The Commodore VICMODEM (Model 1600)
The Commodore 1600, also known as the “VICMODEM”, is Commodore’s very first modem (1982): It supports 300 baud duplex connections, and is connected to an existing telephone’s handset connector instead of the phone line. This kept the price down, but required the user to dial manually through the phone.
The Commodore Modem/1200 (Model 1670)
The Commodore 1670, also known as the “Modem/1200”, is Commodore’s first Hayes-compatible modem: It connects directly to the phone line and supports pulse and tone dialing for 1200 and 300 baud duplex connections. There were two revisions, the original 1670 and the “new” 1670, a.k.a. CR-1670. (The unit in this article is the later revision.)
The Commodore Modem/300 (Model 1660)
The Commodore 1660, also known as the “Modem/300”, is Commodore’s first full-featured modem: It connects directly to the phone line and supports pulse and tone dialing for 300 baud duplex connections.
Commodore 264 Series Preliminary Users Manual [PDF]
This is the previously unpublished “Commodore 264 Series Preliminary Users Manual”, a prerelease version of the manual of what came to be the Commodore Plus/4.
Third Party Disk Drives for the C64: The "Technica"
I have previously analyzed the ROM images of some third party disk drives for the Commodore 64: The result was that most of them were just using the original binaries with some obfuscation, and some with some added features. This time, let’s look at another drive, the “Technica”, which is a little special in this regard.
Das Maschinensprache-Buch zum Commodore 64 [PDF]
Making of the Book "Anatomy of the 4040 Disk Drive"
To my surprise, Hilaire Gagne, the author of “Anatomy of the 4040 Disk Drive”, commented on my blog post about the reconstruction of his book.
Book "Anatomy of the 4040 Disk Drive" by Hilaire Gagne
Hilaire Gagne: Anatomy of the 4040 Disk Drive
(HTML, 632K)
Das neue Commodore 64 Intern Buch [PDF]
INPUT 64 Magazine Complete Archive
The complete archive of the German Commodore 64 magazine INPUT 64 (PDF, tapes, disks) is now available here.
C64-Artikel in der c't Retro 2018
This post is about articles I wrote for the c’t magazine in German language. The post is therefore in German.
Emulating the Intel 8080 on a MOS 6502
Rhapsody Developer's Guide [PDF, 1997]
Feiler, Jesse.
Rhapsody Developer’s Guide.
Boston: AP Professional, 1997.
ISBN 0-12-251334-7
(528 pages, 13.3 MB PDF)
Inside Commodore DOS [PDF]
Commodore 128 Programmer's Reference Guide (PDF)
Commodore Plus/4, C116, C16 (TED) Technical Documents
The Commodore Plus/4, the C16 and the C116 from 1984 were members of the 6502-based “TED” series, named after the 7360 TED (“Text Editing Device”) video controller. The TED systems were basically the low-cost cousins of the C64: The overall system architecture and the video chip are very similar to the C64’s, but they lack certain features like hardware sprites. On the other hand, there are some added features like extra colors and more control over the internal timing of the video chip.
HFS+ File System Analysis and Forensics with fileXray
Modern filesystems are highly optimized database systems that are a core function of modern operating systems. They allow concurrent access by many CPUs, they keep locality up and fragementation down, and they can recover from crashes guaranteeing consistent data structures.
Amiga intern (PDF)
(German) Die Qualität dieses Scans ist furchtbar, aber wenigstens ist die PDF durchsuchbar.
Apple Copland Reference Documentation
The Copland project was Apple’s ill-fated attempt in the mid 1990s to replace the aging classic Mac OS with a more modern operating system that had a microkernel, virtual memory and preemptive multitasking. Information on Copland is scarce, therefore I have compiled 20 hard to find Copland reference documents, as well as the 359 page book “Mac OS 8 Revealed”.
Apple Lisa Operating System Reference Manual (PDF, 1983)
The Apple Lisa from 1983 was the first consumer-class computer with a graphical user interface and significantly more advanced than the 1984 Macintosh, which had a similar UI, but a comparatively primitive underlying OS. Here, I present a searchable PDF of the rare “Operating System Reference Manual for the Lisa” (1983), as well as a quick overview of the OS and how it compares to UNIX.