIPS4/BE)
> but ... every attempt to create a
On 01/23/2018 08:45 PM, Fred Cisin via cctalk wrote:
> They almost started to catch on, particularly in some PS/2.
> I had one with a MicroSolutions "Backpack" parallel port interface.
It would be a simple matter to upgrade a 1.44M backpack floppy with a
2.88M capable drive, as the controller is
On 01/23/2018 09:27 PM, Fred Cisin via cctalk wrote:
> Being part of the problem, . . . I was very happy in 1991, to finally
> find Windoze 3.0 and 3.1 on CD-ROM, to stop juggling several dozen
> installation floppies.
The last-gasp installation floppies--Microsoft 21-sector DMF
distribution (or
I've got a fellow with a stock of Teac FD235J (2.88) drives and about a
dozen bare Teac FC-1 SCSI boards.
I'm trying to gauge interest--I don't think he wants to sell them
onesy-twosy, but I'm willing to act as intermediary for single-unit
purchases if there is sufficient interest.
--Chuck
On 01/23/2018 08:14 PM, Fred Cisin via cctalk wrote:
> Be aware that you will also need a different controller, or some minor
> modifications.
>
> PC controllers normally support 250,000 bits per second ("360K", "720K"),
> and 500,000 bits per second ("1.2M, "1.4M")
> SOMETIMES 125,000 bits per
On 01/23/2018 04:04 PM, Al Kossow via cctalk wrote:
> There is a clue in the PARC Ethernet Blue and White about this where
> they mention they used CATV technology (where the vampire taps come
> from ) but they don't actually say there that they used 75 Ohm cable,
> terminated at both ends.
On 01/23/2018 09:44 AM, Daniel Seagraves via cctalk wrote:
> One of them scrapped a Symbolics XL for the keyswitches. That would
> be bad enough, but it gets worse - They did because they thought it
> was a CADR "Space Cadet” keyboard.
Really, is this any worse than the gold bugs scrapping whole
On 01/16/2018 10:47 AM, Noel Chiappa via cctalk wrote:
> > From: Jay West
>
> > I'm wary of just sending the tape through the mail for imaging
>
> Why? I sent some tapes out to Chuck to get read, those went by USPS, and no
> problem (well, one had some drop-outs, but they were old
On 1/13/2018 3:24 PM, Fred Cisin via cctalk wrote:
> (I'm unaware of any punch-card attacks, but trojans were possible when
> people used prior subroutines).
Depends on what you mean "attack". CDC 6000 SCOPE had two PP programs
(which could be invoked via user control card).
One was
On 01/13/2018 05:40 PM, Chuck Guzis via cctalk wrote:
> All of this reminds me of a trick that I witnessed on a Model 40 running
> DOS/360. Some guy wrote a chained CCW set with a TIC back to the
> beginning of the list of CCBs that rang the bell on the 1052 operator's
> consol
On 01/18/2018 06:18 PM, Fred Cisin via cctalk wrote:
> A few SCSI floppy drives existed, but they were never very common.
> Only SCSI floppy that I remember having was a "Floptical" (20MB), that
> also handled 1.4M
Most "real" SCSI drives were basically bolt-on adapter affairs to a
traditional
On 03/11/2018 08:19 AM, Al Kossow wrote:
> I've scrapped six of those already. They aren't worth anything.
>
>
> On 3/11/18 1:23 AM, jim stephens wrote:
>> I think this is actually a quad density half inch. If the guy didn't burn
>> it up (says probably 12v fault) it would be
>> handy.
>>
On 03/12/2018 07:44 AM, systems_glitch via cctalk wrote:
> All,
>
> I'm looking for info on a George Risk 771 parallel ASCII keyboard. I've got
> one but no documentation or existing cabling. I'd like to interface it to
> my Poly-88.
