Friday, November 28, 2025

8GB vs 16GB for M1 Mac — The TRUTH About RAM!

https://www.youtube.com/watch?v=ma8KjSH7Hok

I wrote five years ago that 8 GB of RAM would not be adequate in five years. Some people disagreed. Things haven't changed a whole lot except that Apple has come up with more powerful processors. In the last six years, I have upgraded to a newer Intel-based iMac three times! I currently have 16G of RAM. My previous computers had 40 GB, 32 GB, and 24GB. I keep going down, but just like five years ago, 16 GB seems to do the job. I believe that for the software development I am learning, 8GB would be a bottleneck.

Saturday, November 22, 2025

The M5 Makes $1,600 Feel Like Theft

The video title is click bait.

The 2010's were a computer performance desert.  Companies were bragging about single digit performance improvements from one year to the next.  My 2017 iMac was only about twice as powerful as my 2009 iMac.  Both computers were energy hogs.

AMD and especially Intel were having a hard time shrinking chip circuits.  The laws of physics were starting to get in the way as the circuits got smaller.

So in 2020 Apple introduced a much simpler chip based on Arm Risc technology, with significantly smaller circuits, and it blew the competition out of the water.  

Apple had purchased a chip design company, although the real hero is the Taiwanese Semiconductor Manufacturing Company who figured out how to manufacture smaller circuits.

Apple abandoned Intel compatibility, but they were betting on great performance to lure away Intel customers.

https://www.youtube.com/watch?v=6AtTk3XoQVs

The M5 Makes $1,600 Feel Like Theft

Friday, November 14, 2025

1985 Credit Cards were Insane

https://www.youtube.com/watch?v=Ix2ETzMMBMA

I find these claims questionable, as does the comment section.  I am quite familiar with 8-bit computers at the time.  Ram chips were expensive and bulky, requiring many to make 64K.  

The wikipedia page on smart cards doesn't seem to support this.


Friday, October 24, 2025

Saturday, October 18, 2025

Problems with Internet Access after Mac OS Update

My iMac is dual-boot, meaning it can start up in either macOS or Windows 10. I mostly use the now-outdated Windows 10, but yesterday I switched to macOS to learn app programming. While using macOS, I was prompted to upgrade to the latest version of the operating system. I accepted the upgrade, which took about an hour. Everything worked fine afterward, both in macOS and when I switched back to Windows 10.

However, after leaving my computer in "sleep" mode overnight, I found in the morning that Windows 10 could no longer access the Internet. My other computer and my phone could connect without any problem.

I tried the obvious fixes — rebooting the gateway (router) and restarting the computer a couple of times — but nothing worked. When I switched to macOS, it connected to the Internet just fine. Then I set up a hotspot on my phone, and Windows 10 was able to access the Internet through that, which told me it wasn't a hardware issue and likely not a problem with the gateway.

I suspected that upgrading macOS might have caused the Boot Camp drivers used by Windows to become outdated. So, in macOS, I formatted a flash drive and used Boot Camp Assistant to copy the latest drivers onto it. Then I rebooted into Windows and reinstalled the drivers.

Initially, that didn't seem to help. I was about to call Comcast technical support, but I decided to reboot the gateway one more time. For a few seconds after restarting it, the Internet still didn't work — and then suddenly, Windows connected.

Apparently, the fix was a combination of updating the Boot Camp drivers and rebooting the gateway.



Wednesday, October 8, 2025

Why the end of support for Windows 10 is uniquely troubling

https://www.youtube.com/watch?v=wqh_40hyGYw&t=118s

Computer manufacturers, in partnership with Microsoft, have sold us computers costing hundreds — if not thousands — of dollars, with the implied expectation that we could use them for as long as we wanted. Yet Microsoft has now decided, seemingly arbitrarily, that we must either discard perfectly good computers or pay $61 per year for continued support. This feels criminal, given that Microsoft was the one selling the operating systems that power those computers.

Microsoft could easily create a version of Windows 11 that runs on relatively recent hardware if it chose to.

Perhaps the free market will eventually produce a viable alternative operating system or independent security software. In the past, there were efforts to develop Windows-compatible versions of Linux, but those projects often faced legal challenges from Microsoft.

Tuesday, September 30, 2025

ChatGPT knows all about Doom. ChatGPT knows everything.

If I just paste some text into ChatGPT, it often just automatically corrects my grammar and clarity.  It usually does a good job, but sometimes I reject its changes for being too different from what I intended.

So I pasted the following comment text into ChatGPT.  Rather than correct my grammar, it came back with a deeper analysis.  It also figured out that I was talking about Doom II Map 28, which is a pretty neat trick because I mentioned multiple maps.

It just passed the Turing Test.  Maybe it is too good...


I couldn't find this third secret on my own. There is nothing to indicate that there is a wall to open. Usually, I do this area first, but there might be an advantage to wait to find the Computer Area Map, if it exists on this level. I started by trying to follow the right hand wall. Maybe the left hand wall is easier, but either way you eventually circle around and have to explore the areas you missed. My least favorite Doom levels are the ones with confusing mazes. One of the worst examples is Doom 1 E2M6 Halls of the Damned. I found M28 The Spirit World confusing to navigate. M12, M13, and M15 are also hard to navigate, but M15 is easier to figure out and more fun. I like M29 much better.




