Відео

Он все еще функционирует?

@@RetroRogersLab не совсем. Заедал левый рычаг и не уследил за младшим (первоклашка) и он заклинил механизм. Попробую разобрать устройство и устранить клин.

@@RetroRogersLab на сколько знаю от отца, дед использовал вычисления чтобы построить трактор. Дед до Великой Отечественной собирал дизели для подводных лодок, а на Великой Отечественной был механиком-водителем. Инженерное образование и вот этот калькулятор позволили собрать трактор.

Glad this ole video was there to help! :)

I haven't done much with it. I did remove the cover and clean out all the Styrofoam. A couple of the indicator wheels in the accumulator register are scraping on something. Some of the paint was scratched away from the numbers. I found some service type videos for similar models so I'm slowly getting comfortable with the idea of tearing it apart for a full restoration. Also, I found another good deal on the same model so now I have two. I figure I can mess around with one and use the other as a reference. If you have links to a service manual or other technical material about these, would you share them with me here?

Thanks for the encouraging words! I'm working on the script for the next episode and have an exciting announcement for the project.

Yeah, I wish I had one that did that.

@@RetroRogersLab I "misremembered" ,,, It was a PDP-8 I was thinking of ...

However you found your way here, I hope you enjoyed my video. I am also a fan of that movie. :)

@@RetroRogersLab I was a computer nerd in the 80s--mainly Apple ][ and Commodore VIC-20 and 64. We computer nerds were few back then. Everyone in school asked me if I knew how to hack into the school computer and if I could do the stuff like in Wargames. Of course I said, "yes" lol.

@@MarvelousLXVII Back in the day I had a C-64 with two 1541s and the 1702 monitor. I eventually replaced it with a PC to play Wing Command.

@@RetroRogersLab Lol yeah Wing Command cost us all money (ram, sound card etc.) Hey were you in the BBS scene on the 64?

@@MarvelousLXVII I was on Quantum Link and helped a friend run a local BBS on a TRS 80. I also set up a corporate BBS at my job back then.

Sadly yes. I do have a better o'scope now so when I return to this project I'll be able to share some troubleshooting. I wanted to get CP/M running on it but I've added the Altair and IMSAI emulators to my collection and they both run CP/M. I still want to put that "I built my own Z80 from scratch" feather in my hat!

That's amazing! Thanks!

Go to my GitHub (github.com/linhartr22/My_SAP_Logisim). Browse to the Intruction_Decoder_ROM folder. View the "My Sap_Instruction_Decoder.ROM.ps1" file. Scroll down to the row 72. If you just pay attention to the comment rows you'll see the opcodes are grouped by function then listed individually. For example, row 72 indicates the LOAD instruction group. Row 73 is opcode 00 which is the LDXA (DD) instruction. It is a two byte instructions that takes 5 machine cycles to execute (2/5). To determine what the instruction does, on row 74, the values after the -f will give you an idea. The first PC2ADDR copies the Program Counter to the Address Select Register and the FETCH_IR copies RAM to the Instruction Register and increments the Program Counter. The second PC2ADDR copies the Program Counter to the Address Select Register and the FETCH_ADDR copies RAM to the Address Select Register and increments the Program Counter. Finally the RAM2A copies RAM to the A register. In summary LDXA (DD) loads the A register with the contents of memory at address (DD). You can see the definitions for the different machine cycles in rows 34 through 67.

Thanks for your comment. While re-familiarizing myself with the code, I found a mistake with the JZ, JNZ, JS and JNS instructions. I've corrected the mistakes and committed the corrected file. I think it is great that you're doing this with your son. Awesome parenting!

@@RetroRogersLab Ha, I guess I'm old-school. I saw a ".ps" file and thought it was a "postscript" printable version, prior to when you started doing PDFs. Never even bothered opening it. I guess that's what I get for assuming! Thanks! This is going to be fun!

Thanks. I often wonder what a difference it would have made if I had managed to get my hands on one of these when they first came out.

I use an old laptop that still has an RS232 serial port. The serial to USB converters I have are +5v/+3.3v so I'd need to convert the +/- 12v used by RS232. Maybe if my old laptop ever dies. ;)

Voir le site de Matthieu Benoit, pdf download

matthieu.benoit.free.fr/pdf/Manuel-Dataio-201.pdf

@@RetroRogersLab Un grand merci !

Thank you, I will!

LOL. I don't know if they purchased the rights to it when it was produced but YT flagged it. I'm not monetized so it didn't affect my channel and decided to leave it as is.

@@RetroRogersLab Yeah at first I thought it was a trailer song from one of stock music collections, but it turns out its from a semi-famous electronic groups "Mannheim Steamroller".