>
> Thanks,
> Jonathan
>
Wasn't there something about that
On 02/28/2018 10:55 AM, Paul Koning via cctalk wrote:
> In general, manuals are only a rough approximation of reality. I
> remember an old joke that "PDP-11/x is compatible with PDP-11/y if
> and only if x == y". And sure enough, if you look at the models
> appendix of the PDP-11 Architecture
On 02/27/2018 11:37 AM, Ed Sharpe wrote:
> *In my case lady worked at a warehouse and had her people palate
> and strap the 3 ttys! saved $$ Pack mail is great though to pack
> stuff if no other free reliable option is there. We have to ship a
> large group of computer front
On 02/27/2018 09:29 AM, dwight via cctalk wrote:
> I had a computer item palletized and shipped by Air Freight ( it went
> by surface ). An open pallet will not have things intentionally
> stacked on it. It is possible to have something dropped on it or a
> forklift tine rammed through it but that
On 03/13/2018 08:33 PM, Al Kossow via cctalk wrote:
> There are two gzip'ed files up now of analog digitized 9 track data under
> http://bitsavers.org/projects/9track containing two files of 16 bit
> incrementing
> data patterns blocked 512 bytes/blk and the tach signal from a Qualstar 1260
>
On 03/13/2018 09:39 PM, Pete Lancashire via cctalk wrote:
> comp for 1 - 7/8 IPS like to get all tracks digitized
>
> https://photos.app.goo.gl/IMcgjxugzKMuIvKv2
>
> will put on open file server then sell the tape
>
So, someone with an old Ampex PR-500 deck? I saw one for sale on eBay
a few
During my browsing, I've run across mention of the Emerson "Tape Pac"
2000 series, a half-inch cartridge tape system targeted at
minicomputers, and it seems, the PDP-11.
Here's a mention in IEEE Computer, about the new products at the 1976 NCC:
Is Surplus Sales of Nebraska still in the game?
https://www.surplussales.com/
Here's a 5-year old list of places that Jeff Duntemann created.
https://www.contrapositivediary.com/?p=2726
I remember John Meshna's operation fondly. He had some great stuff.
--Chuck
On 04/05/2018 08:16 PM, Eric Korpela via cctalk wrote:
> I'm not religious, but I consider this a sign of the apocalypse.
>
> I've got bags of stuff I've purchase there (including in its old location)
> that I haven't had time to deal/play with.
It is sad--in the 70s and 80s, the Bay area was
On 04/11/2018 09:31 AM, Eric Korpela via cctalk wrote:
> It might break the rules since it only goes back to 1999, but here's
> Moore's law for integer speed, floating point speed, number of processors,
> memory sizes and disk sizes for the machines connected to SETI@home. Plots
> are averages
On 04/11/2018 12:11 PM, Marc Howard via cctalk wrote:
> If you get stuck you might try athana.com. They have lots of hard/floppy
> disks, including some alignment media. I've used them to rebuild RK05
> media.
>
> A few years back I asked the owner how he stays in business. Two words:
>
On 04/11/2018 11:31 AM, Jecel Assumpcao Jr. via cctalk wrote:
> Besides getting more performance with smaller transistors, we have also
> been increasing performance by taking advantage of more transistors by
> doing more stuff in parallel. So we went from up to dozens of clock
> cycles per
On 04/12/2018 06:23 AM, Diane Bruce wrote:
> Amusingly years ago I worked for Computing Devices Canada that used some
> CDC computers. I was told through a very reliable source that they
> got Unix ported to the Cyber by SoftQuad based in Toronto. They were
> well known as a 'troff house' at
On 04/11/2018 02:48 PM, ben via cctalk wrote:
> I have a nice 18 bit cpu here, with only a few hardware bugs.
> Hmm would it work better if I change that around ideas.
>
> Care to point to a nice 18 bit version of unix or C.
> BTW The cpu has a frame pointer S but no S++ --S operations
> so
On 04/11/2018 06:38 PM, Chuck Guzis via cctalk wrote:
> On 04/11/2018 02:48 PM, ben via cctalk wrote:
>
>> I have a nice 18 bit cpu here, with only a few hardware bugs.
