F4HDK

6 ms·

1.
by F4HDK 7y ago
I'm F4HDK, the creator of these NPR modem. The unprotected telnet access is only for local management, especially when you connect only 1 PC to one NPR Client modem. If you need security for accessing configuration/management fea
2.
by F4HDK 8y ago
I still use wire-wrapping with veroboards quite often for my home hobby. I like this method, because above certain frequency, it is fairly difficult (quite impossible) to use Breadboards because of electromagnetic issues. The goal is to tes
3.
by F4HDK 8y ago
Yes, the "finished" status of A2Z is what I am the most proud of. Lots of "CPU on FPGA" projects only deal with the CPU itself, and will never become a fully "usable" computer. I managed to work on the 3 main t
4.
by F4HDK 8y ago
Maybe I have not understood in details what you mean... but my A2Z CPU has no internal (hardware) stack pointer, unlike the 8051. The only available addressing mode is "direct addressing". Of course, you can emulate indirect addre
5.
by F4HDK 8y ago
I started this project with only standard electronic knowledges. I had no experience of FPGAs, of writing compiler and assemblers. I learned these topics as an autodidact. It is a "learning by doing" project. And of course, I have
6.
by F4HDK 8y ago
Thank you very much for this encouraging comment! I ended my studies 15 years ago, I made this project as an "autodidact". I don't know if I will work again on such projects, because I have tons of other electronic topics I
7.
by F4HDK 8y ago
Why do you compare my A2Z project with RISC-V? Have you read the pages and the blog posts on hackaday? Have you understood what A2Z is? A2Z is (only) a DIDACTIC project. The goal is learning by doing , and therefore the goal is to reinvent
8.
by F4HDK 8y ago
You are right, but my A2Z is not like old cars or vintage computer. It's more like designing and building from only few existing parts a karting, or a small buggie, without refering to existing drawings. A very simple machine, not very
9.
by F4HDK 8y ago
It really depends on you current skills. If you already know about electronics, and roughly what an FPGA is, and if you know C programming, then you can jump rapidly to FPGA and Verilog. One good and very condensed training course below:
10.
by F4HDK 8y ago
You are 100% right. This project fits 100% with my personality. I like to understand in details what I'm working on, even if I need to "loose" time exploring things not directly linked to what I'm supposed to do. And I a
11.
by F4HDK 8y ago
I am an autodidact for all these things (FPGA, compiler). This is my first FPGA-Verilog project and my first compiler project. I have learned these things specifically for this project. It took me 2 years to complete this project, during e
12.
by F4HDK 8y ago
The source code is compatible with Altera Quartus II. You can also execute the A2Z emulator on your PC, without the Altera suite.
13.
A2Z: A computer designed and built from scratch. Custom CPU on FPGA (2017)(hackaday.io)
262 points by F4HDK 8y ago|50 comments