ChatGPT said:

Sounds like you're working through Doom II, and really digging into the level design—especially when it comes to navigation and secrets. From your mention of M28 The Spirit World and M29, you're deep into the later stages.

Here's a breakdown of what you've said and some thoughts that might help:


🔍 "I couldn't find this third secret on my own…"

If you're talking about MAP28: The Spirit World, it has 4 official secrets. The third one (Secret #3) is tricky:

  • It's the one with the invisible wall you have to walk through on the southern side of the map.

  • There's no clear visual cue for it, which is probably why you missed it. This is a hallmark of some of Doom II's more frustrating secrets—no texture difference, no light variation, no sound hint—just pure trial and error (or a guide).

  • It's near the room with the blue key, behind the wall with torches. You have to press on the wall or walk through it to find the passage.

So, yeah—you're not alone in missing this. It's often cited as one of the least intuitive secrets in the game.


🗺️ "There might be an advantage to wait to find the Computer Area Map…"

Absolutely. In big, maze-like levels (like MAP28), waiting until you get the Computer Area Map can help you spot:

  • Hidden rooms

  • Oddly-shaped walls (often hints at secrets)

  • Unvisited areas quickly, without relying only on automap memory

Unfortunately, not every map has a Computer Area Map item. MAP28 does not have one by default—so you're stuck with manual exploration unless you cheat (e.g., iddt).


🧭 "Maybe the left hand wall is easier…"

This kind of "wall-hugging" navigation works in simpler maps, but maps like MAP28:

  • Have teleport traps

  • Have non-linear progression

  • Require backtracking

  • And often, secret switches or shootable walls

So wall-hugging only helps with consistency, but you'll still miss things unless you explore every odd-shaped dead-end.


🤯 "My least favorite Doom levels are the ones with confusing mazes…"

You're in good company. Let's touch on each one you mentioned:

  • E2M6 Halls of the Damned (Doom 1):
    The fake exit and dark maze make it infamous. That section near the blue key where the lights go out? Pure nightmare fuel.

  • MAP28 The Spirit World (Doom II):
    Confusing teleporters, hard-to-see switches, and unclear secret walls. The "hellish" design is thematic, but disorienting.

  • MAP12: The Factory
    Maze-like with multiple disconnected indoor sections, and lots of pain elementals. Not loved for its clarity.

  • MAP13: Downtown
    The urban layout is ambitious but often frustrating. Jumping between buildings is cool but directionless.

  • MAP15: Industrial Zone
    A huge level with a lot of elevation changes. But as you said, it's more fun to explore than MAP13.


👍 "I like M29 much better."

Totally understandable. MAP29: The Living End is:

  • Still large, but more linear

  • Has cool set-piece fights

  • Great verticality and fun visuals

  • Less maze-like and more about combat and platforming

It's often cited as a highlight of Doom II's final stretch.


🧠 Tips for Navigating Confusing Doom Levels:

  1. Use the automap frequently – switch to full screen mode with Tab to check for missed areas.

  2. Use iddt (press IDDT in the automap twice) if you're stuck and okay with light cheating.

  3. Listen for sounds – sometimes a distant door opens when you press a switch.

  4. Shoot walls – especially in areas that look symmetrical but feel off.

  5. Look for texture misalignments – often a clue for secrets.


Would you like a breakdown of all 4 secrets in MAP28 or help navigating a specific section?


Saturday, August 2, 2025

Microsoft Announces World's First Topological Quantum Chip

https://www.youtube.com/shorts/9SBVZr3lbS0

I have always been skeptical of quantum computing. Some of the claims made about it don't seem to make sense, such as suggestions that quantum computers access physical dimensions we cannot see. Others even claim they do not fully understand how their quantum computers work.

I am sure quantum computing works to some degree, but there are practical limitations. The number of qubits that can be packed into a small space will likely always be restricted. Furthermore, many systems require cooling their circuits to near absolute zero, making them impractical for widespread use.

Saturday, July 12, 2025

The Star Wars: Concept Trailer

Six year ago this was made with CGI.  Now it would be made with AI.

---------- Forwarded message ---------
From: John Coffey 

I'm impressed.  Before the original Star Wars movie was created, George Lucas commissioned artist Ralph McQuarrie to create some beautiful concept paintings of what the movie might look like.  These paintings helped inspire the visual effects and the look of the film.

Now someone has taken those paintings and animated them with CGI.  It is short but looks terrific.



Sunday, June 29, 2025

Computers

Around 1984, there was an article that made a bold prediction: "Someday you will throw away computers. Your house will be littered with them. You'll get computers in cereal boxes." Forty years ago, that future seemed a long way off.