>> Hmm would it work better if I change that around ideas.
>>
>> Care to point to a nice 18 bi
I've found a couple more documents lurking in my desk that I've
completely forgotten about.
The first is a UniSoft Uniplus+ System V User Guide. Circa 1984.
Basically a SysV Unix user's guide. I have no idea what platform this
was intended for, as it's pretty much a generic document. A couple
On 04/20/2018 03:23 AM, Peter Coghlan via cctalk wrote:
> That reminds me of when I phoned IBM here in Ireland looking for software
> support for their VM mainframe operating system not too many years later,
> sometime in the early 1990s. I spelled out every variation of the name
> I could think
On 04/18/2018 09:20 PM, Fred Cisin via cctalk wrote:
>>> I always found it amusing that many programs (even FORMAT!) would fail
>>> with the wrong error message if their internal DMA buffers happened to
>>> straddle a 64K block boundary. THAT was a direct result of failure to
>>> adequately
Really? 64K boundary issues cropping up in MS-DOS?
Egad, that would have been known in DOS 1.0. Certainly, for anyone
writing his/her own low-level disk I/O, it was obvious.
Now, I'll add that if you wrote your own specialized device driver, DOS
did not guarantee handing your driver a buffer
I'm reminded of how fast things have gotten when I use some of my old
media conversion code developed on an 8088 PC, that's been recompiled to
run under 64-bit Linux on a reasonably fast CPU (3GHz quad-core AMD).
I'd sit back for a couple of minutes waiting for the code to churn
through the data
On 04/15/2018 07:25 AM, David Griffith via cctalk wrote:
>
> I'm pondering upgrading the CPU of a Pacccomm Tiny-2 Mk2 radio packet
> controller from a 6Mhz Z80 processor and SIO to 10Mhz parts. My problem
> is that the parts already in it appear to be NMOS. The family is still
> being made by
On 04/15/2018 05:08 PM, allison via cctalk wrote:
> On 04/15/2018 10:25 AM, David Griffith via cctalk wrote:
>>
>> I'm pondering upgrading the CPU of a Pacccomm Tiny-2 Mk2 radio packet
>> controller from a 6Mhz Z80 processor and SIO to 10Mhz parts. My
>> problem is that the parts already in it
On 04/15/2018 04:47 PM, Jay Jaeger via cctalk wrote:
> Yes, the Univac 1100 series were one’s complement (had brief experience as a
> student with 1108 and 1110 from 1969 to 1975)
I thought I'd originally said as much. 9 bit characters with a range of
+/-255 as well as +/- zero.
Here are some
Just noticed this post on the Vintage Computer forum. I don't know a
thing about it:
http://www.vcfed.org/forum/showthread.php?63253-IBM-System-34-5340
--Chuck
On 04/19/2018 07:56 PM, Guy Sotomayor Jr wrote:
> As to why IBM entered the PC market, the rumor was (at least at the time
> within IBM) was that T.J. Watson, Jr. was at an employee’s house and saw
> an Apple II. He said that he wanted to have IBM branded computers in IBM
> employees homes.
How many started coding for a machine writing machine code?
I recall that the IBM 1620 SPS coding forms had two sides--one for
coding assembly (SPS); the other labeled "IBM 1620 Absolute Coding
System". Basically a form with the first 5 positions reserved for the
address, 2 positions for the
On 04/16/2018 06:11 PM, CuriousMarc via cctalk wrote:
> And lifting the sticker reveals the BIOS chip is just a W29C020P-12, a
> regular 256k x 8 Flash memory, 5V chip. Duh. Mystery solved. Of course way
> newer and with many more address lines than my DataIO 29B can read and
> program. Time has
On 04/16/2018 05:35 PM, Glen Slick via cctalk wrote:
> I have only tried using IDA Pro a couple of times. I haven't learned
> how to use it well enough to be what I have used for similar 8-bit CPU
> disassembly tasks in the past. I have just written my own basic
> functionality 8085 / Z80 / 8051
On 04/19/2018 12:14 PM, Fred Cisin via cctalk wrote:
> I have no difficulty admitting that I didn't, and don't, have
> Chuck's level of experience and knowledge. My entire venture into
> microcomputers was a hobby that got out of hand.
