Nicely done, and thanks for the links! Especially interesting to see the use of the JK flipflop for sync signals - I've not seen it done that way before, I'm going to have to think through how that works!
0:00 Overview 1:38 What is a "6502"? 2:30 Memory map 3:58 The ROM 4:43 The RAM 5:53 I/O 7:46 The PS/2 Interface 9:43 The COOR (Control "Output Only" Register) 10:32 Reset and Buffering 12:29 So Where do all the Clocks Come From? 13:57 The Framebuffer 14:13 VGA Blanking 15:18 Address Bus "Tristater" 15:44 Video DMA 19:43 DMA Offset 20:59 What's Next?
Thank you for an updated trip down memory lane. I built my first 6502 machine in 1978. Connected an 8 inch floppy disk using the WD1771 to it, 48K of dynamic RAM and a 1702 EPROM as a boot loader. Fun days.
Very, very nice design and build! Simple, elegant and inbued with the classy "tricks" I have seen in professional designs from back in the day (1982 or so). Really excellent design. Well put together video, too. Simply awesome!
i am an old user of 6502 with rockwell aim 65 does your project support data from tape recorder ,what type of storage data will be supported is it possible to add other programming language as fortran, basic and forth that will be stored on swappable rom . do you expect to sale blank diy assembly board
I’m currently working on the tape interface - that will work with pretty much anything that can record and play audio - I’ll be showing off saving to reel to reel tape and to/from Audacity on a modern computer in a video “soon”. Kansas City Standard 300/1200 baud is what I’m going for. Of course getting data to RAM is even easier with my RF boot loader (check out my other videos). (And from RAM with some modification) “Soon” after that I will get Basic running and demo that. Maybe some C code after that - though I think new old hardware is more fun :) The gerber files are available on GitHub so it’s easy to order PCB’s from somewhere.
Happy you also found the Discord server. For anyone else wondering: There are currently two gerber zip files in /hardware - one tested b2 and one untested b3 (that I'm confident works as intended) - link to Github in the general description.
Nicely done, and thanks for the links!
Especially interesting to see the use of the JK flipflop for sync signals - I've not seen it done that way before, I'm going to have to think through how that works!
0:00 Overview
1:38 What is a "6502"?
2:30 Memory map
3:58 The ROM
4:43 The RAM
5:53 I/O
7:46 The PS/2 Interface
9:43 The COOR (Control "Output Only" Register)
10:32 Reset and Buffering
12:29 So Where do all the Clocks Come From?
13:57 The Framebuffer
14:13 VGA Blanking
15:18 Address Bus "Tristater"
15:44 Video DMA
19:43 DMA Offset
20:59 What's Next?
Thank you!
Nice design. Great functionality for such a compact design that stays relatively true to retro device use. Awesome work. Kudos!
based and 6502 pilled
Great stuff! Solving the v/h sync signals with the 109 was really neat, haven’t seen it in use before.
Thank you for an updated trip down memory lane.
I built my first 6502 machine in 1978.
Connected an 8 inch floppy disk using the WD1771 to it, 48K of dynamic RAM and a 1702 EPROM as a boot loader.
Fun days.
Oh, a rich bastard!
😉
@@Theineluctable_SOME_CANT In 1978 an 8 inch floppy drive was $100 +/-. On ebay today they are $200 !
@@donvukovic7440 I was thinking of tge RAM...
@@donvukovic7440 yes, but...
Inflation!
(And crazy consumer nostalgia demand)
I notice you are no economist!
The VGA output is especially impressive.
Very, very nice design and build!
Simple, elegant and inbued with the classy "tricks" I have seen in professional designs from back in the day (1982 or so).
Really excellent design. Well put together video, too.
Simply awesome!
You do a great job
Nice job
Nice video, thanks for sharing, like it :)
nice project
on the PS/2 Interface schematic, what is the 0O (The first symbol has a slash through it, is that a Zero?) Net Port/ signal?
It’s PHI0 - the 6502 system clock.
i am an old user of 6502 with rockwell aim 65
does your project support data from tape recorder ,what type of storage data will be supported is it possible to add other programming language as fortran, basic and forth that will be stored on swappable rom .
do you expect to sale blank diy assembly board
I’m currently working on the tape interface - that will work with pretty much anything that can record and play audio - I’ll be showing off saving to reel to reel tape and to/from Audacity on a modern computer in a video “soon”. Kansas City Standard 300/1200 baud is what I’m going for. Of course getting data to RAM is even easier with my RF boot loader (check out my other videos). (And from RAM with some modification)
“Soon” after that I will get Basic running and demo that. Maybe some C code after that - though I think new old hardware is more fun :)
The gerber files are available on GitHub so it’s easy to order PCB’s from somewhere.
Hi, Is there a link to the gerbers for your latest version of the 6502SBC?
Happy you also found the Discord server. For anyone else wondering: There are currently two gerber zip files in /hardware - one tested b2 and one untested b3 (that I'm confident works as intended) - link to Github in the general description.
Stop smoking, it is very bad for tape-recorders.
I'm happy I quit a long time ago :)