It is unlikely that no current day OCR will produce an error free listing.
It is possible to train an AI to do this but it requires specific training. It
must be on the specific machine code and on the same format. Any generic OCR
will have many errors if the text is hard to read.
The final produ
ng to see
what alternate values did to the execution of the code. It was over 3K of code.
Quite a bit for a 4004. It was intended to be loaded into 13 1702A Eproms.
There were over 30 points in the code that needed to be resolved.
Dwight
From: cctalk on behalf of
I hope you are not thinking it would test an Intel 4004 or a 8008? That would
be a stretch. For the 4004, there is only a narrow range of frequencies it runs
under. I'm not that familiar with the 8008 but suspect it has similar
restrictions. Both use dynamic registers. Both use PMOS voltage leve
The dies look to have consistent wire bonding. That would mean they are one of
the standard EPROMs made by Intel, just preprogrammed by Intel before shipping.
The numbers wouldn't be intel numbers they would be IBMs inventory numbers. My
guess is that they are 2732s. You might use a microscope a
wight
From: cctalk on behalf of Paul Berger via
cctalk
Sent: Monday, March 21, 2022 5:19 PM
To: dwight via cctalk
Subject: Re: ID UV erasable PROMS used on an IBM PC board?
They won't be 2732 as the EPROM in the picture has 28 pins, but 2732 is
a 24 pin package 2764, 27128,
It is true that the glass blocks most of the UVC from florescent lamps. The key
word here is "most". It is not a 100% block.
When looking at aged data in EPROMs one should error on the side of caution.
As an example, I have a pole lamp that I use a standard florescent bulb, with
the typical spira
Years ago when I was at Intel, they would take EPROMs that had only a few
defects and attempt to program them with specific applications. They would then
usually paint the window black and put on that particular product number. When
we needed EPROMs in the lab, we would take a pile of these that
I've been getting a bunch of "release of lien waiver"
messages lately.
I've not been opening the click bate. I'm just wondering if anyone else is
getting them.
I don't know what nasty is attached as I don't have a secure system to look at
it.
Dwight
have no
idea what's attached, simply because I have no interest in investigating the
machinations of criminal elements on the net.
paul
> On Apr 14, 2022, at 1:47 PM, dwight via cctalk wrote:
>
> I've been getting a bunch of "release of lien waiver"
> mes
Sometimes the IC has been installed with the pins under tension. This is
typical of machine inserted ICs. When the solder is loose, bend the pin away
from the side it is pressed against. Do this carefully, don't over bend. You
want it to center in the hole. I recommend doing this with a separate
Once the corrosion is removed I recommend using DC-4 on the connections. It
will protect the surfaces and keep great electrical connections. It is a
silicon grease that is non-conductive but keeps the surface clean and improves
metal to metal electrical contact. It doesn't allow oxides to build
Yep. I didn't know it was now made by someone else. Also look at McMaster-Carr.
You might get a better price.
Dwight
From: Ali
Sent: Saturday, April 30, 2022 3:23 PM
To: 'dwight' ; 'General Discussion: On-Topic and Off-Topic
Posts'
Subject: RE: cleaning up edg
Hi All
There was a Nicolet computer purchased recently on ebay:
https://www.ebay.com/bfl/viewbids/363826255294?item=363826255294&rt=nc&_trksid=p2047675.l2565
Looking at the buyers history, it looks like it was purchased by a collector.
Bob Rosenbloom and I are wondering if anyone know who might ha
t. It is on his list of projects.
Dwight
From: Paul Koning
Sent: Thursday, May 12, 2022 10:15 AM
To: dwight ; cctalk@classiccmp.org
Subject: Re: Recent purchase of NIC-80 computer.
> On May 12, 2022, at 1:03 PM, dwight via cctalk wrote:
>
> Hi All
> T
It may have a processor inside. if it is the one I think it is, it uses 2900
ALUs.
If you can send a picture I may be able to tell.
Dwight
From: cctalk on behalf of dancohoe--- via
cctalk
Sent: Thursday, May 12, 2022 1:45 PM
To: 'dwight via cctalk'
What ever you do, don't use a Fairchild part. When I worked for Intel in the
80's, we finally band using Fairchild for any latching device. They failed on
pullup current, even when the parts were sent back and they claimed they were
good. We just gave up on them, we couldn't hold production whil
I'm relatively sure PL/M was written by Gary Kildall.