It's not so much expertise, but where you start your
On 04/19/2018 05:33 PM, Jim Brain via cctalk wrote:
> Someday, the products and software designed and built by the folks in
> this list will be judged by those who follow us. Possibly the rest of
> you have worked in industries where you were allowed to use new
> solutions, you had ample time to
On 03/27/2018 08:27 PM, dwight wrote:
> I recall at one company we used Micropolous ( SP? ) drives. We had
> almost 100% failure in less than 6 months. It did our company a lot of
> damage.
A lot of outfits (e.g. Sun, HP) used Micropolis drives. Generally, they
were good, but expensive.
Maybe
On 03/27/2018 04:04 PM, Al Kossow via cctalk wrote:
>
> Hitachi 3 and 4tb are VERY good, as are the equivalent Toshiba from when WD
> divested themselves
> of the Hitachi hi-end line.
Hmmm, I haven't actually installed a 1TB drive in any mission-critical
equipment yet--still sitting in
Digging around on the pointer from Al to backblaze, I found this, which,
to me is far more meaningful in terms of presentation of data:
https://hackernoon.com/applying-medical-statistics-to-the-backblaze-hard-drive-stats-36227cfd5372
--Chuck
> Interesting but consistent with my informal observations. My Hitachi
> enterprise class 4gb hdd are still going strong after multiple power
> outages and almost 5 years of 24x7 on time. Granted not much reading
> and writing occurs but the fact that they are spinning is probably
> the biggest
On 03/27/2018 09:19 AM, Ethan via cctalk wrote:
> Yep! I've watched thousand(s) of pounds of working hard drives get
> shredded.
This is nothing new. In the 1970s, the official CDC diktat was to
reduce any surplused equipment to scrap. That included taking a
sledgehammer to disk drives and
On 03/28/2018 10:17 AM, Ethan via cctalk wrote:
>> I know of no RAID setup that can save me >from stupid.
>
> I use rsync. I manually rsync the working disks to the backup disks
> every week or two. Working disks have the shares to other hosts. If
> something happens to that data, deleted by
On 03/28/2018 06:33 AM, Paul Koning via cctalk wrote:
> These are straightforward questions of probability math, but it takes
> some time to get the details right. For one thing, you need
> believable numbers for the underlying error probabilities. And you
> have to analyze the cases carefully.
On 03/29/2018 02:24 PM, Fred Cisin via cctalk wrote:
>>> HOWEVER, a variant of "Boyle's Law" warns that software and content
>>> will expand to fit all available space and speed.
>
> On Thu, 29 Mar 2018, allison via cctalk wrote:
>> We have proof and it is us.
>
> Or, as Walt Kelly ("Pogo")
On 03/29/2018 03:48 PM, Alexander Schreiber via cctalk wrote:
> Also, AFS is built around volumes (think "virtual disks") and you have
> the concept of a r/w volume with (potentially) a pile of r/o volumes
> snapshotted from it. So one thing I did was that every (r/w) volume
> had a directory
On 03/26/2018 11:23 AM, Mazzini Alessandro wrote:
> Well, but with dban and/or other certified software the drives are as well as
> new. The only issue would be the time/cost to sanitize them in house.
Certainly, but it's fruitless to use logic in cases such as these.
