The Pony80 Overview - My z80 homebrew computer!
ฝัง
- เผยแพร่เมื่อ 9 ก.พ. 2025
- Join me as I build a Z80 based 8-bit computer from breadboard to printed circuit boards.
ponytailbob.co...
Please visit my website: ponytailbob.com
Also, my Patreon site is: / ponytailbob
And join me on Twitter to keep up with new videos! / ponytailbob
Looks like a very well planned out project. I like how you've made it modular and expandable.
Thank you. I am using this experience to re-do some of the “mistakes” I made in the first attempt. The computer that I built works remarkably well, but I still see room for improvement.
Looks interesting - My first computer (Feb 1980) was Z-80 based. Looking forward to your progress.
Looking forward to the journey :) Be sure to tell us where you're getting your boards made and how you design them! Oh, and please take a look at the audio normalisation. I had to crank TF out of the volume on that one and then the full-volume ads at the end almost blew me off my chair!
Thanks for the feedback. And yes, I will be posting links to where I source my parts, and where I get my boards.
Very nice project.
Thank you! Cheers!
For someone with no training your PCBs look good. Not perfect, but good. Make those power lines *thicc*!
Thanks! So far I haven’t had any major problems.
Great work, It's the kind of project I like so much.
Thank you! Cheers!
Courious start of channel. Well, to be honest, It's my first time on TH-cam being "involved" (aka seing the first video) in the start of a channel. Well done! Good luck.
Welcome then! This is the first time I am creating a video series.
This is really something! 👍 Keep it up.
Thank you!!
@@Pony80 🔥🫡
Nice! Looking forward to seeing the build!
Thank you!
awsome project reminded me of an old macintosh how card plug back then
Thank you!
If you make sure that the memorymap can go to all RAM you could run CP/M.
Could be nice to go forward to MSX standard
That is one of the modifications I will make in this video series. My original was static mapped to 8k ROM and 56k RAM.
It is interesting.
My first computer was a Z80 powered Osborne my got in the mid 80's.
I have been thinking about building a Z80 computer and this project maybe just what I am thinking about.
Thank you
I grew up with a Commodore 64 so I always turned up my nose to a z80.
I am kicking myself because it would have been a great learning experience. Ahhh, with age comes wisdom.
Wow, amazing video. I want to know if this can be done with 8085 microprocessor. I mean i want to see a homebrew computer made using 8085. Its just a suggestion from me.
I’ve been researching the 8085. Looks like it would be a fun project!
@@Pony80 Yes 8085 is very interesting.
Can you tell me how do you make the PS2 interface? Im building my own computer with a Z80 and Im already make this display some characters in a 16x2 display with an old PS2 Keyboard that I have using only some flipflops and a bunch of logic gates. Im now pretendind to interface the PS2 keyboard with a Basic OS but the project that I made was a mistaken. Every key that is pressed the logic gates to interface the keyboard send a INT pulse that makes the Z80 jump to a specifc part of my code and this type of interrupt dont work well with the Basic and the "bios" that I found because its use the Interrupt Mode 2. Im not understending how to make this two thing work together. Thank you and please continue with your work, ypour project looks great!
Yes, the ps2 keyboard is going to be included in these videos. Up to that point, it was the biggest challenge that I encountered.
@@Pony80 thankyou, I'll wach it!
And, I might add, this part was for me the most challenging. It took me many tries to get it right.
I fear the VGA interface is going to be worse!
@@Pony80Probably will lol, Im pretending to use a TMS9918 but I didint even started to this part
😂
Is bus RC2014 compatible ?
No, I designed this before I was aware of the rc2014, but I may go back and change the layout in the future.
I hope the video controller is TTL or CPLD based .. none of that FPGA, Parallax Propeller, Raspberry Pico or Arduino rubbish .. I am counting on you man!
YES! That was all I could find, so I am challenging myself to build it TTL if I can.
I vaguely remember some Z80 designs using the Z80's built in DRAM refresh hardware to output video. You might want to look into that.
@@Pony80 There is a guy here on TH-cam that has created his very own graphics card; "the world's worst video card". Really interesting videos. If you haven't seen it already you should, will give you some good ideas.
Link: th-cam.com/video/l7rce6IQDWs/w-d-xo.html
I gave you a like but i have to complain. Your audio was too soft and barely audible. I had to put my iPad to my ear in order to hear it wit it on full volume and that was barely audible.
Thank you.
I am not sure what happened on that video, but TH-cam has no way to correct it once it is uploaded. It doesn't seem to have happened on the clock circuit video.
Wow! That's huge! That is the content on TH-cam that I very like! Can't wait for furure updates!
BTW, do you have Twitter?
Thanks. The next video is almost complete and should be up in a few days.
I don’t currently have a Twitter account for this. I may add one in the future.
@@Pony80 Good to know that! Thank's for sharing!
Twitter is @PonytailBob
@@Pony80