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evlthecat

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Everything posted by evlthecat

  1. Hail Cezar! **I couldn't resist** Glad you found the site, have a great time! Lots of friendly people, so if you have questions, feel free to head over to the Support Lounge. Have a great weekend!
  2. It really depends on what your personal goals are. I love programming in C, but decided that for a machine such as the commanderX16 it is impractical because of the overhead. If you have never programmed, I would suggest starting with BASIC and get a feel for the system. Then as you understand the memory mapping more and how to access it, move on. This could take as little as a couple of months depending on your dedication. If you are a seasoned programmer, or have a handle on one programming language, and understand how memory addressing and mapping works, go for assembly as @SlithyMatt suggests. There is nothing more frustrating for a beginner, then to drop themselves into something others perceive as easy, and become discouraged and quit. Small victories win the war! Have a great weekend!!
  3. Maybe it was PSpice? I remember that is what we used in Digital Logic..
  4. I need to get rid of the stock Debian version 2.7.1. The timing is horrible and the simulation stalls all the time. Makes for a really poor simulation experience. I am not sure if this was a symptom of the machine I loaded it on or the version itself. I believe the gent above eluded to running a beta version of 3.4.5 so I am sure many update have been made. I was impressed with the amount of components available for simulation. Thanks for piping in @JimmyDansbo
  5. I am not sure if many will be interested in this topic, but being a intermediate hardware guy I am putting it out there. While I was watching the Youtube I came across a gent, CuriousMarc, troubleshooting the D-RAM refresh circuit of his HP 9825. He simulated most of the shebang with this tool to help find the problem. I was impressed since the tool was user friendly, well documented and free. Link to git hub Logisim-Evolution. Evidently there is an alternate version called Digital based on the same original work. If someone tries that one let me know. https://mrmcsoftware.blogspot.com/2017/03/testing-and-improving-my-cpu-design.html
  6. 1) Mostly, people are involved with support software development for the future platform. The emulator can be downloaded via the 'Download' page, and follow the link for the cc65 cross-compiler development page. 2) The hardware development is out of our hands, as it being run by a core group driven by the 8-Bit Guy. See the 'X16 Discussion Lounge' for updates and to ask questions. 3) I will warn you, they are strict about the rules see the 'Main Forum' page at the ; and the hardware platform form factor is pretty much final, so discussing change ideas will be met with a lot of resistance. Have a great weekend!
    This game is pure evil! I had to get my 13 y/o to try and get past level 5 needless to say he rubbed it in mercilessly. However you have done a wonderful job propagating it to the x16!
  7. I will be honest.... I broke the seal..! (DOOM! DOOM! DOOM! ) and poked around. I did find something very curious on opening the lid. I guess someone on the assembly line autographed it?! Anyone ever run across this before? I did verify it does have extended basic installed and I found a Tandy TSB in regards to the 64K Byte memory and verified the RAM chips as 100% good; but for now, 32K will be fine. It seems very few programs utilized the CoCo 1 64k anyway. I decided to use a gentler approach with this CoCo, thanks to the poll above. Since all the necessary signals for composite are at you finger tips, I decided to build a piggy back circuit, which doesn't modify anything. That way, I can at least get it hooked up and running to verify it works, and fix it if it does not. Have a great weekend everyone!
  8. Looking great! Can't wait to see the new PCB, enclosure and it in action! Keep us updated.
  9. Bem vindo ao grupo. Se voce tiver qualquer duvida, e so perguntar. Tenha um otimo fim de semana!
  10. I love the Attiny85. Very easy to work with, has most of the bells and whistles its bigger brothers have, and very hard to blow up! It interfaces well with the I2C MCP23017 I/O Port extender if you need more room. I don't use Arduino software, but I would guess there is a library for it. If not I have written one in C if you are interested. I haven't had the time but elm-chan has put out a library to interface it with an SD card. The library is called Petit FAT File System Module. I used its bigger brother in the 2560 project. I love the challenge too, but I put things on hold so I could re-learn 65c02 assembly. I am going to take a couple of months to see where I can get with it, and then depending on where the commander X16 is, reevaluate. To many projects so little time! Wonderful, I will be looking forward to it. Might take a look at EasyEDA. Do you need to make a minimum purchase; as I remember that is what turned me off originally? You had to make a minimum order, and the price was steep compared to just making a perfboard prototype. However, this was several years ago. Thanks and have a great weekend!
