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...when someone who is far better than you finishes a project you wanted to do in the past and tells you that he messed up and you're glad that you've not even tried, but now you've got an a.. full of ZIF-Sockets....

That's why nearly all PCBs in the wild start at Rev 2.0. Most of us mess up Rev 1.0, and if you ever see a Rev 1.0 board, it probably has mod wires, mod boards, or some oddly placed components.

A great project and great support but nothing is absolutely perfect especially with the limitations of the Arduino.

Maybe the solution is to use an Arduino mega. More available pins

Awesome job Anders! Time for modding, so I actually can test the code in reality. I just love to support your project by Firestarter.

yaaa bro super sensitive to green...... we used to be hunters we needed to distinguish our food from the various things undergoing photosynthisis everywhere around whatever animal we were after.

An absolutely enjoyable Video on single stepping a old 6502 CPU, I'm repairing a Microtan 65 Full-System built into a 19" Rack, it mostly works but some of the Eprom's don't seam to be getting selected. I'm in England, what would be the postage cost for the ready built stepper. Thanks

Murazik Terrace

can you replace the microcontroller with a teensy? i have never seen a mod before.

The M2 was a low-cost version of the Model M which shipped with the original PS/1. Yes, a low-cost Model M...if you consider that the original Model M was a cheaper to make successor of the Model F.

Incidental sound used to be used as a computer diagnostic tool. The Ferranti Pegasus I and the Elliott 803 and 903 computers all had speakers which were used to "listen" to the computer executing code, and on the Pegasus I it was sometimes used to produce music. Even the 920M which was an IC version of the Elliott 903 computer made for the military had a facility for one. There is the guy who hollowed out an DIP ATtiny84 and put four LEDs and four momentary switches inside the extra space around the IC to make a Simon clone. It only needs power and a couple of pins for a speaker.

If I could think of one guy who is an assembly language prodigy that would by Chris Sawyer. He wrote the original Roller Coaster Tycoon almost entirely in x86 assembly, with just a small amount of C in the GUI code.

Is it just me or is the speaker in a 5160 louder than the one in a 5150? I have had both, and when I put together my 5150 back in 2010-2011 I noticed that the speaker in it was disappointingly quiet compared to the 5160 I had as a kid. My 5150 is from 1983, the year I was born, but I'm not sure when in 1983. I guess I need to look at it again. It actually has very low hours since it was originally a diskless system which came out of a trial of a CCTV based training system at a fort on the east coast.

Hi Score in hex is the nerdiest thing I've seen lately 😃

Well done!!!

Hehe. Pretty awesome stuff. I bet you get a few finger indentations playing that for a while :-)

Amazing in such a small package!

Hi, will you ever return to the "bios/pong" asm project?

Join the free hackerspace clubhouse on Discord: discord.gg/kmhbxAjQc3

great video

I wonder how much work I would need to port collapseos to this, I know there is an Apple 1 build of CollapseOS If DuskOS on an RPi is a godsend for the specific breed of hardware hacker I belong to, collapseos on this thing would be just as great we got a whole bunch of arduinos at the hackerspace I visit in copenhagen, I should be able to "complete the chain" with this thing, actually. It is amazing, supply chain resistant salvage computing is the way to go for me. Thanks for contributing with this device!

Me: can we have Apple 1 at home? Steve:

Thanks, this was a great video. Really, peaked my curiosity. As with the Cycle Board, there are 3 buttons. When this run button is up, is this run at full mode, while pushed is this the debug mode? As per the Cycle/Instr button, when this is pushed down, is this the Single Cycle mode?

😢 Wanted to give it a go but says cannot ship to UK. Strange, have no issues from other EU countries.

I watch so many repair videos for capacitors and after doing the same kind of repairs for 5+ years, I find it astounding how many people seeking to preserve electronics with potentially leaking electrolytic caps don't replace with ceramic or tantalum ones. Replacing like for like with electrolytic is just resetting the clock on the time bomb. The arguments I've heard are "well, I used what I already had" or "they're cheaper" or "the solid ones are less tolerant" but after using tantalums and ceramics for many years I have never ever experienced any issues with them. And if they do fail they simply short - rather than destroy half of the board it sits on. So anyway, thanks for the guide, as I'm about to recap one of these, but maybe take this suggestion on board - try some ceramics - which are even better because they're not polarity sensitive!

4:24 I believe some of this solder joints needs to be resoldered

0.3mA is alnost two orders of magnitude lower! The 20mA rule of thumb is very simple. It is by and large the most common maximum rating for current for many LEDs. It is not to be exceeded, so using it as a rule of thumb just means getting the brightest possible light with no risk of burning out. I generally use 0.25 or 0.1mA for modern blue or green LEDs as indicators

The 20 mA "rule" is about 20 years out of date...even in 2005, we were using 15-20 mA for LCD backlights in mobile phones, and the output at 20 mA, 20 years ago, was eyeball-scorching, when the LEDs were viewed directly!

The title should read "$9", (nine dollar). Dollar sign goes to the *left* of the number.

Glad to see this video :) Many years ago, I wanted to try a homebrew but wanting to play with single/manual clocking, I ended up getting a 65c816 (the 16 bit version of the 6502) Never even tried it with the original.

Great project that just keeps getting better. Good job!

Hello 👋🏿

Kits are here! www.imania.dk/index.php?currency=EUR&cPath=204&sort=5a&language=en Join the free clubhouse on Discord: discord.gg/kmhbxAjQc3 Let's chat about what you like best about old chips, electronics, breadboards and hacking all sorts of things!

HA HA HA "ready for more abuse" It's so good!!! 🤣🤣🤣

Why lies? There's two versions

This was a great watch, here's my comment for the algorithm gods! This channel needs more subscribers!

The world is past this.

The world is past this.

So the 65C02(1981 - found in Atari 8bit XL/XE and some later 800/400 models)essentially has the halting circuit onboard? Since later Atari 800/400 motherboards could accept the 65C02 does that mean that a similar circuit to yours exists on their earlier motherboards?

Now to give my 5150 a work over and add an extra five to that number!

The Atari VCS (2600) WSYNC register in the TIA causes the RDY pin to be deserted, until the next scan line. This is CRITICAL for display timing.

great !!!!

Can this processor run windows?

Is this true ?

Another mildly irritating feature of the original 6502 is that it ignores RDY on write cycles, so if you need to slow writes you have to resort to clock stretching. I guess this made sense at the time, since RAM was faster than the CPU anyway and you normally only had to add waits for ROM reads.

Kim-1 had single step button.

Now try this on a Z80. It uses capacitors as temporary bit-storage elements. If you wait too long, capacitors discharge. That's why it had a minimal clock frequency. EDIT: I should've watched the first minute before commenting. Of course the Z80 can also be put in wait state, so there might be a way around it (although, I don't think it has a 'sync' pin)

i mostly just heard to get the cmos version becsuse they're easier to find and interface with modern othrr chips

Guess of what this is a step towards: Making a computer that is in a function and form factor similar to an Altair 8080, but using a nice 6502 chip instead of an 8080.

What shocking news, I had a 6502 on my bike and could never work out why I had to keep peddling. The shop that sold me it said it would certainly cycle, I took it back and he said I must have installed it wrong. It never worked properly and now I know why, so after showing the shop your video I asked for my money back. He said since I bought it over 10 years ago it had probably has failed anyway. So if you can make known to all cycle outlets of your findings, this will help a lot of people.