I believe it was originally used on minis ( not sure which one ) but was later
ported to the 8080 under ISIS. One might notice the similarities of ISIS to
CP/M.
Dwight
From: cctalk on behalf of Chuck Guzis vi
Maybe it is on a size reduction.
Dwight
From: geneb via cctalk
Sent: Saturday, August 20, 2022 7:47 AM
To: Liam Proven via cctalk
Cc: geneb
Subject: [cctalk] Re: "Revival" of a dedicated Micropolis webpage on internet
On Wed, 17 Aug 2022, Liam Proven via cctalk
When punching holes in the envelope I've always had a piece of thin cardboard
between the back of the punch and the disk. I've never had a problem this way.
I damaged a disk once with the punch and the lesson was learned.
You just cut the cardboard to slip conveniently in the center hole, between
Disk compression gone wrong.
I had a number of files from a hard drive to save to floppies. Even compressed
it took 3 floppies.
Al was fine until one night, I was carrying the box of these and other floppies.
As I got out of the car, I dropped several disc and before I could stop, my
foot came do
If all you want is a mass storage, you can do what I did for my NC4000 computer.
I took a controller board from an XT and a ST506 drive( only 5 Megs but how am
I going to create
that much myself.
It is better than a floppy controller since it buffers a sector. The computer
can run as slow or fast
I took typing in summer school before high school freshman. After 2 weeks I was
at 20 WPM. At the end of the semester, I was at 20 WPM. đ
I have since resorted to index and thumb on both hands.
Dwight
From: Rick Bensene via cctalk
Sent: Friday, January 27, 2023 1
I'm assuming that the 286/20 is a series II type with monitor built in?
If so, it has a single density floppy controller built into the IOC board.
You didn't post any pictures so I can't tell if there is a controller set
there. Until I left Intel,
all the disk controllers were a two board set. One
It is unlikely that a 6 bits in a byte will fail, caused by a RAM, since each
RAM chip is only one bit, not a byte.
It is more likely that one of the ROM chips is being doubly decoded. Since
these are decoded as 1 K blocks, it is likely a problem with the address block
decoder, the 74LS145.
Just
Is there any load resistance at the end of the line?
Dwight
From: cctalk on behalf of Noel Chiappa via
cctalk
Sent: Wednesday, March 29, 2017 6:40:22 AM
To: cctalk@classiccmp.org
Cc: j...@mercury.lcs.mit.edu
Subject: Cross-talk square-wave?
Hi, a question abo
270K is not a transmission line load.
As I recall ribbon cable is around 100-150 ohms
impedance some place.
The signal does look nice and square.
I doubt is is inductive coupling, with that high a
load, I'd say it was capacitive.
inductive coupling requires current flowing.
Dwight
fed.org/forum/showthread.php?55171-PDP-8-e-Project/page6 )
Anyhow, I dunno. My jury is still out on this one.
Eugene
-Original Message-----
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of dwight via
cctalk
Sent: Wednesday, March 29, 2017 8:33 PM
To: Al Kossow; General D
I didn't look clearly at the trace but it could also be
a reflected un-terminated line and not cross talk.
Dwight
From: cctalk on behalf of Chuck Guzis via
cctalk
Sent: Thursday, March 30, 2017 1:59:00 PM
To: General Discussion: On-Topic and Off-Topic Posts
S
I'd also like to have the board. I have a board with a NC4000 but never managed
to get a RTX-2000.
One might say the NC4000 was the prototype for the RTX-2000.
The RTX-2000 could run applications several times faster than the same
applications on a X86 machine of the time. They were often used
I know most don't get it but I like Forth because it is easy to follow the
program flow and easy to test. C has too much boilerplate to solve the problem
of not being able to use white space to keep things organized.
One uses Forth like a combination assembler and high level language. Most all
To my knowledge, there is only one person that claims to
have a cartridge for the APL on the VideoBrain. He considers it
more valuable than gold and won't let anyone look at it or
dump its contents.
Such code running on a VideoBrain would surely warrant the /S
label for "Small".
Without some
I have a tiny APL that was written for the 8080 someplace.
It has input that use ASCII keyboard input instead of the
funny characters.
I played with it a little on my IMSAI. The fellow had hand
written and assembled it by hand.
Not something I'd ever like to do.
I make to many simple mistakes
Hi Tez
You where lucky. You had a format that was more or less standard. I have disk
done in formats that are not so common.