Chances are that someone
On 03/27/2018 09:19 AM, Ethan via cctalk wrote:
> I have a hook-up to get some older drives from another company (1.5TB,
> etc) and well... let's just say that "newer" used disks with 4 years on
> them aren't very reliable. I'd imaigne the older ones hold up much
> better since they were more
On 03/28/2018 05:03 AM, Bill Gunshannon via cctalk wrote:
> I have ancient Micropolis and Miniscribe disks here that still
> work great. Seems every company went thru at least one
> model that was trash. The worst from my experience were
> IBM disks made in Thailand.
Were there ever any *good*
On 03/25/2018 07:32 PM, Guy N. via cctalk wrote:
> The new sysadmin at work is clearing out closets full of junk^H^H^H^H
> cool old stuff accumulated by the previous sysadmin. There's a big
> carton full of PATA hard disks. Most of them are in the 4.3 GB - 20 GB
> range, a few larger, a few
On 03/26/2018 12:26 PM, et...@757.org wrote:
> AFAIK there has been a bounty out to recover data with a single wipe
> that hasn't been collected. I thought it was all theory and never done
> in practice?
Here's the Gutmann paper that many people cite:
On 03/26/2018 01:26 PM, Fred Cisin via cctalk wrote:
> I just stumbled on a DTC3250, & "Installation Guide"
> 8 bit ISA SCSI + 4 floppy
>
> Firmware: "GSH53A"
>
> The floppy interface MIGHT work for HD on a 5150/5160?
> (with appropriate software)
>
> Condition unknown
>
> Anybody need one?
This is in Eugene, OR. I received the following email on the local
Freecycle-type list:
I have all of the "Lane County Commodore Users Group" (LCCUG) inventory
including (but not limited to) the following :
Keyboards, one
On 03/03/2018 12:58 AM, Ed Sharpe via cctalk wrote:
> OK or may have been a magnetron... but not a cavity magnetron I
> gave a 30s radio news as I remember had magnetron.. but not cavity
> one.. I was confused by it at the time, but someone older explained
> it to me OK see some
I dunno about these historical accounts.
I was watching a PBS program about RADAR and the magnetron was made out
to be a super-secret device, yet there's a clear explanation of it in my
1942 "Radio Handbook".
--Chuck
On 06/28/2018 01:42 PM, Eric Smith wrote:
> On Thu, Jun 28, 2018 at 2:20 PM, Chuck Guzis via cctalk
> mailto:cctalk@classiccmp.org>> wrote:
>
> So, on a TIA/EIA/RS-232C DB-25 connector, what's the official position
> on pin 1? The standards calls it PGND = Prote
On 06/27/2018 04:19 PM, Antonio Carlini via cctalk wrote:
> No idea. But on thickwire the taps were all supposed to be made at
> specifically marked positions (for the reason given earlier).
> Perhaps someone (incorrectly) thought that the terminator should also be
> at such a position and so a
On 06/28/2018 09:45 AM, Eric Smith via cctalk wrote:
> Of course, this isn't specific to Ethernet. It can happen with e.g.
> TIA/EIA-232 (formerly RS-232) as well, and in fact that is even more common
> in practice, because Ethernet is transformer-isolated at each station, but
> TIA/EIA-232 is
On 10/18/18 9:56 PM, jim stephens via cctalk wrote:
> The sides are not square like any Imsai I saw, and there is a monitor on
> top, which is also in a slope case. I don't recognize it, but as I said
> the Altos look like one of the 58x (I think) looks similar.
Don't think so---the trapezoidal
On 10/21/18 7:12 PM, Ken Shirriff via cctalk wrote:
> Someone pointed out this CDC disk drive on Craigslist in the Washington DC
> area:
> https://washingtondc.craigslist.org/mld/zip/d/early-computer-era-rolling/6728728220.html
>
> I have no connection to this, and don't know anything about it,
On 10/22/18 11:28 AM, Peter Van Peborgh via cctalk wrote:
> I would be interested in any Rolm items you might have. (no promises.)
My wife had a job as a temp at Rolm. I think we have a Rolm frisbee
that our dogs play with.