@@MichaelJantzen42 I was not familiar with this piece but I have heard the Christmas Songs they perform.

@@RetroRogersLab Oh I found it was called "Fastasia/Frenetic Energy (Door 5)" from the album Fresh Aire 2.

Custom STD Bus Z80 at 4 MHz programmed in Z80 Assembly language. Similar to these: www.retrotechnology.com/herbs_stuff/STD-01.jpg. I designed the character set for the video display. Prior to that, we built some cool, custom LED displays. Blue anodized aluminum enclosure. I learned to run a Bridgeport milling machine to manufacture them.

@@RetroRogersLab Did it have long term storage, or what the report printout the long term storage?

@@MichaelJantzen42 We used a 16K Battery Backed CMOS RAM board. Once they run the report they would type a command to clear the totals. As you said, the printout was the long term storage. Also, no floating point for math. All calcuations were 8 byte ints that used formatting for the decimal point.

This project got pushed to the back of the bench so I could build an AltairDuino and PiDP-11. I'll be getting back to it soon.

It depends on the part number. 2.5, 4, 6, 8 MHz to 10 MHz with CMOS variant up to 20 MHz and binary compatible derivatives (from Zilog) up to 33 and 50 MHz.

@@RetroRogersLab how much video ram does the 50mhz version support?

@@intelsocket7430vxtx I'm not sure I understand the question. With memory management software and hardware you can address as much memory as you want. The Z80 address bus is 16-bits providing direct memory access to 65536 bytes of RAM. The Z80 does not directly support video RAM. Lastly, my experience with Z80s is 4MHz and below.

@@RetroRogersLab ez80190?

I would love to add a keypad and display to easily program and view or set memory addresses as well as the various registers. I just ordered my Ben Eater 6502 project, so I am looking forward to getting that put together, but it really needs a keypad to be useful.

@Rolf Jander Just trying to make a old fashioned 6502 trainer, similar to a KIM-1 with keypad and 7 segment displays.

Hello. Could you clarify? Are you saying if you drive the control signals manually, like using a jumper to drive them to +5V or ground, it works but it doesn't work when you try to let the ROM do the controls OR does everything except the JMP instruction work with the ROMs?

Yes, this is creative mode.

I'm using a Windows XP laptop (I don't connect it to the Internet) that has a real serial port and HyperTerminal is the program that I use to connect using COM3.

I'm not familiar with that. What can you tell me about it?

This is actually my favorite multi-rotor. However it suffers from a design flaw in the yaw motor mount. The servo shaft just press fits into the assembly it is prone to stripping. I have a 3D printer and on day I will design and print a better solution. Thanks for asking!

@@RetroRogersLab I have also built one, but because it was my first attempt at building a copter, and the instructions were so sketchy, like you I made several mistakes. However, my biggest problem turned out to be getting the firmware flashed, as I only use Linux and for a long time failed to get Betaflight to run. So it was put on a shelf and I bought a Syma to practice with, and then a Xiaomi Mi, which is great to fly. Now I am going back to building, so I will have another attempt at getting the tricopter into the air, maybe with a servo upgrade.

@@BarefootBeekeeper I hope you'll let me know if you find a better solution for the Yaw motor servo mount. I like that this frame uses big blades. It doesn't whine like a 250 quad with those tiny props spinning crazy fast.

@@RetroRogersLab I will let you know. I have also built a Tarot 680 but I need a lot more confidence in my pilot skills before I fly that monster!

I'm pleased to know you found this useful. Back in the day, before mixers were common, I used a 6801 CPU to mix a small amount of rudder input with two throttle servos for a twin engine model. It worked great!

Спасибо!

GameMaker Studio 1.4 Source and Installer available at github.com/linhartr22/GERmulator-8800

So far I only have one microprocessor design that was completely my own work. While I would be quite happy with a 64K 8080 or Z80 system the challenges of bank switching and possibly MP/M appeal to me. I'm also fond of blinkenlights. :) I'm producing a video series on my channel detailing an Altair 8800 and 8080 CPU Emulator. I emulated a serial port and wrote a serial monitor in 8080 assembly.

You nailed it! The quality of the breadboard (resistance) can be a factor.

If you follow the series you'll have a good understanding of how a CPU works.