One was a real toughie. I had some 5.25 and some 8 inch hard sectored disk in
MFM format. These were for the Polymorphic machines. I'd modified a Polymorphic
8 inch co
Some times it reads part of the disk. I don't know what it is looking at but it
won't format over some types of original data. I've often erased with supper
magnet to get past such stuff.
It may also be that is just doesn't support 77 and can only do 80 tracks.
Dwight
Heat damage can cause a fold or wrinkle as well.
Many format programs don't look at the index anymore as it isn't important for
reading the disk. It is only used to indicate that the disk is turning.
That is why you see it moving each time you reformat. It is the same place on
the disk surface.
I'll have to give mine a look. I hate that foam.
Dwight
From: cctalk on behalf of Al Kossow via cctalk
Sent: Friday, April 28, 2017 9:00:28 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Diablo 3x pictures
Was working on some Drives this wee
If it is your only scope I recommend an analog scope of at least 100 MHz, with
dual trace and delayed sweep.
If you already have an analog scope, I recommend a logic analyzer instead of a
digital scope.
If you already have both above, I recommend a digital scope.
Dwight
_
Aren't these water cooled?
I seem to remember hoses.
Dwight
From: cctalk on behalf of Dave Wade G4UGM via
cctalk
Sent: Monday, May 1, 2017 9:48:52 AM
To: 'Guy Sotomayor Jr'; 'General Discussion: On-Topic and Off-Topic Posts'
Subject: RE: IBM 4331 Mainframe
>
Why do you ask?
Dwight
From: cctalk on behalf of Ken Seefried via
cctalk
Sent: Tuesday, May 2, 2017 8:28:59 PM
To: cctalk@classiccmp.org
Subject: AB "Multibus"?
Are Allen-Bradley Multibus-1 form factor cards actually Multibus
compliant or something proprietary
Rtty was fsk. You needed a scope or a needle to
indicate when the BFO was centered.
That would be tuning.
I think the Wiky was talking about the 101 standard, not
the hardware.
One wonders what all the terminal strips were for.
Maybe more phone line or you could connect to more
TTYs
Dwight
I would guess the lower voltages are generated from
a switcher off the 85 or 42 volt lines.
First check with an ohm meter in those lines to look for
a dead short.
Dwight
From: cctalk on behalf of Philipp Pap via
cctalk
Sent: Tuesday, May 9, 2017 6:26:43 AM
I don't believe the AIM-65 normally does color??
Dwight
From: cctalk on behalf of Kyle Owen via cctalk
Sent: Thursday, May 18, 2017 10:08:32 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Commercial AIM-65 Video Controller?
Any idea what thi
I was looking at an old GI catalog and casually noting the CP1610 that was most
of a PDP11 processor. I did some more web surfing and noticed that the
Intellivision game machine used this chip. It just never dawned on me that they
used this processor.
I see that one could even get a keyboard fo
Such things were often done on loyalty to previous companies.
It is like the Video Brain used the F8 or that Olivetti used the Z8000 for the
M20.
The Video Brain was because the designer had worked on the F8 at Fairchild.
The M20 was because Faggin was Italian and had connections to Olivetti.
If you look on the ebay for a dolch ethernet sniffer, you'll see
many with no keyboard.
Why would someone separate the keyboard from a box when it
is clipped onto it?
These are not just any keyboard. They have custom shaped cases
and connector specifically for that model dolch.
What would any
If you still have a MAC plus handy you can experiment
by making short programs and viewing them in hex.
You can build up a translation dictionary that way.
I've done that for other Basics in the past.
You show 16 bit values, be careful they are sometimes
byte swapped. The original encoding is
This is more like DRAM. There are bit lines and word lines.
All the address decoding is done outside the array.
No X Y partial addresses.
Instead of having one plain for each bit, the bits are all in the single plane.
Dwight
From: cctalk on behalf of Christia
Ok, this will be a tough one.
I've located a Sparcbook 1 technical manual. It has a lot of good
information in it with schematics for the electronic.
It seems to be missing schematics for the power supply in
it. This takes the single input and creates all the other
voltages, like +-12V and suc
14, 2017 5:12:21 PM
To: cctalk@classiccmp.org
Subject: Re: Sparcbook 1
I'd love to get what you have with the remaining schematics and
technical info.
I don't have any such documentation right now or where to find any online.
thanks
jim
On 6/14/2017 4:44 PM, dwight via cctalk wrote:
I like the Elgin clock module. I didn't know they made electronic time pieces.
