Back in 2002, the 6502 disappeared out of all cataloges.
Wanted to know, if it's possible to build a binary compatible CPU
with the things I had in the drawer:
74LS parts, 27C512 EPROMs and a fast static RAM from an
old 80386 motherboard.
Now here the results.
Note, that the Bus timing is different from the 6502.
The CPU:
| File | Description |
| cpu.txt | short description of the CPU |
| system.jpg | big picture of the Computer |
| cpu.jpg | CPU from the side |
| cpu_1.jpg | CPU, PCB 1 |
| cpu_2.jpg | CPU, PCB 2 |
| m02_3.zip | Eagle3.55 schematics, layouts, SourceCode. |
Schematics in JPG format:
Other pictures:
| Datei // File | Beschreibung // Description |
| crt.jpg | CRT von der Seite // CRT from the side |
| crt_1.jpg | CRT, Platine 1 // CRT, PCB 1 |
| crt_2.jpg | CRT, Platine 2 // CRT, PCB 2 |
| mem.jpg | Speicher // Memory |
| irq.jpg | Tastatur, IRQ, Reset // Keyboard interface, IRQ, Reset. |
Oops, It's 2008 already ?
I'm attaching a ZIP file with the rest of the layouts/schematics
for this project. They are partially untested, and there will be
no support. You have been warned.
So if you build them and they won't work, don't blame me.
From here on, you're on your own. Good luck and god speed...
(c) Dieter Mueller 2002,2003,2004