Roger Linhart Thank you very much for your quick response! :) What you do is amazing and I appreciate that you share your knowledge here on youtube! I try to follow your series but for me as complete beginner in the subject of electronics wo tries to learn it by myself its gonna take a very long time... but it is very interesting anyways so i really enjoy the videos :D Im a software developer and have written my own virtual cpu. My goal would be a pretty basic 4 bit "brainfuck" cpu (the esoteric programming language^^) within like 10 years or so on a breadboard. :D I hope thats realistic and that I can achieve this ^^ Ps: im very sorry for my english, it gets worse because im on my phone atm hehe

If you plug the cable into the charger incorrectly, as I did, any battery you connect (or as in my case the charger) is going to have a bad day.

@@RetroRogersLab will the battery reverse polarity if the Electronic speed controller battery cable is wired up wrong and plugged the battery into the ESC would that reverse the polarity of the battery also or is that just the charger

@@RetroRogersLab could reverse polarity happen if the cables to the ESC are wired up wrong could the through the battery into a reverse polarity state if I plugged it in

I'd expect the outcome of reversing the polarity when connecting an ESC to be a blown ESC. Once something fails it is difficult to determine what else might happen. If the ESC creates a short it could damage the battery. Transients on the power could damage sensitive electronics.

@@RetroRogersLab well the battery wires to my ESC where wired backwards red to red black to black the way it's suppose to be but I did not know that I plugged the battery into the ESC turned the ESC on and fried it the battery got hot the ESC got hot and I quickly unplugged the battery from the ESC and I called Redcat Racing and I told them what happened and they said the battery is alright to still use as long as there's not puffing or swelling of the battery

A common issue with flipping is having motors or props turning the wrong direction. Confirm the motors are turning in the direction shown in OpenPilot and then that each prop is pushing air down to confirm you have the correct clockwise or counter-clockwise prop.

@@RetroRogersLab thank you for your response. I have checked multiple times.Motors are rotating in a correct direction. please have a look at my problem maybe you can understand better ua-cam.com/video/LD2lwCHusD0/v-deo.html

Hi Jeff. I enjoyed the photos and am a bit envious of you having the real hardware to play with. I'm not sure how valid it is to use this project as an Altair trainer. My focus was on the CPU emulation and the Altair "interface" was a fun diversion. I plan to emulate a UART for serial communication. This would require that I write or borrow some code for a Serial Monitor. It might be fun to emulate a paper tape reader to bring in programs. Of course this would require a paper tape punch emulator . The never ending project... To answer your question though, In the source code I can emulate ROM code by populating the array that emulates the RAM. If you don't have GameMaker: Studio 1.4 then you wouldn't be able to edit and compile the code.

Thanks for getting back to me, that looks like a really fun project. I love doing projects like yours. I found a really great simulator at www.altair32.com/Altair32code.htm It comes with a disk drive and a terminal program and a couple of image files to load. I was able to load CPM 2.2 and run BASIC-80 Rev. 5.21

I've played with earlier versions of that emulator. I decided to test out the latest version and it still has graphical issues with the switches and LEDs. I know this was an area that gave me some challenge, mostly related to GameMaker: Studio, so I won't be to critical of this.

@@RetroRogersLab Thank you, keep me up to date on this. I would love to see this working. I have not received my Altair yet, as there seems to be a problem with one of the inverter chips, on the front panel. He has not gotten around to replacing it, as it is difficult to test, to see if it is bad, as it only gets a single pulse, to test if the switches are in the up position on not. You can see in this video, after he hits the examine switch, A6-A11 go high, even though the switches are all down. drive.google.com/open?id=1Zeh6D76Aj0-NZFUOJlosx3T3kXKhML3T

I'm still just trying to get over my fear of disassembling this one. My success (or failure) will determine if I have an aptitude for it. My eyes and fingers (heck, pretty much, most of me) doesn't work as well as it used to. During early disassembly I removed one of the pieces and realized I had overlooked a linkage arm. I had sudden panic there might have been a spring attached that I'd never find. It turned out just fine and I returned the piece to its original location without issue. I'm very close to releasing Part 2 showing the disassembly.

I tend not to disassemble unless it’s absolutely necessary, and will only do it if I have nothing to lose - the worst that can happen is that it still doesn’t work! If a machine is a little stiff in operation but is otherwise OK I usually just take the covers off for a general cleaning and light lubrication.

Hi Michiel. Sounds like you were only able to find the French manual as well. It was inconvenient and I did use Google translate a few times but I was able to figure out most of the functions from those instructions. Here's a link to my Google Doc containing what I did translate: docs.google.com/document/d/1GT9-QcOCZtvRTH5vcCg4VRjcTzSYeeLAZlH0winXrnM/edit?usp=sharing I haven't looked at this in a while and I didn't check to see how much was left to translate. I seem to recall the document was images, not text, so I had to type the French into Google. It isn't too picky about the special characters.