I'd guess the board is a clock generator.
Dwight
From: cctech on behalf of william degnan via
cctech
Sent: Friday, June 16, 2017 10:02:18 AM
To: Jon Elson; General Discussion: On-
If you want to mess with a F8, get your hand on a VideoBrain.
There is a group that has a lot of information as well.
Dwight
From: cctalk on behalf of Mark Linimon via
cctalk
Sent: Friday, June 16, 2017 7:07:03 PM
To: ste...@malikoff.com; General Discussion:
The board in the bottom center is 6 buffers or inverters.
The upper right is 4 flipflops. The upper right is some type
of decoder( maybe an address or something ).
The bottom right is a clock generator and the one on the
lower left looks to be a massive gate, nor or nands depending on the logic
oops. the 4 flops are upper left.
Dwight
From: dwight
Sent: Friday, June 16, 2017 9:31:15 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Unknown boards
The board in the bottom center is 6 buffers or inverters.
The upper right is 4 flipflo
Sounds like Bob Rosenbloom.
Dwight
From: cctalk on behalf of Connor Krukosky via
cctalk
Sent: Friday, June 23, 2017 5:55:53 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Free HP 9836 in Santa Cruz, CA
I am in no way affiliated and wish it w
This is often called "The Information Era".
I've always called it "The Information Lost Era".
You may quote me.
Why the NASA person said to immediately destroy the tapes, one can only guess.
Those tapes belonged to the people of the USA. They were not some single
persons option to destroy. We
Now, if someone would just send me a Combitron, I could figure how to make it
play pong on a scope.
The delay lines are serial, it was clever to use it to hold a video image.
One wonders what it would do if it tried to execute it?
I don't even care if someone sends me a NCR Combitron. I'm not t
You can't remove pitting. You mean remove the dark oxide?
Dwight
From: cctalk on behalf of Rob Jarratt via
cctalk
Sent: Wednesday, July 19, 2017 12:52:44 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Removing Pitting and Rust From an Enclosu
I have a system that uses hard sectored disk( 8 inch 32 sectors ) but only used
two sectors 16 sector holes long.
I understand that the Wang systems used hard sectored with the holes around the
outside of the disk.
There is more than size that is strange.
Dwight
_
I wouldn't expect the cogged belt to work well.
The teeth would still cause jumps.
Now, if you came up with a way to grind the teeth off.
That might work.
Dwight
From: cctech on behalf of Craig Ruff via cctech
Sent: Sunday, July 23, 2017 8:45:41 AM
To: cct.
I wonder if they can be reset by just removing the bias magnets.
The bias field is needed to maintain the domains in the material.
Of course, that might make them totally useless.
Dwight
From: cctalk on behalf of Al Kossow via cctalk
Sent: Sunday, August 6,
It's over now.
I came away with about 3 times as much stuff as I when with.
I've not seen any photos posted yet.
For those that do post photos I recommend adding
xiiw as a single word. It will make searches easier.
Dwight
From: cctalk on behalf of Ed via cct
And the bidding has gone wild!
Dwight
From: cctalk on behalf of Rob Jarratt via
cctalk
Sent: Friday, August 18, 2017 4:13:56 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: This Is Such An Exciting Listing!
http://www.ebay.co.uk/itm/182707649
These are notoriously bad. Most radio repairers replace them without even
measuring them to see if they leak.
"black beauties"
Tinker Dwight
From: cctalk on behalf of Jon Elson via cctalk
Sent: Friday, August 18, 2017 8:59:26 PM
To: couryho...@aol.com; gene.
The regulator needs about 2.5 to 3 volts head room. The circuit is what is
often called a boost circuit. If my calculations are right, it should produce
about 15.5 to 16V on C10. This gives the regulator enough over voltage to work
as a regulator. If the supply you have is not regulated it won'
They would have electrolyte in them. It is mildly corrosive as it is mostly a
borate solution. You can drill a couple holes in the tops of the case and drain
them.
Since you say you've unsoldered the bases, are they wire or snap in. If snap
in, you must get the lead clear of any solder touching
Mostly a bunch of picked over junk.
Enough said.
Dwight
From: cctalk on behalf of Dennis Boone via
cctalk
Sent: Monday, September 4, 2017 6:07:10 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Odd Ebay auction showed up today...
