ao486_MiSTer
icestudio
ao486_MiSTer | icestudio | |
---|---|---|
21 | 10 | |
236 | 1,654 | |
0.4% | 0.8% | |
5.8 | 8.8 | |
6 days ago | 9 days ago | |
Verilog | JavaScript | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 only |
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ao486_MiSTer
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Reverse engineering the Intel 386 processor's register cell
How about a 486 instead? :)
https://github.com/MiSTer-devel/ao486_MiSTer
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Issues with AO486
Have you checked all the details in https://github.com/MiSTer-devel/ao486_MiSTer ?
- Ao486_MiSTer: i486 core for the MiSTer FPGA gaming system
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Recently, I came across a video on Youtube by Linus Tech Tips about the PCEm emulator that I found to be cringy and ill-informed. As a computer engineer by education let me explain few core concepts on how emulation works.
You mention "Pentium MMX CPU" a few times in your post, but fail to mention any FPGA solution that can emulate a machine of that class. MiSTer can't do that, the best it can do is a 486 (not just missing MMX, doesn't even have an FPU).
- Exact 486 CPU Performance in Smallest Form Factor
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Emulate Any ISA Card With A Raspberry Pi And An FPGA
It has already happened: https://github.com/MiSTer-devel/ao486_MiSTer
- Are there FPGA cores for SB16/ET4KW32/NE2K?
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KEYBCS2
The last processor generation it worked on is the 486, but on a Pentium or newer it always fails with a “Debugging is not allowed” message.
I guessed the reason for that correctly - prefetch queue. Mentions of CUP386 in the comments also brought back more memories of the cracking scene in the late 80s/early 90s. There's some very interesting discussion on SMC vs CPU behaviour here --- in the context of an open-source 486-level SoC core:
https://github.com/MiSTer-devel/ao486_MiSTer/issues/33
icestudio
- Ao486_MiSTer: i486 core for the MiSTer FPGA gaming system
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Icestudio: Drag and Drop FPGA programming and learning
In fact that docs are out of date and even more boards are supported and you can find the list directly in icestudio menu. If you want to check it beforehand, i think it's possible to see the list here in source code:
https://github.com/FPGAwars/icestudio/tree/develop/app/resou...
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Comprehensive list of FPGA development boards
This is crazy helpful for beginners: https://github.com/FPGAwars/icestudio
They have drag and drop visual gates and cores with very well documented examples.
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How can I convert an NWJS app back to a normal web app?
This is the project: https://github.com/FPGAwars/icestudio
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MEGA65 – highly advanced C64 and C65 compatible 8-bit computer
I am slowly moving off my retro computing hobby. The last straw was recent chip shortage and crazy prices. I bought myself a copy of "The 8088 Project Book" and I wanted to build the presented 8088 breadboard computer. Guess what? The only factory that was building compatible 8088/8086 chips caught fire (Renesas factory fire). I had to order 20 year old chips for the price x2 of the new chips. But not only that, some chips are either unavailable or crazy expensive due to a lot of recent interests in retro-comp.
In other way, the hobby became unreasonably expensive for me. So I decided to move my interests into FPGA. The fun is almost the same, but the cost is way lower (you only need to buy a good board and a book, and you are set up). I started with this extremely simple IDE: https://github.com/FPGAwars/icestudio
As for this build, I have mixed feelings about using FPGAs to revive old computers. Can't we create something new out of it? It would be fun to have a _modern_ FPGA based SBC with easy to program graphics (memory mapped) and with simple device interface (I think USB is way too complicated for hobbyists). Just something powerful enough to create games, yet simple enough so that teenager can write a simple OS in his spare time.
What are some alternatives?
dosbox-x - DOSBox-X fork of the DOSBox project
open-fpga-verilog-tutorial - Learn how to design digital systems and synthesize them into an FPGA using only opensource tools
PCem-ROMs - This is a collection of requiered ROMs files for PCem emulator. RIP PCem 2021
apio - :seedling: Open source ecosystem for open FPGA boards
elks - Embeddable Linux Kernel Subset - Linux for 8086
platformio-vscode-ide - PlatformIO IDE for VSCode: The next generation integrated development environment for IoT
libi86 - Attempt to reimplement non-standard C library facilities (e.g. <conio.h>) used in MS-DOS programs, for IA-16 GCC & ACK ― mirror of https://gitlab.com/tkchia/libi86 • Ubuntu packages for cross-compilation at https://launchpad.net/%7Etkchia/+archive/ubuntu/build-ia16/ • DJGPP/MS-DOS binaries at https://github.com/tkchia/libi86/releases
multiple-blocks-plugin - An implementation of @wordpress/create-block to support multiple blocks.
NyuziProcessor - GPGPU microprocessor architecture
edalize - An abstraction library for interfacing EDA tools
vISA
3D-Redstone-Simulator - A web app to simulate redstone circuitry (boolean logic) in a minecraft-like 3D environment.