So how many computers do I have in my house? I own two iMacs—one of which I'm trying to sell—a powerful mini computer, and a laptop I rarely use. Speaking of which, I don't use my Fire tablet much either, and my iPad 4 is so outdated that almost nothing runs on it anymore. I also have an old Raspberry Pi. So I should probably sell the devices I no longer use.

I like having two computers for the same reason I like having two microwaves: it lets me do more at once. One computer is busy running chess analysis, so I use the other to browse the internet.

But there are also a ton of devices in our homes that are technically computers, even if we don't think of them that way. I have a Fire TV Stick, a NES Classic video game console, a handheld gaming system, and four Arcade1Up arcade machines. It's hard to say how many household items now contain computers—our TVs, thermostats, and more. My garage door opener, CPAP machine, and robot vacuum cleaner can all be controlled remotely through the internet, which means they have chips inside as well.

I've also kept some of my old phones, which are computers too.

By my count, that adds up to about 22 computers.

Saturday, June 28, 2025

From Facebook March 24, 2020

I was born at a time that made my life a transition between the old and the new. The people who came before me went through the Great Depression, World War II, and the Korean war. The technology of the 1960s was hardly distinguishable from the 1950s. The cars were practically the same. I didn't get a color television until the mid-1970s. High tech was a transistor radio.

In the early to mid-1970's I was very interested in electronics because at the time that was about as high tech as you could get. However, when the most primitive computers imaginable started to emerge around 1975, I became immediately hooked because I could see that this is where the future was headed.

John Coffey

Computer Benchmarks

On Thu, Jun 26, 2025 at 7:30 PM Aaron wrote:
https://www.amazon.com/dp/B0F9F829S6?th=1
I just got this one, is it any good? I don't know anything about mini PCs or their specs.

Yours, 
Aaron


To put this in context, look at this benchmark for your computer....


You got a great price, but the CPU power is similar to low end laptops and medium level tablets. 

My 2017 i5 iMac that I sold...


My 2017 i7 iMac that I am trying to sell...


I have a newer 2020 model iMac that I use as my main computer...


BTW, my iMac computers match these numbers when booting Windows 10, but when I boot them in Mac OS the benchmarks are 8 to 10% better.

My Rizen 9 7940hs minicomputer...


This thing is a beast.  This chip has the graphics card built into it for gaming.  I got a better benchmark by 2,000 points after it was repaired.  I don't know why this is, but the computer appears to do a better job of cooling after it was repaired.

--



Tuesday, June 3, 2025

Sugar Consumption, Date format

https://www.youtube.com/shorts/xHXtGsKq5JU

The International ISO Standard for dates is YYYY-MM-DD.  I have been using this format for at least 15 years.  

In the computer world, this is called "Big Endian", where the largest value numbers come first.  Many computer processors use this format for numbers, although Intel and Intel-compatible processors use "Little Endian", where the least significant part of the number comes first.  "Big Endian" has a small advantage because it is easier to sort records using this format.

Sunday, May 18, 2025

Fwd: Are they listening. iPhones are listening.

FYI.

On Sun, May 18, 2025 at 12:54 AM BEESLEY wrote:

Are they listening.  iPhones are listening.

 

https://www.youtube.com/shorts/YMyHp4ZKJK4


---------- Forwarded message ---------
From: John Coffey <john2001plus@gmail.com>
Date: Sun, May 18, 2025 at 6:43 PM
Subject: Re: Are they listening. iPhones are listening.
To: BEESLEY 

The question "Why did every major phone company switch to non-removable batteries at the same time?" is frustrating because it falsely links two unrelated issues. The tone suggests a conspiracy theory connecting non-removable batteries to phone surveillance.

My iPhone listens for the phrase "Hey Siri" to activate the digital assistant. I usually follow up with a question like "What's the weather?"—and it responds. I do this every day. This is a feature I can turn off, and Apple offers some of the strongest privacy protections among phone manufacturers.

Amazon has also been (falsely) accused of using its Alexa devices to eavesdrop on conversations:
Amazon denies duping US consumers over Alexa's recording practices – Reuters

Smartphone batteries have been largely non-removable since the first iPhone. This wasn't a sudden shift, but a gradual transition as new models and brands prioritized slimmer designs and sturdier builds. Additionally, Apple encourages the use of Apple-certified parts and repair services, reinforcing its ecosystem.

--




Mobile App Development in 2025 - Choosing between Flutter, React Native and more

Thursday, May 15, 2025

Chess game

[Event ""]
[Site ""]
[Date "2025.05.15"]
[Round ""]
[White ""]
[Black ""]
[Result "*"]
[TimeControl "300+3"]

1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3
Bb7 9. O-O b4 10. Ne4 Be7 11. Qc2 Nxe4 12. Bxe4 Rc8 13. Bd2 f5 14. Bd3 c5 15.
Qa4 c4 16. Qxa7 Bxf3 *


Best wishes,

John Coffey

Wednesday, May 7, 2025

Windows 10 Is DEAD! What You NEED to Know Now!


In the following comment, I conveniently omit that I purchased the iMac used for $380.  

