Відео

Thx a lot! Juat joined!

thank you sir for sharing your knowledge

Why did you (or maybe it was UA-cam itself) delete my last comment about where to download KiCAD? I only asked what version you were using and mentioned that version V9.0 will be available in January 2025. I was only trying to be helpful.

such a great explanation thanks a lot

This is my level Paul

Great Video Thanks

HI ! I had a very very hard time learning Kicad 8 only completed 90% before that i used to manual work of drawing trace on pcb and etch it . Can you please tell me how to change the track thickness in um although i have installed a different automatic track routing app on my PC second when ever i print a copy of Forward copper or bottom copper on paper i dont get precise dimensional measurement on the paper i get few mm ( atleast 6 to 9 mm ) under the desired measurement .

Whilst trying to get up to speed on KiCad, I've watched a lot of Tutorials and this is by far the most useful video I have found online. The AutoRouter is an amazing tool and I've not seen this anywhere else. Many thanks!

That core memory module was used in a Facit 1125 made by Sharp. It was also branded as an Addo-X 9958 and Burroughs C3350. I have the Facit model that isn't working. (Core module SN: 8070015). Hopefully I can fix it.

Pretty amazing to watch it working the puzzle. I see no reason this cannot be done to perfection with the right coding.

Just bought my second 1200S. Great instruments..

What if I am doing RF tracks and need curvy tracks. No hard angles ?

This is incredible

Thank you very much de w0it

Autoroute creates ugly layouts. They will fail in EMC tests and reduces producibility. Very seldom used in professional field.

Very interesting, thank you!

I see in the shematic there are 4 nand gates that are part of a 74ls00 chip. When the schematic is imported into the pcb layout they are replaced by the pinout for the package. Can someone point out where this is explained? wher do the breakout symbols come from and how do they get related to the package symbol?

IT HAVE NO SOUL !

Great vid. For some of the “youngsters”, who started using computers after core memory was no longer the standard. Occasionally, you would get what is called a “slow bit”. The ferrite core wouldn’t flip to the opposite direction within the allotted time of the write cycle. One place I worked had this happen. Obviously replacing one ferrite core, in the field, was not possible. Sadly, I don’t remember what the manufacturers engineer did to remedy it. It seems like we were able to proceed with processing after the engineer worked his magic.

This is an excellent video, thanks so much for taking the time to make it. Now I understand how db's work! Thank you.

That MinPro looks like my XGecu Pro.

Great instruction. Very helpful. Thanks a lot.

hi mate could you be having schematic for this project

Very nice project. I have exact the same memory module since 1985 or so. After seeing Curious Marc's video's about core memory I wanted to connect my module to an arduino. Your video is very helpfull. Perhaps I can find the energy ( due to long covid not much energy )building my own version.😊

You should connect any inputs of unused gates or inverters to either VCC or GND. Floating inputs may cause the device to oscillate.

You missed a trick with the video title, mention Arduino and magnetic core memory and the hits will go up. Everyone loves Arduino and obscure applications. Great explanation and implementation.. 👍👍

The days of over clocking made easy. 😄😄

Excellent video. Thanks!

Should have filled the empty space with a NOP slide for if it ever got out of your loop.

I want a 1200S, i already have the 1200SRA and would swap my Marconi 29555 for a 1200S..!!

I'm not sure, if auto routing is ready to go. Even this is possible since some decates, the results are not impressive, due to the lack of absence of information in the netlist. I guess the result will not perforne pretty well in EMI for example.

It really is amazing,

Where is the fun in this? Just an excuse for the lazy elements to learn nothing but obtain code and pass it off as their own.

Cool!

A full project! from magnetics to pcb to coding ! Great you can store a sentence in magnetic cores!

wauw that"s something i always want to do...

Thank you.

Good job excellent content👏

Really well explained, thanks. I need to disassemble some MC6802 so looked at the 6502 as there is more info and videos on the more popular cpu. The general idea is the same.

Very well explained, THANK YOU

I have found, that with Kikad, the reason that the Ground plane does not fill all of the area's like in your video (it does it to me) is because the routing of the traces, leaves those area's without free access to GND. You will find, upon looking, that the area's are completely surrounded by traces, or even socket pad clearances. I put a ground plane on the bottom layer and it did this.

Next challenge get the rest working. Do a dump of the core!

Hi Paul, Kicad as of recently included FreeRouting as one of the Plugin options. Check it out, makes it quite a bit quicker and more seamless to use.

I didn't see how you took your pencil written schematic and made it into the digital version. I'm new to KiCad and trying to replicate a board but the learning curve to do that is very steep.

Why not use a 1MHz crystal and a couple of inverters? If present and available of course...

Takes me back a few years. Back when I was in 6th form I had an Acorn Atom (the machine before the BBC computer), and no printer. The college had an old KSR33 110 baud RS232 terminal. I knocked up a level shifter from an op amp and a couple of lab power supplies, hooked the printer vector to some code I wrote to convert parallel to serial, wrote a 6502 disassembler in BASIC and printed out a dump of the Atom ROM (4K in size IIRC). Software and hardware have improved a bit since then😊 Sorry I didn’t see your correction in the description for the previous video, they don’t show up on an iPad unless deliberately clicked.

Beautiful work .

Erm, the Raspberry Pi is built with a microprocessor, not a Microcontroller. While the Broadcom chip is considered to be a system on a chip, it doesn’t host RAM, ROM etc, and most importantly from a Microcontroller point of view it doesn’t provide deterministic execution time. The ARM Cortex A series processors are designed to run code as fast as possible (using high internal clock speeds and cache memory). The ARM Cortex M series are designed to provide deterministic performance (they always take a given number of cycles to execute a given piece of code) and have on board RAM and ROM. The Cortex R series are specialised to handle real time tasks that require immediate response.

I enjoyed the series of videos for this project I am fortunate I own a licenced copy of Orcad 17.4 professional although a steep learning currve it makes the job a lot easier looking forward to another series of videos like this one

I see U2 and U3 power pins does not have ant pin numbers but the wires are coming out this is confusing to anyone reading the schematics also the processor U1 would have probably been better upside down with pin 1 at the bottom of the pcb but keep them coming you're getting there