  11. @Strider I would like to know how this works out for you. I have never done this either, and I would be curious to know if it is worth it. I am the same as you, always made my own boards. I thought about that new 3d board printer, but am very weary to sink high dollars into something for personal projects.
  12. My project arcade had 3 microcontrollers executing various functions all communicating via the I2C bus with the Raspberry Pi. The the first microcontroller is a Arduino Pro-Mini used to drive the arcade buttons, which interface with MAME. I have a script that decodes the MAME hardware setup file for each game and lights up the buttons according to how they have been programmed in the in-game control menu. The script also takes a default setup, so for all the other emulators I just hard code the button setup in. The second project houses the Mega 2560, which drives the scrolling LED display, and interfaces with SD drive for the display data for each programmed game. The short coming for this project is that I never off loaded the character set onto the SD card storage, so the character set is made up of only uppercase letters and stored in program memory, which eats all of the space. This interfaces with RetroPie, a script passes the data to a driver, which passes the game code via I2C to the 2560. I programmed in a clock w/ alarm, and this interfaces with the final project. The final project is another Pro-Mini, which drives an MP3 Audio Module and is loaded with various arcade sound clips. This plays, and the Pac-Man ghost eyes blink at random intervals. There is an IRQ setup when the programmed alarm goes off from the Mega 2560, or it can be controlled via momentary button push on the panel. The connection between the 2560 and the Pro-Mini was an after though hack, and overall the total project really needs to be re-written to be more cohesive, but hey its my arcade and not a commercial venture so it will probably never get done. I’ve move on.. I just finished at the end of the year 2020 a pwm joystick for the TRS-80 using an ATtiny85. The prototype seen, has two chips the final joystick has a single micro. That was a fun project! To get to the final design I had to build a high voltage serial programmer to program the fuses so I could use all the pins. That has a Nano driving it. I am currently redesigning the serial programmer board to include a serial debugger on the top section of the ZIFF socket so as I make changes, then I can move to the top part of the socket and test. I am hoping to make this into a plug in card for the commanderx16 someday.
  13. Great point @SlithyMatt. Honestly, I know this isn't some earth shattering find, and I really am not trying to make it into something bigger; It is a common machine and a later model TRS-80 Color Computer 1 for that matter. I am just curious if opinions differ. For instance, I am not a fan of Retro Brighting, but I would never begrudge someone doing it.
  14. Thanks for your thoughts @TomXP411. I was doing some reading on this model last night, and from what I understand it can be loaded with an extended basic ROM and may, depending on the memory chips, be 64k. But the only way find out is open it up. Right now it isn't a priority. I have 2x 64k Color Computer 2, and have one modified with all the bells and whistles. Like I discussed it just blew me away because it looks to be untouched. I have never seen this before buying secondhand equipment. It was truly a shame that the corner was busted, it would be a museum piece then. I am working on a Toshiba T1000 right now, so I am going to put this one away and keep it in its virgin state. Maybe somewhere down the road. I was more curious as to how other feel in reguards to older equipment, and their opinions on modifying it to make it more modern. I mean some of us probably came here because we watch retro youtube channels. Most of these gents, modify, retro bright, rebuild etc.. I was just wondering if there are others who are strictly opposed to these practices. Thanks for everyone who has participated!
  15. I recently acquired a TRS-80 Color Computer 1, sight unseen from Goodwill, and something happened that I normally don't even think about with retro systems; it is in unused condition. I couldn't believe it!! Now it does have a cracked corner because it looks like someone dropped it, but other than that, it doesn't look used at all. Normally, I would tear into it, pull out the capacitors, modify the the output video for s-video, add an amplifier and sound output, upgrade keyboard, etc.. However, and I don't normally care, should I modify something so obviously unused? For God sake the warranty sticker is intact. Anyway, if you feel like letting me know your thoughts, I have included a little a poll. Thanks, and have a great day all!
    Chickenlips Forever!! Love the demo! As soon as I began to wonder, why the picture of Tutankhamen, there was the explanation scrolling across the screen! Great joB!
  16. Love the pun! Welcome!. Lots of nostalgia here to go around.
    I love how the chickens lay eggs and their gradual develop. It's the little details, like the chick eyes blink at a variable rate right before they mature, that catches your attention. Lots of potential here!
  17. Great introduction! Glad you are here! Lots of friendly people with diverse ideas and goals. Have a great day!
  18. I started my Toshiba T1000 recap and battery pack upgrade.  Waiting for parts is a horrible feeling... This one was a tough cookie to de-solder so I need a break. 