> Yeah,
Hi Eric
It is vintage-computer-store
Dwight
From: cctalk on behalf of Eric Christopherson
via cctalk
Sent: Tuesday, September 5, 2017 8:58:16 AM
To: Robert; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Odd Ebay auction showed up today...
On
The seller is in business. Old computers seem to be the target. They do not
seem to have much computer knowledge. They seem to be a member of VCF and such
as a business would be that sells such items. anyone can be a member They
periodically change their seller name. They don't seem to be inter
Were does the powerup signal go?
Dwight
From: cctalk on behalf of Adrian Graham via
cctalk
Sent: Wednesday, September 27, 2017 5:23:45 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Strange grounding problem
Hi folks,
This is another Grundy
One wonder how many SW hams were active in the Caribbean. Most hams today seem
to be into 2 meter and not so much long range SW.
I would suspect it was still quite important.
As a fun project, a number of years ago, I used a modem card with a DSP chip to
decode radio weather fax. I used to DSP
You can not fix anything without knowing what it is suppose to do. Chuck's idea
is sound. You will not likely get much with the logic analyzer unless the
processor is actually running some code.
It doesn't sound like it is. You need to check that it is.
Dwight
__
Since you know the pinout of the SIO chip, you might first look to see if where
the rx and tx pins go. This may require some hunting with an ohm meter. I'd
suspect they go to a RS232 level shifter.
You may also have to write some code to run the serial chip and any possible
external loopback. A
misbehave as well. Just
because it passes some times doesn't mean it is good enough to run programs.
Dwight
From: cctalk on behalf of dwight via cctalk
Sent: Tuesday, October 17, 2017 4:08:46 PM
To: Dominique Carlier; General Discussion: On-Topic and Off-
I don't see why you have assumed that one of the capacitors has leaked. The
corrosion could have come from water or condensation onto the board.
I don't see any corrosion on the components.
Dwight
From: cctalk on behalf of Rob Jarratt via
cctalk
Sent: Monday
I would remove the transformers before putting it in the wash.
The big one doesn't look to be hermetically sealed.
Dwight
From: cctalk on behalf of Phil Blundell via
cctalk
Sent: Monday, October 23, 2017 3:27:29 PM
To: r...@jarratt.me.uk; Rob Jarratt; General
Most real lock smiths can make a key for it. Just remove the lock and bring it
to them.
Dwight
From: cctalk on behalf of Ed via cctalk
Sent: Friday, October 20, 2017 8:24:28 PM
To: jw...@classiccmp.org; cctalk@classiccmp.org
Subject: Re: HP 21mx/whatever proc
One caution for 4164s. When they first came out, there were some that were 256
cycle refresh and others that were 128 cycle.
There is no way by looking at them to tell which is which other than getting a
matching original manufacture document.
Many machines expect 128 cycle. You can use 256 cyc
Nice chart Chuck.
Dwight
From: cctalk on behalf of Chuck Guzis via
cctalk
Sent: Saturday, October 28, 2017 10:19:53 PM
To: dwight via cctalk
Subject: Re: NEC 4164-12
On 10/28/2017 10:14 PM, dwight via cctalk wrote:
> One caution for 4164s. When they fi
Look at Dr Dobb's August 1979. There is an article on computer crime. It is
interesting how times have changed.
Dwight
It was interesting, going looking at some of the youtube videos from some of
the inventors.
It seems that the only reason it didn't have a machine writable program memory
was cost.
It had the ability to do conditional flow and used an instruction decoder.
Previous computers were patched pieces
Why not just measure the voltage across the resistor. That will tell you the
amount of current flowing.
Dwight
From: cctalk on behalf of Brent Hilpert via
cctalk
Sent: Tuesday, November 14, 2017 6:29:47 PM
To: General Discussion: On-Topic and Off-Topic Posts
Could be the zinc plating?
Dwight
From: cctalk on behalf of Sam O'nella via
cctalk
Sent: Friday, December 8, 2017 2:46:40 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Types of corrosion on computers
I've seen rust and dust, but there's an
If it were a 5.25, I'd say it was the floppy sticking in the jacket.
Dwight
From: cctalk on behalf of allison via cctalk
Sent: Sunday, December 10, 2017 4:26:24 AM
To: Brent Hilpert via cctalk
Subject: Re: Epson PX-8 specifically TF-10 problem...
On 12/09/201
When I was at Intel, years ago, I recall the baking was only to repair the
retention of the EPROMs. It was not to fix random failures.
