Some Assembly Required
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This is the original 1978 source code of Microsoft BASIC for 6502 with all original comments, documentation and easter eggs: M6502.MAC (1978-07-27, 6955 lines, 161,685 bytes) This is currently the oldest publicly available piece of source written by Bill Gates.
Super Mario 64 becomes a living diorama on Apple Vision Pro. Each level sits on your real table, and you walk around it while you play with a game controller. You are the camera: lean in for a closer look, or step around the table to see Mario from any side.
The Hypervisor.framework user mode virtualization API introduced in Mac OS X 10.10 (Yosemite) cannot only be used for toy projects like the hvdos DOS Emulator, but is full-featured enough to support a full virtualization solution that can for example run Linux.
Apple’s ill-fated Copland operating system is notoriously hard to run on real hardware, and has not previously been available in emulation. Here is the last build, D11E4 from June 1996, in an improved DingusPPC.
Since Version 10.10 (Yosemite), OS X contains Hypervisor.framework, which provides a thin user mode abstraction of the Intel VT features. It enables apps to use virtualization without the need of a kernel extension (KEXT) – which makes them compatible with the OS X App Store guidelines.
The original NMOS version of the MOS 6502, used in computers like the Commodore 64, the Apple II and the Nintendo Entertainment System (NES), is well-known for its illegal opcodes: Out of 256 possible opcodes, 151 are defined by the architecture, but many of the remaining 105 undefined opcodes do…
The HP C2089A “PostScript Cartridge Plus”, a 1991 add-on for the LaserJet II/III, adds PostScript Level 2 support through Adobe’s own reference interpreter (version 2010.118) on a 2 MB ROM. Thirty-five years on, that ROM is still a current PostScript implementation: it renders the language correc…
My first computer was a Texas Instruments TI-99/4A. Longtime readers may remember a previous article where we implemented TI-99/4A BASIC as a Scripting Language for modern computers. Recently I got nostalgic for the actual hardware so I got my 99 out of the closet where it had been for a decade o…
Update 2022: Web MiniDisc Pro can access NetMD devices through the browser and can also download protected files! If you have music on a collection of MiniDisc media and want to finally copy the data off onto modern media (or the cloud!), here are simple instructions for some different solutions:
If you type “WAIT6502,1″ into a Commodore PET with BASIC V2 (1979), it will show the string “MICROSOFT!” at the top left corner of the screen. Legend has it Bill Gates himself inserted this easter egg “after he had had an argument with Commodore founder Jack Tramiel”, “just in case Commodore ever…
G64 files are C64/1541 disk images that contain all bits as they are physically laid out on the 5¼-inch floppy disk. Let’s visualize them! This animation shows 28 regular Commodore 1541 disks. Track 1 contains 21 sectors. Every sector is prefixed by two small red areas: These are the SYNC marks.…
Tomu is a super cheap Open Source Hardware 24 MHz ARM computer with 8 KB of RAM and 64 KB of ROM that fits into your USB connector! Of course I had to put Commodore 64 BASIC on it, which can be accessed through the USB-Serial port exposed by the device.
Nobody doubts that the C64 was the greatest selling single computer model of all time, it even made it into the Guinness Book of World Records, but nobody quite knows how many it really was: Most sources say 17 million, others say 22 or even 30 million. With a high degree of confidence, I can now…
The physical data format on a Commodore 1541 5¼-inch floppy disk as used by the C64 is completely defined in software. The drive’s operating system fits 170 KB on a disk. This article explores different strategies, each with its pros and cons, to fit up to 246 KB.
Many reverse-engineered versions of “KERNAL”, the C64’s ROM operating system exist, and some of them even in a form that can be built into the original binary. But how about building the original C64 KERNAL source with the original tools?
25 years after the introduction of the 32 bit Intel i386 CPU, all Intel compatibles still start up (and wake up!) in 16 bit stone-age mode, and they have to be switched into 32/64 bit mode to be usable.
In the first Terminator movie, the audience sees the world from the T-800’s view several times. It is well-known that in two instances, there is 6502 assembly code on the T-800’s HUD, and many sites have analyzed the contents: It’s Apple-II code taken from Nibble Magazine. Here are HD versions of…