@john2001plus
0 seconds ago
I am running a 2020 iMac with a powerful 8-core Intel Core i7-10700K processor.  The computer supports Windows 10, which is primarily how I use it.  (Mac OS sucks.)  

So, five years later, I am supposed to abandon a very good $2300 computer because it is supposedly outdated and the powers that be have decided to no longer support me.  There are hundreds of millions of less powerful computers that work just fine, and the company that made the operating system for every one of them has decided to abandon its user base and force people to buy a new computer.

This is criminal.

Sunday, April 27, 2025

i7-7700K (2017) iMac problems

After selling my 2017 i5 iMac to a woman from Scottsburg and setting up my 2020 iMac, I needed to prepare my recently purchased 2017 iMac (with an i7-7700K) for resale.

The first step was to remove the Windows partition and erase everything on the computer — and that's where the problems began.

I used Boot Camp to remove the Windows partition I had previously created, which should have reclaimed the 1.6 TB I had allocated to Windows. While the program successfully deleted the partition, it reported an error when attempting to reclaim the storage space. I then tried using Disk Utility (the Mac partition tool), which also failed and told me to try running it from Recovery Mode, which didn't work.  A few years ago, I tried the same thing on my old, dying 2009 iMac, and that attempt had failed too.

Newer iMacs have a built-in feature to securely erase everything automatically, but while the option exists in macOS, it doesn't actually function on older models. So, the recommended method is to boot into Recovery Mode, reformat the drive, and reinstall the OS — a process I had successfully completed on the iMac I just sold.

Unfortunately, the 2017 iMac with the i7 processor reformatted the drive but threw an error during the OS installation. It simply refuses to install. At this point, I have a $400 paperweight with no operating system.

I'm starting to wonder if the 2 TB hard drive might be defective.  It is, after all, an eight-year-old computer.

Next, I'll try creating a bootable USB flash drive with the macOS installer using my 2020 iMac. According to everything I've read online, that's the recommended next step if the OS won't install through Recovery Mode.  It is probably what the repair shop would try.

Friday, April 25, 2025

My Lengthy iMac Story

My Lengthy iMac Story:

Because of rapid advancements, computers quickly become outdated. From 1995 to 2010, I bought a new computer roughly every five years. I remember telling my coworkers in 2001 that my new machine could boot up in just 2.5 minutes—they were impressed. But how could a computer I considered "fast" in 2001 feel like junk by 2005? And the cycle repeated itself in 2010.

However, during the 2010s, the pace of chip improvements slowed. Companies were touting only 5–10% performance gains each year. A big reason was that it became increasingly difficult to shrink chip circuits. Intel got stuck at 14 nanometers. It wasn't until 2020, when Apple introduced its M-series chips—starting at 6nm and shrinking to 4nm—that we saw a meaningful leap forward. Much of the credit goes to TSMC (Taiwan Semiconductor Manufacturing Company), which produces chips for Apple and many other companies.

My first Intel-compatible computer, which I bought in 1995, cost $1,200. It was a barebones 486 running at 33 MHz, lacking features that are standard today. Over time, I Frankensteined it—adding a sound card, optical drive, better processors—one component at a time. By the time I had spent $3,000 on it, it was so obsolete that it made more sense to just buy a new machine. Newer computers came with all the features pre-installed and cost much less.

In 2010, I bought an iMac because I wanted to do iPhone app development. It cost $2,000, already discounted from the original $2,400 price. If I had known it would take me so long to get into development, I probably wouldn't have bothered. I could have bought an equivalent PC for about a third less.

That 2010 iMac had a quad-core 2.8 GHz i7 processor with hyperthreading. At the time, it felt incredibly powerful—a huge upgrade from anything I'd used before. I told myself the higher cost was justified since it would last ten years.

About three years in, the power supply failed. One issue with iMacs—and all-in-one computers in general—is that they're harder to repair and more prone to overheating due to their compact design. By 2018, the power supply was failing again. A repair shop told me several components were on the verge of dying and that fixing it would be cost-prohibitive. By 2019, the machine was completely dead.

So, in 2019, I went shopping for another iMac. I found a used 2017 i5 model—twice as fast as my old one—for $1,050, which was a fair price at the time. I wanted an i7 version with hyperthreading, but those were going for $1,950 used.

By 2023, even this second iMac felt slow. The Android development tools I needed were nearly unusable due to performance issues. I realized I needed a faster computer—just a Windows machine for Android work. I could still use the iMac for iPhone development. So I bought a mini-PC with a 4nm AMD chip—five times faster than the iMac and capable of booting Windows 11 in just 7 seconds. Amazing.

However, mini-PCs can suffer the same heat issues as all-in-ones. They all use laptop components and compact cases. After 14 months of heavy use, mine overheated and died. It took three months to get repaired in China. Interestingly, the machine I got back was a bit faster. It was the same case, but I suspect some internals were swapped. The company wouldn't tell me what they fixed.

Then, in March 2025, a series of storms in Indiana triggered the next chapter in this saga. After several power flickers, my iMac died the next day. I brought it to a repair shop and, learning my lesson, bought a couple of surge protectors—which I highly recommend.