It sounds like your EPROMs have various failures that wouldn't be helped by
baking.
Each time the EPROM is programmed, there is a slight increase in the leakage
I would avoid baking them until you have exhausted other
>> options. Not sure what others think. This topic has come up before
>> here,
>> about putting them outside and all that. The erasers are all over ebay,
>> and the hardware store is full of the correct types of l
When I had access to a wire bonder, we took EPROMs that had been plugged in
upside down and removed the lids. We'd see a blown wire and replace it.
On several of these parts we found that 100% worked. So it would seem that no
silicon damage was done, just the bonding wire was blown like a fuse.
Hi Bill
I don't have one handy but you need to state how your SIO card is configured.
The one I have, has a number of jumper options. I think we'd need to know the
options for which bits are used for which.
Dwight
From: Bill Degnan via cctalk
Sent: Sunday, July
My Poly-88 should be working but I've not played with it for a few years. The
last time I had it up and doing something was at the last MakerFaire .
What Is your issue?
Dwight
From: Steve Lewis via cctalk
Sent: Thursday, August 3, 2023 10:19 PM
To: General Discus
I do understand the warranty sticker. Say we have the average computer buyer.
He has a screw driver and mostly knows how to use it. He also went to Radio
Shack ( long gone đ ) and bought a cheap soldering iron. He is now fully
equipped to repair what ever is wrong with his box. ( obviously not a
My first computer was a Poly-88. I had no monitor and no keyboard.
I read and understood the instructions about finding a TV that used a
transformer power supply. Many newer TV's of that day were not using a
transformer for the main supply. I went to several secondhand stores and found
one that
I like OSHPark. They are not the cheapest but they also would drill tightly
spaced feed thru's that I could pass wire wrap wire through ( uninsulated ). I,
also, didn't need to create Gerber files for drilling ( always a possible
source of errors from a past place I worked at ).
I used KiCad.
Th
I have an older one and it seems like, I recall, openboot has a name for the
nvram. possible caMel or similar.
Dwight
From: erik--- via cctalk
Sent: Sunday, September 24, 2023 1:35 PM
To: cctalk@classiccmp.org
Cc: e...@baigar.de
Subject: [cctalk] Re: Tadpole/RD
There is little surviving software for the 4004. There are a few places with
snippets of code to do things like add or subtract several digits but my
searches of the internet have shown little actual code. The NBS has some code
to track satellites and correct for time delays from their clocks (
The Intlec 4 was no more or less a computer than the Altiar or IMSAI was. It
didn't typically have as much RAM but one could write and run code on it.
As for the F14 processor. For the purpose used, it was likely a DSP. More
intended to do matrix multiplication using adds and shifts. This would b
/play.google.com/store/apps/details?id=com.aol.mobile.aolapp>
On Wed, Nov 22, 2023 at 8:34 PM, dwight via cctalk
wrote:
The Intlec 4 was no more or less a computer than the Altiar or IMSAI was. It
didn't typically have as much RAM but one could write and run code on it.
As for the F14 pr
I'm in San Jose, Calif. I have a cheap clock that I picked up at a garage sale.
It being a cheap clock, uses a ferite rod, so is quite directional. Also, I
need to place it in a window as well. It seems to pick up the signal at least
once a day, most likely after dark.
Mine blinks the antenna si
From: ben via cctalk
Sent: Monday, April 22, 2024 12:43 PM
To: cctalk@classiccmp.org
Subject: [cctalk] Re: Z80 vs other microprocessors of the time.
On 2024-04-22 1:02 p.m., Chuck Guzis via cctalk wrote:
> I'd like to see a Z80 implemented with UV-201 vacuum
I'm not claiming it was the first personal computer but is was my first
personal computer. It was within a year or two of just about any other first
personal computer.
It was a Poly88 with ROM based tiny basic. I had a keyboard, I think I got from
Mike Quin's as well as a Singer typing terminal
No one is mentioning multiple processors on a single die and cache that is
bigger than most systems of that times complete RAM.
Clock speed was dealt with clever register reassignment, pipelining and
prediction.
Dwight
Sounds like a MDS 800. Separate drive box and machine.
If it is, it is a Multibus system. It likely has a 8080 processor but could
have been upgraded to a 8085. It might have a 8086 but it would likely still
have the 8080 as the boot processor.
Unless it was upgraded to something else, it would h
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