--Chuck
On 10/19/18 9:55 AM, ED SHARPE via cctalk wrote:
> well i have some clicky keyboards and yea love the feedback clak
> when I type but the usual off the rack frys usb thing is problematic
I've got a bunch of Model Ms scattered around here. I remember when
Surplus Software in
On 10/19/18 11:14 AM, allison via cctalk wrote:
> On 10/19/2018 01:23 PM, Chuck Guzis via cctalk wrote:
>
> Me I had M keyboards in the day, thought they sucked! Vt100 and VT220
> early version
> were my measure. None of them made me type better!
I will confess to a fondness
On 10/17/18 11:10 AM, Paul Koning via cctalk wrote:
> The 1/2 inch tape drives I'm familiar with incorporate such a device.
> Typically it's a ceramic thing, so it looks like a small shiny white
> rectangle near the heads. It has to be scrubbed clean periodically
> when it gets brown from
On 10/24/18 5:36 AM, Paul Koning wrote:
>
> Very different. PPUs are real computers, vaguely like a PDP-8 in
> fact but quite fast. The PPUs have major roles in the OS throughout
> the 6000 series, not just in early versions.
You obviously haven't spent much time in SSD (Special Systems). I
On 10/24/18 11:22 AM, ben via cctalk wrote:
> Am I really, every thing is so backwards compatable with the classic
> PC's I don't see much new other than what was hacked on.
> I am dealing with archiecture model here, the real hardware don't matter
> anyway. If it takes X cycles to read memory,
On 10/23/18 3:29 PM, Torfinn Ingolfsen via cctalk wrote:
>> FreeBSD may not have the installed base of Linux but it has a its fans.
>
> Yes, this workstation runs FreeBSD 10.4 and Xfce.
I prefer OpenBSD myself for mission-critical stuff--the nearly paranoid
attitude to new software is unusual
On 10/23/18 1:09 PM, ED SHARPE via cctalk wrote:
> dunno what being a gamer has to do with it working or not...
It's always seemed to me that gamers use/abuse keyboards more than those
of us who simply use them to type.
Maybe that's a mistaken impression.
--Chuck
On 10/24/18 8:06 PM, Jon Elson via cctalk wrote:
> Hmmm, you COULD actually use a schematic tool to do this! Maybe create
> the components to look like DIPs. I know I could do this in Protel 99
> without a great deal of trouble. Then, just draw in all the wires.
> I suspect a few other good
What's Microsoft's policy on old MSDN CDs? I've got a ton of them
starting somewhere around 93-94 and extended through the XP years.
Do I respect MS's IP and send them to the crusher?
--Chuck
On 10/29/18 2:09 PM, Electronics Plus wrote:
> Not required, I think. There are activation codes for SOME of the
> software on the CDs, but not most of them. Many will be trial
> versions or limited in some fashion. All of this old software is no
> longer under MS support, and much of it can be
Gee, I didn't know you collected old CD archives.
I've got some WC CDs here:
"Internet USENET source code." CDs 1,2,3
C/C++ Users Group Library August 1997
"Toolkit for Linus"-2 CD set.
---
Developer Source Vols. 4-10 (1995-1998); archives of source code
published in magazine
On 10/31/18 5:40 PM, Bill Gunshannon via cctalk wrote:
>
> My previous employer was in MSDNAA. We got rid of
>
> all out of date CDs and when they went to downloading
>
> we had no CDs left. The rules require that the CDs be
>
> protected when in out possession and be destroyed
>
> when
On 10/31/18 5:09 PM, Fred Cisin via cctalk wrote:
> Since there is nothing on them that would identify you, there are a
> number of people who would gladly help you to properly dispose of them.
I wonder how many MSDN subscribers held onto the betas and release
candidates of various products;
Anyone interested in three hardbound volumes of ACM CALGO, starting with
Algorithm 1, plus a large looseleaf binder and
assorted microfiche (assuming that I can still find them)?