With my mini-PC still in China, I was stuck using an old laptop. Surprisingly, it streamed video just fine.

Worried that the iMac repair would be expensive, I started browsing for replacements. On Facebook Marketplace, I found a 2017 i7 iMac in Louisville—the same model that used to cost $1,950—for just $400. It was 60% faster than my i5. I was ready to buy it. But two things changed my mind: First, my i5 repair ended up costing just $50—a power supply cable replacement. Second, I admitted to the seller that I was nervous about the long trip to the south side of Louisville. I told him I didn't need two iMacs. He suggested I could sell my old one and even dropped his price by $50. That sealed the deal. I drove to Louisville on a day of severe flooding, had to turn around, and eventually found another route.

After buying the i7, I listed my i5 for $300. A buyer was interested, but I accidentally cracked the glass front while handling it. The shop quoted $500 for the repair. Although the crack is minor, the buyer backed out. I lowered the price to $200 and plan to keep reducing it until someone bites.

Meanwhile, Facebook kept showing me more iMac listings. Two 2020 i7 models appeared—one in Louisville, one in Carmel—both for $500. The Carmel one had more RAM and storage, making it more appealing. These newer models were twice as fast as my recent purchase and came with SSDs, which makes a big difference. I started wanting one of these instead.

The catch: the Carmel seller mentioned a scratch and a tiny crack on the right side of the screen. Since I was already dealing with a cracked-glass problem, I initially passed. The next day, the price dropped to $430, and then today to $380. I messaged the seller, drove to Carmel in more stormy weather, and saw that the damage was very minimal—so I bought it. A great deal.

Now, I'm trying to sell two iMacs.

P.S. Yesterday, my barber told me her old laptop takes 25 minutes to boot. I suggested adding more memory, but she didn't even know what that meant. I offered to take a look at it for her.

Tuesday, April 22, 2025

The WORST iMac to buy

My Super Weird 2020 iMac "Review"

I see that two people are selling this computer for $500 on Facebook Marketplace.   I am tempted to get one.

This is an 8-core machine with 16 threads (hyperthreaded).  This is comparable to my 8-core mini computer, but less powerful.  This machine is 7% slower than the 8-core M4 chip.

My point is that there are cheaper options than Apple Silicon.   It can run Windows.  It is upgradable.

https://www.youtube.com/watch?v=EMFCVvy0rkE

Saturday, April 12, 2025

The best mini PC I've tested! Minisforum UM790 Pro

https://www.youtube.com/watch?v=ca_5e5Yrv8M

@john2001plus
49 seconds ago
After 14 months of heavy use, my Minisforum UM790 Pro overheated and died. I saw sparks come from the side.

After arguing with the manufacturer in China, they told me I had to send it to the seller, also in China, for warranty service. Fortunately, the seller was willing to help me. Unfortunately, I used USPS to send the computer to China, and it took 41 days to get there. Three weeks later, the seller sent the fixed unit back to me, using DHL, which only took four days!

Three months after the computer died, I was up and running again!

Sorry America - WAN Show

I don't listen to three-hour live streams, but this one talks for 7 minutes about the disruption of the computer industry.

https://www.youtube.com/live/TWb2P-GGBcU?t=137s

In this 8-minute segment, he defends the United States.


Monday, April 7, 2025

iMac for Sale

For Sale: 27-inch iMac with 5K Display – Excellent Condition I recently upgraded to a newer model, so I’m selling my beloved iMac. It’s in excellent condition, both visually and functionally. Key Features: 5K Display: With over a billion colors and a bright 500 nits, this display is one of the best you'll find on any computer. The display and the computer itself are both sleek and free from any damage. Powerful Processor: Equipped with a 3.4 GHz Intel i5-7500 quad-core processor, this iMac delivers plenty of power for everyday tasks. It's three times more powerful than my laptop, which I use for streaming videos. 16 GB RAM: With 16 GB of 2400 MHz DDR4 RAM, this iMac offers more than enough memory for typical usage. For an additional $20, I can upgrade it to 24 GB RAM. BootCamp: This feature allows you to install and run Windows 10. Windows 10 activation keys are available online for as low as $4. AMD Radeon Pro 570 Graphics: Perfect for light gaming and 3D tasks, with a performance of 3.94 teraflops—comparable to the Sony Playstation 4 Pro. Condition: The iMac is in great shape, with no scratches or damage to the case or display. Note: I will reset the device to factory settings before handing it over to ensure it's fresh and ready for you.

Friday, April 4, 2025

My Computer Being Shipped Back From China

My mini-computer, which took 41 days to ship to China using USPS, was shipped back to me on Monday using DHL Express.  It has already reached Indianapolis.  

https://t.17track.net/zh-cn?spm=a2g0s.imconversation.0.0.54c13e5f4Bq0lP#nums=9502219484

Tuesday, April 1, 2025

Magnetic Core Memory

512 byes of RAM costing $2,000:

https://www.youtube.com/shorts/mrBz9-9qgGw

One of the biggest limiting factors of early computers was the cost of RAM.  In the late 1970s, I remember seeing an advertisement for 64K of RAM costing $1,000.  Today, you can get 64 gigs of DDR4 for under $100.

