Viewing profile — petrohi

I remember using Soviet-made VAX clone from СМ ЭВМ series: https://en.m.wikipedia.org/wiki/SM_EVM

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.) …

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 Comput…

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 an…

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 t…

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 r…

Tried it on 4.7MHz 8088. Looks great but too slow to enjoy the gameplay.

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 a…

We work on an open source tensor processing unit at https://tensil.ai . It is not RISC-V based since only a handful of very simple instructions is needed for expressing data flows …

Something like the Alveo PCIe card has onboard HBM/DDR4 memory large enough for Tensil DRAM pools, so this would be similar to how GPU operates but could also reach to host memory …

Great questions! With Tensil, all computations are performed on the FPGA. In addition to matrix multiplication Tensil supports SIMD instruction with various operations. The ML acti…

It’s possible to form monochrome VGA signal with an SPI, which is commonly available in microcontrollers. I did little write-up on how to do it efficiently (DMA etc) on PIC32: http…

Very glad to see Rust on PIC32! This microcontroller is one of the very few that is still made in DIP package making it ideal for breadboardind and easy through-hole soldering, and…

Hello HN. SIDfi is a single-board self-contained SID file player. SIDfi requires the original MOS 6581 chip or a pin-compatible replacement such as ARMSID. SIDfi plays tune files s…