Drop me a line if so.
--Chuck
On this subject, is there no interest in serial ALU designs? At one
time, if you wanted a low-cast implementation, that was the way to do
it. Also gives you a leg up on variable word-length designs.
Didn't at least one of the more popular MPU designs employ a serial ALU?
TMS9900?
--Chuck
On 10/25/18 11:33 AM, Al Kossow via cctalk wrote:
>
>
> On 10/25/18 10:45 AM, Chuck Guzis via cctalk wrote:
>
>> Didn't at least one of the more popular MPU designs employ a serial ALU?
>> TMS9900?
>
> You've mentioned this a couple of times.
>
> Are you
On 10/25/18 12:15 PM, allison via cctalk wrote:
> The 1802 is claimed to be serial.
Ah, that was it. Ultra-low power (for the time) CMOS. Simple
instruction set.
Thanks,
Chuck
On 10/25/18 11:06 AM, Jim Manley via cctalk wrote:
> Obviously, he returned to academia before the project collapsed in a heap,
> and he might have had to scramble and compete with other departing CS PhDs
> (who would also have hung around too long). Many would probably be looking
> at another
On 10/25/18 11:53 AM, Al Kossow via cctalk wrote:
> There is the moto MC14500
>
> http://bitsavers.org/components/motorola/14500/MC14500B_Industrial_Control_Unit_Handbook_1977.pdf
No, not the ICU--it'd be a real stretch calling it a computer.
It'll come to me at some point.
--Chuck
On 10/25/18 12:04 PM, Al Kossow via cctalk wrote:
>
>
> On 10/25/18 12:02 PM, Josh Dersch wrote:
>
>> You might be thinking of the AMT DAP, which used arrays of 1-bit processors.
>
> yup.
>
> I know we have one, just can't find it in the CHM catalog
> I have some docs on bitsavers
Danny
On 10/26/18 6:10 AM, Gordon Henderson via cctalk wrote:
> However it was a royal PITA to code for although a 32-bit CPU, it would
> read memory 64 bits at a time (actually 128 IIRC to satisfy the cache),
> with half that 64-bit word being an instruction for the integer unit and
> half for the
On 10/27/18 4:51 PM, corey cohen wrote:
>
>> On Oct 27, 2018, at 7:42 PM, Chuck Guzis via cctalk
>> wrote:
>>
>>> On 10/27/18 4:19 PM, Al Kossow via cctalk wrote:
>>> Has anyone seen a source for these clips?
>>>
>>> http://bitsavers.org/
On 11/1/18 5:40 PM, ED SHARPE via cctalk wrote:
> somewhere we have a bunch of ISA cards that are like the
> ports on my hp time share system just not 16 ports...I seem to
> remember between 4 and 8... and they were for a PC type
> machine of course with the ISA ports.
On 11/1/18 11:28 AM, Grant Taylor via cctalk wrote:
> On 11/01/2018 12:22 PM, Fred Cisin via cctalk wrote:
>> A modem,
>> serial mouse,
>> serial printer,
>> serial "RS232" scanner, external drive (yes, they existed), serial
>> control of CD cchanger (consider Kubik 240 disc carousel (SCSI, but
>>
Dunno. I'd say that the CDC 6000 seies machines had pretty good code
density, and of course, ran like the wind.
Instructions are 15 or 30 bits and no condition codes to preserve. Most
are 3-address.
And a very simple instruction set.
--Chuck
On 10/23/18 5:34 PM, ben via cctalk wrote:
> With NO GUI and hidden IO, you get speed.
I understand what GUI is, but what's "hidden IO"?
--Chuck
On 10/23/18 6:10 PM, ben via cctalk wrote:
> The 10 or so PPU units.
> Ben.
Early SCOPE and COS also put the operating system in those, leaving the
CPU for real work. But for I/O, not that much different from IBM
"channels", no?
--Chuck
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