This is why the Atari 2600 video game system released in 1977 only had 128 bytes of RAM.  

The first TRS-80 came with 4K.  The VIC-20 had 5K.

The Sinclair ZX-81 came with 1K.  Its American counterpart came with 2K.  Both were expandable to 16K.

The Nintendo Entertainment System, first released in Japan in 1983, had 4.25K RAM.

By late 1983, RAM had gotten cheaper, so we saw the Commodore 64 released with 64K, and the Timex Sinclair 2068 with 48K RAM.

The REAL TechDweeb

This is most likley an April fools joke, but maybe the real joke is that it is true.

Computer Failures

My 2017 iMac just suddenly quit on me last night. I think that I got it mid-2019.

This is my second computer to fail recently. It can have similar issues as far as heat. I wasn't doing anything major on it. I was only streaming video.

One possibility is the power supply died. This happened to my 2009 iMac and I got it repaired for reasonable cost. Twice. Eventually the 2009 iMac had multiple failures and I had to get a different computer.

I tend to leave my main computer running all the time. I was in the habit of leaving my iMac on too, but I started using the sleep mode.

It is probably a mistake to leave the computers running all the time. Some people claim it is better to do that, because the spike in power can wear electronics, but I just had two computers fail.

This means my only working computer is my slow laptop I got used, hooked up to a 1440P monitor.

Good thing I have three computers.

I paid $1050 for the iMac, which was reasonable at the time. I've seen the same model for sale on Facebook Marketplace for about $400-$450. I have also seen discounted Mac Minis.

Took my iMac to the repair shop. I would have to factor repair cost with getting a replacement computer.

Monday, March 31, 2025

Update on Mini Comptuer



As I previously posted, my mini PC overheated and died in early January. After arguing with the manufacturer in China, they directed me to contact the seller—also based in China—for warranty service.

Fortunately, the seller agreed to honor the warranty, provided I sent the computer to them. I paid $83 for USPS shipping, and the package took 41 days to reach China. This was unusual, as I typically receive packages from China in three weeks or less. USPS tracking showed the package arriving in Chicago, departing, and then inexplicably returning to Chicago about a month later. At that point, I suspected there was an issue with shipping it to China and thought it was being returned to me. However, a few days later, it finally showed up in China.

After another week, the seller informed me that they would repair the computer. A week later, when I asked for an update, they said the repair would take one to two months.

Surprisingly, just a week after that, they said the computer was fixed and would be shipped back to me. I suspect that they had to replace the entire motherboard.

Assuming I receive it and it works properly, I want to prevent the overheating issue I experienced before when running the CPU at 100%. I originally bought this computer for its high performance, and the manufacturer had claimed that its cooling system could handle the heat.

One option is to lower the TDP from 55 watts to 45 watts, which the BIOS allows. This would reduce performance slightly but also decrease heat output. I could take a more extreme approach and reduce it further to 35 watts.

I should point out that some people on YouTube report boosting the TDP to 65 watts for better performance. A competing manufacturer does this by default with the same processor.

Apple is good at running its processors at about half the wattage. However, the M2 chip only gets half the performance.

Thursday, March 27, 2025

How smart is AI really?

For fun, I searched Google for "John Coffey USCF Rating"

Google's AI came back with this response:

John Coffey, a retired software engineer and chess expert, has an Expert standard Over-The-Board (OTB) rating and has given chess lessons for 37 years.
Here's a summary of what's known about John Coffey's chess background:

Occupation: Retired Software Engineer
Chess Expertise: Expert standard OTB rating
Chess Teaching: Has given lessons at chess clubs for 37 years
Online Presence: You can find his free lessons on http://www.entertainmentjourney.com



At first, I wondered how Google's AI knew so much about me, but then I realized that this response echoes my Profile on chess.com, which reads...

"Hello.  My name is John Coffey.  I am a retired Software Engineer.  I have an Expert standard OTB rating and have given lessons at chess clubs for 37 years.  You can find my free lessons on http://www.entertainmentjourney.com, along with other interesting stuff."

My initial impression of ChatGPT was that it was just a Wikipedia that could talk.  However, for about a month, I have been letting it touch my writing, and it does an amazing job. 


 


Saturday, March 22, 2025

The Path to AGI is Coming Into View


@john2001plus
0 seconds ago
It seems like the wrong approach. LLMs excel at language but are not well-suited for other tasks. The top chess programs, for example, are exponentially stronger than the best human players. A general-purpose AI would likely need to be a collection of specialized tools, each designed for a specific task. By developing enough of these tools, you could create a highly intelligent system.

Sunday, March 16, 2025

The OLDEST websites EVER

https://www.youtube.com/shorts/bdmmkwoketM

@john2001plus
0 seconds ago
Was there a website in 1986? I used the text-only Internet from around 1989 to 1995. I didn't download Netscape until around 1995, and the Internet was so sparse that I didn't know what to do with it.