    A lot of great resources out there for this model.  Especially, The Brassic Gamer: Toshiba T1000

    T1000_mainboard.png

  19. @wahsp, I don't think you are rambling or oversimplifying. I think black box is a very apt description, and your insight is keen. I believe there is a concerted effort to keep people from understanding the technology they purchase. All one has to do is look at the stiff resistance against the right to repair movement going on right now. It is a double edged sword, manufactures don't want to give up their trade secrets and glean huge profits, but how do we wrestle with the societal problem of being a disposable world. A perfect example is, it has been proven beyond doubt, that these same manufacturers are manipulating their technology just to die so consumers have to dispose of, and buy a new product. This is deceptive and manipulative. That is why I will never buy an Apple product again. Where do we start drawing lines as consumers? I know it seems crazy, however, this is why I have purchased what others would deem antiques. Not for the aesthetics, but for the functionality, durability and ease of maintenance. I remember a lot of my curiosity for electronics came from reading the documentation that came with products. Back in the day turning the pages of a users manual was an adventure, especially the appendix, today it is a jungle of legal ease and warnings to Darwin award winners. If it comes from China, the doc-o is barely intelligible.. I think, just by having a place to go to exchange ideas, like we are, is the best resource for those kids out there who continue to explore and push their limits. They are out there, and looking through the Internet for support. I know I have mentored several young people myself, and the things they all appreciated were adults who listened when they had questions, and didn't make them feel inferior. Want to change the world, lead by example. Have a great day all! P.S. I ramble..
  20. Agreeing with @Strider here, The problem today is computers have become common place to the generations from the 2000's forward. They don't see it as magic voodoo, which can be conquered. They view it like we see the refrigerator or microwave, something needed but not that interesting. They tried this idea with the Raspberry Pi when it came out in the UK. Building whole school curriculum around it, but in trying to make it accessible to everyone, dumbed it down so much it became nothing more then learning Python and hacking together pre-made hardware kits. The industry doesn't help either; universities teach the most clicky computer language, and promise a 6 figure salary on departure; businesses fall all over themselves catering to no talent hacks who have no qualms about lying about their perceived qualifications. Hardware does not come with any documentation anymore, on purpose. Science fiction both in film and book format has succumbed to anti-science ideas, where whatever you throw up and stick is what they go with. And the new war on math has pretty much sealed the fate of our future generations, unless the trend is reversed. I have been homeschooling my sons for 10 years and considering personalities, only one is interested in technology. I have a pretty good lab at home, and I have been including them in the various stages of building projects; from design, prototyping, soldering, program interfacing, etc.. and I can barely pique their interest. For kids it all comes down to what their friends or buddies are into, and most kids today, that is little more then playing life like video games. When I was into the C64 as a kid, all my friends were into the same thing or similar. Games were only one part of the computers in the 80's, and today gaming systems are not computers. To be honest laptops are uninspired, and desktops are nothing more then Frankenstein's monster gaming systems, and phones have pretty much dominated them both in use. Unless you can convince a generation of school children that electronics and computing is cool, it simply will not happen. I would love to see a retro revolution, but unless we rescue our schools from the death spiral they are in, I honestly think this ship has sailed. Sorry about the pessimism, but I have devoted many years of thought and action to trying to do exactly what this topic calls for. Parents have to understand there is a problem before it can be addressed, and this simply is not a problem for most people in the U.S. today. Have a great Sunday!
  21. <!There seems to be a reoccurring theme here !> Personally, it is because now that I am an old fart with grown up teenagers, and their growing interests in other areas, I find myself reflecting on those things which made me happy in my youth. Call it a nerds mid-life crisis, I guess, but I remember feeling like I had all the time in the world, freedom to explore where technology could take me, and a mind like a sponge. For me, retro computing represents reconnecting with the path I left for stability; a career, and family life. Modern day games never appealed to me; if I want manipulated reality I can just turn on the T.V.. There is to much safe space in modern game design. Not what I am looking for. IMO, 8-bit games are a true test in maximum imagination with minimum resources; the ultimate challenge to see how far you can push ideas to a breaking point. I may never amount to much in the 8-bit world, but I for one recognize how fortunate I am to be able to relive a time in my life when computing was on the cutting edge and the future was wide open. <cue the synthwave> Have a great day all!
  22. Anyone looking to score an Amstrad Portable Computer PPC640? They have on auction at "shop goodwill dot com". It is damaged not sure how bad. Have several other systems there too: TRS-80 1's and CoCo 2; IBM 5150 Computer W/Keyboard; an Atari 130XE, Commodore 64; Commodore SX-64 Executive etc.. Just throwing the idea out there in case you don't know about the Goodwill store and are looking for hardware.. This one threw me.. Never knew it existed.. @Strider if you consider this a hijack of the thread, let me know and I will open it up under another topic.
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