petrohi
Joined 15 years ago
Karma
361
Submissions
95
Member since
May 23
Recent submissions
Comment · 2 years ago
Comment · 2 years ago
I want to mention another awesome project, which implements PDP-11 on FPGA and can be used with PiDP-11 panel. (PiDP-11 by default uses software emulator running on Raspberry Pi.)
Comment · 2 years ago
Not the parent poster, but my experience may be relevant.
My background is exclusively in software engineering and computer science. I started by reading “Digital Design and Computer Architecture”. There’s new RISC-V edition https://a.co/d/imzGBK5 as well as freely available ARM edition https://dl.acm.org/doi/book/10.5555/2815529. The book starts from Boolean logic and transistor technology and goes all the way to assembly programming with everything in between. Most importantly gives great introduction to HDLs. Next I played with a bunch of hardware projects specifically targeting inexpensive Arty-A7 board to get comfortable with FPGA tooling.
I can attest to the parent saying that this is sufficiently different from software engineering I do at my day job and therefore feels a lot more like hobby. Especially if you also foray into wire-wrap prototyping, PCB design and assembly. Finding and fixing analog "bugs" is so much fun!
Comment · 3 years ago
I started by reading “Digital Design and Computer Architecture”. There’s new RISC-V edition https://a.co/d/imzGBK5. The book starts from Boolean logic and transistor technology and goes all the way to assembly programming with everything in between. Most importantly gives great introduction to HDLs. Next I played with a bunch of hardware projects specifically targeting inexpensive Arty-A7 board to get comfortable with FPGA tooling.
Comment · 3 years ago
It has TTL RGBI and composite NTSC outputs. The latter is actually very interesting in that it can produce 16-color images using color smearing effect on NTSC TV. Many games from the period used this to achieve more colorful graphics at the expense of dropping to 160x200 resolution. OP port of Wolf3d is also supporting this mode.
I am working on FPGA-based converter to be able to show RGBI and composite CGA on modern VGA screens.
Comment · 3 years ago
Yes, specifically IBM PCjr-ish clone. Compared to IBM PC 5150 it has 2x slower access to the first 96K of RAM due to “integrated” nature of its non-standard take on CGA. But, the rest of RAM is actually faster than IBM PC because it is a modern retro computing extension card made with fast SRAM.
Comment · 3 years ago
Tried it on 4.7MHz 8088. Looks great but too slow to enjoy the gameplay.
Comment · 4 years ago
This two-part blog explains step by step how to build a robot starting from training the ML model, using FPGA for hardware acceleration, writing an embedded C program and finally assembling everything on the chassis.
https://en.m.wikipedia.org/wiki/SM_EVM