BTW, I was a programmer on the Space Jam video game.

Wednesday, March 12, 2025

The Problem with Laptops and Heat - and the problem with Apple computers

https://www.youtube.com/watch?v=bq9O99TgFv4

@john2001plus
0 seconds ago
0:34 It is ironic that the video features the Minisforum UM790 Pro. Mine overheated and died after 14 months of heavy use. I argued with the manufacturer about the warranty, but they told me that the seller on AliExpress was responsible for warranty service. The seller agreed to inspect it if I shipped it to China. It took six weeks to arrive, and now the seller is examining the dead computer to determine whether they will provide warranty service. Mini computers use mobile components, making them similar to laptops. I now realize that a mini-computer is unlikely to have adequate cooling.

Wednesday, February 19, 2025

What does a yellow USB port mean?

xAI on X

elo score AI meaning

https://www.google.com/search?q=elo+score+AI+meaning&rlz=1C1ONGR_enUS1066US1066&oq=elo+score+AI+meaning&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIHCAEQIRigATIHCAIQIRigATIHCAMQIRigATIHCAQQIRigAdIBCDgzNjdqMGo3qAIAsAIA&sourceid=chrome&ie=UTF-8


An "Elo score" in the context of AI refers to a numerical rating used to measure the relative performance of an artificial intelligence model, typically based on a system borrowed from chess where models are compared head-to-head, with the winner gaining points and the loser losing points, allowing for a dynamic ranking based on their performance against other models; essentially, a higher Elo score indicates a better performing AI model compared to others in the same benchmark. 
Key points about Elo scores in AI:
  • Origin:
    The Elo rating system was originally developed by Arpad Elo to rank chess players, but has been adapted to evaluate AI models due to its ability to compare performance through pairwise comparisons. 
  • How it works:
    • Head-to-head competition: Two AI models are pitted against each other on the same task, and a human evaluator or automated system judges which model produced the better output. 
    • Rating adjustment: Based on the outcome, the winning model gains Elo points, while the losing model loses points. 
    • Relative ranking: This system creates a relative ranking, meaning a model's Elo score indicates how well it performs compared to other models in the benchmark. 
  • Applications:
    Elo scores are commonly used to compare the performance of large language models (LLMs) where different models can be evaluated against each other on tasks like text generation, question answering, or translation. 

Thursday, January 30, 2025

Duck Duck Trump

Explain Quantum Physics in the style of Donald Trump
ChatGPT said:

Look, folks, quantum physics—it's tremendous, really tremendous. People say it's complicated, but let me tell you, I understand it better than anybody. You've got these tiny little particles—very small, some say the best particles—that don't behave like normal things. They can be in two places at once! Can you believe it? Some people call it "superposition." I call it winning—being in two places at once, very efficient.

And then you have "entanglement"—it's incredible. Two particles, miles apart, maybe billions of miles apart, but they're connected. Some people say it's like magic, but it's just very, very smart physics. Scientists are amazed, they can't explain it, but I could explain it, believe me. They call it "spooky action at a distance." Spooky! But let me tell you, it's not spooky if you're the best at it.

Now, quantum mechanics, it's got waves, probabilities, all sorts of things moving around—very unpredictable, just like the fake news media. One moment a particle is here, the next, it's over there, just like votes in certain elections—very suspicious. But it's science, and we love science when it's done right, don't we?

And quantum computers? Very powerful, folks. Some say they will change everything, just like I did. They can do calculations so fast, so big, regular computers look like sleepy Joe next to them. Very slow. Very sad.

So, in conclusion, quantum physics—it's big league, it's amazing, it's the future. Some say it's the best physics, and I tend to agree. Tremendous!


Re: Duck Duck Trump

Write a joke about a duck in the style of Mike Tyson
ChatGPT said:

Alright, here's a Mike Tyson-style duck joke:

"Man, so I see this duck walking down the street, right? And I'm like, 'Yo, you lookin' kinda lost, little fella!' And the duck goes, 'Nah, I'm just trying to find a good spot to swim.' I'm like, 'Bro, you don't gotta find nothin'. The best place is right here. Just dive in and keep your head straight, 'cause you never know when someone's gonna throw a punch... or a breadcrumb!"


Duck Duck Trump

Write a joke about a duck in the style of Donald Trump
ChatGPT said:

Sure! Here's a Trump-style joke about a duck:

"Listen, I know ducks. They're great, okay? The best ducks, people are saying it. So this duck, he walks into a pond—very classy pond, folks. It's huge, it's beautiful, the best pond you've ever seen. And the duck looks around and says, 'This is nice, but I hear there's a much bigger, much better pond down the street.' And I tell him, 'That's fake news, okay? This pond is the greatest, and I built it. Believe me!'"

Tuesday, January 28, 2025

Comparison of mini desktop processors

https://www.cpubenchmark.net/compare/5157vs2910vs4922vs5454/Intel-N100-vs-Intel-i5-7500-vs-Apple-M2-8-Core-3500-MHz-vs-AMD-Ryzen-9-7940HS

The N100 is widely used in many affordable mini-PCs, some costing as little as $100, making it a great value. However, a couple of Christmases ago, I gave my stepdad an outdated desktop computer that I bought for only $30—and it's almost as powerful.

