by Manos Pitsidianakis on 2025-08-25 I was able to write a simple just-in-time compiled emulator for the aarch64 ISA (Arm A-profile A64 Instruction Set Architecture). The Armv8-A/Armv9-A specs are massive in size, so the initial scope is for basic functionality … Read more
Start of the journey We started our journey with iOS emulation by looking at existing open-source solutions. We had successfully run alephsecurity/xnu-qemu-arm64 before, but the project being read-only was concerning. Then we tried TrungNguyen1909/qemu-t8030 and it had quite a few … Read more
This is the first post in a series on emulating the main Sega Genesis sound chip, the Yamaha YM2612 FM synthesis chip, also known as the OPN2. To date, the YM2612 is pretty easily the most difficult-to-emulate sound chip that … Read more
2024-12-31 Emulating the FMAdd Instruction, Part 1: 32-bit Floats A thing that I had to do at work is write an emulation of the FMAdd (fused multiply-add) instruction for hardware where it wasn’t natively supported (specifically I was writing a … Read more
I have been working on an emulator for early (Motorola 68000-powered) Macintosh computers. While implementing the disk drive, I noticed documentation was scattered and hard to find. Now that I have a working implementation, this post is my attempt to … Read more
Published Thursday, December 13 2018 Back in the early 1980s, before GUIs were commonplace, Rob Pike and Bart Locanthi Jr. at AT&T Bell Labs created a bitmapped windowing system for use with UNIX. Originally, they called the system “jerq”, a … Read more
You might know [Evan Martin] as the developer of retrowin32. It’s a Windows and x86 emulator designed to run on a Mac or on the web. He’s recently been exploring how to run 32-bit x86 binaries on the AArch64 (aka … Read more
August 23, 2023 retrowin32, my Windows emulator can be viewed as a combination of an x86 emulator and a Windows emulator. Both of these halves are necessary to run it on the web and machines that don’t have an x86 … Read more
January 21, 2023 The most common question about retrowin32, my Windows emulator — after “why even do this?” — is about how it actually works. This is the kind of thing that now feels obvious to me but which was … Read more
It’s Wednesday and i feel like doing something fun. How about playing with an emulator? Blink is a new CPU emulator written in C, made by Justine Tunney. Besides having a really cool name, blink has a lot of impressive … Read more