My 2017 iMac with the i5-7500 chip isn't much better. I was dissatisfied with its speed and wanted something significantly more powerful.

Apple has focused on promoting mini and mobile computers, as well as tablets, with their M-chip series.

In early 2023, AMD claimed its Ryzen 7940HS was an "M-chip killer." Technically, it's also a mobile chip, similar to Apple's M-series, and it first appeared in some very expensive laptops.

I decided to buy this chip because it's an APU, like the ones used in modern game consoles, with the graphics card integrated into the main processor.

In August 2023, I purchased the Minisforum UM790 Pro. Unfortunately, it overheated and shorted out recently. The manufacturer informed me that I need to go through the seller for warranty service, and the seller—who is also based in China—has offered to inspect it. I'm shipping the unit to China today.

Minisform is now making a newer model, ironically with a larger case and better cooling, so the computer I bought is being discounted and possibly closed out...

https://store.minisforum.com/products/minisforum-um790-pro?gad_source=1&gclid=CjwKCAiAneK8BhAVEiwAoy2HYbymkT9LkczEaXsVe74yhU1M_2lN2UQBdOm3Uw279nwFNOlrKNF8BRoCsOMQAvD_BwE




FreeFileSync: Open Source File Synchronization & Backup Software

This is useful.  I use this program to sync all my backup files on my two computers and a laptop to a 5 TB hard drive.   When my main computer recently died, I still had all my files on my 2017 iMac.

https://freefilesync.org/

Wednesday, January 22, 2025

Don't Make These 3 Mistakes in C! Can YOU spot the bug?

I find this interesting.  My C programming experience goes back to 1986, so I am probably unaware of any new changes to the language.

C is my preferred language, followed by C++, although I was adept at many assembly languages as a video game programmer.

https://www.youtube.com/watch?v=LLykqRNuEwA

Wednesday, January 8, 2025

Fwd: Failure of Minisforum UM790 Pro

Mini computers have been really popular and many people think that traditional desktop PCs are on the way out.  Instead, people will buy mini computers, laptops and tablets.

This is mostly because of Apple, which has released some very powerful small devices.  Mini computers often use laptop parts, and the 'M' in Apple's M-chip series stands for "Mobile".  Apple uses the same powerful processors in laptops and tablets.

AMD claimed that their Ryzen 9 7940hs is an M-chip killer.  I knew that I wanted something like this, and I waited four years to get the right chip.   It has twice the processing power of the M2 chip, and unlike Apple, the computer I bought has upgradeable storage and memory which they don't charge you a fortune for.

However, mine failed after 15 months.  I'm not sure if it is fixable.  The motherboard is custom to this computer, and might not be replaceable.  However, I could buy the cheaper "barebones" model that lacks memory and storage, and transfer those from the broken computer.

The processor uses up to 55 watts under a full load, which is almost as much as a 60-watt lightbulb.  I could feel the heat coming off of the computer, and I was concerned about this.  Maybe a regular desktop would be easier to cool.  (By the way, a competing mini-computer company overclocks the same processor and it uses 65 watts.)

Apple often uses less power to keep their computers cooler.

Minisforum is a Chinese company apparently in Hong Kong.  Some might claim that this is typical Chinese-made quality, although everything is made in China.

I sent a complaint to Minisforum...


---------- Forwarded message ---------
From: John Coffey <john2001plus@gmail.com>
Date: Wed, Jan 8, 2025 at 2:09 PM
Subject: Failure of Minisforum UM790 Pro
To: <support@minisforum.com>


Failure of Minisforum UM790 Pro.

I purchased a Minisforum UM790 Pro from Ali Express on August 22, 2023. It arrived in about five weeks. Because of circumstances in my life, I was not able to use it until late October 2023.  The computer lasted less than 15 months.

I bought this computer because I wanted a powerful computer for chess analysis. It is five times faster than my other computer, and I often ran it at 100%.  

I was a little concerned about the heat the computer produced.  I could feel a steady stream of hot air coming from it.   I thought that it would be okay because you have advertised it as having  "Cold Wave 2.0".  I assumed that the computer was capable of running at 100% for long periods.

This morning I was doing some intense chess analysis on the computer and it suddenly quit.  I tried to power it back on, but it would not turn on.  I disconnected and reconnected the power and it would not turn on.  Five minutes after the initial failure I saw orange sparks like a tiny fire come from the left side.  I could smell smoke.  I disconnected the power.

To use an English expression, I assume that the computer is "fried."  Other than doing intense chess analysis, I have not abused the computer in any way.

I am not sure if I can get this repaired.  I don't know if the motherboard is replaceable or repairable.

I was hoping that you could advise me.

I am disappointed in the quality of the computer that it would fail this way.  However, I am considering getting the less expensive barebones model and trying to transfer the memory and storage to the new computer.  

--