How the Final Cartridge III Freezer works
by Daniël Mantione
6502 Illegal Opcodes in the Siemens PC 100 Assembly Manual (1980)
The 6502’s “illegal” opcodes were of intense interest to home computer enthusiasts, and analyses were published in various magazines. But one would have never expected a company like Siemens to document illegal opcodes in a programming manual from 1980.
Siemens Personal Computer PC 100 Bedienungsanleitung, Ausgabe 1981/1982
The Siemens PC 100 was a version of the 6502-based “AIM-65” SBC in a case and with slightly modified ROMs. Siemens offered a set of German-language manuals, which included translated Assembler (MOS Resident Assembler) and BASIC (Microsoft BASIC) manuals, but also a general manual (“Bedienungsanleitung”).
64'er Magazin – mit 40 Jahren Verzögerung jetzt monatlich im Web
Zum 40jährigen Jubiläum des 64’er Magazins präsentieren wir das Kunstprojekt www.64er-magazin.de: eine Website, die so tut, als wäre 1984. Exakt 40 Jahre nach der ursprünglichen Veröffentlichung erscheint hier jeden Monat eine neue Ausgabe:
Silo S01E06: 38911 BYTES FREE
CCGMS Future 0.2
CCGMS Future 0.2 was just released. It adds 80 columns support, a true ASCII charset (in 80c mode), and bug fixes.
The Punter C1 Protocol
The Punter file transfer protocol (“New Punter”/“Punter C1”) is an alternative to the XMODEM family of protocols, which was and still is very popular on BBSes for Commodore computers. It is notorious for being badly documented. Let’s fix that.
Announcing CCGMS Future 0.1
The CCGMS Terminal Program for the Commodore 64 is maintained again, and there is a new version: CCGMS Future 0.1, with bug fixes and new features.
The Ultimate Commodore 1541 Disk Drive Talk [video]
This is the video recording of “The Ultimate Commodore 1541 Disk Drive Talk” at VCF West 2021. As always, if you think it’s too fast, try watching it at 0.75x speed!
[Announcement] The Ultimate Commodore 1541 Disk Drive Talk @ VCFW 2021
After
Commodore's Assemblers: Part 5: 6502ASM
In the series about the assemblers Commodore used for developing the ROMs of their 8-bit computers, this article covers the 1989 “Commodore 6502 Assembler” (6502ASM), a cross-assembler written in C that ran on VAX and PC.
Commodore's Assemblers: Part 4: HCD65
In the series about the assemblers Commodore used for developing the ROMs of their 8-bit computers, this article covers the 1987 “HCD65” assembler that ran on the C128.
Commodore's Assemblers: Part 3: BSO CY6502
In the series about the assemblers Commodore used for developing the ROMs of their 8-bit computers, this article covers the 1984 “Boston Systems Office” (BSO) cross-assembler running on VAX/VMS.
Commodore's Assemblers: Part 2: MOS Resident Assembler
In the series about the assemblers Commodore used for developing the ROMs of their 8-bit computers, this article covers the 1976 “MOS Resident Assembler” that ran on a variety of 6502-based computers.
Commodore's Assemblers: Part 1: MOS Cross-Assembler
In the series about the assemblers Commodore used for developing the ROMs of their 8-bit computers, this article covers the 1975 “MOS Cross-Assembler”, which was available for various mainfraimes of the era.
Commodore's Assemblers: Overview
Commodore used 5 different assemblers, most of them in-house tools, to build the ROMs for their Computers like the PET, the C64 and the C128. Nevertheless, all Commodore source files, from 1975 to 1990, share a common format and use the same assembly directives. This series of articles describes each of these assemblers.
Reverse-Engineered geoWrite 2.1 for C64 Source Code
geoWrite is a WYSIWYG rich text editor for the Commodore 64 GEOS operating system. I created a reverse-engineered source version of the geoWrite 2.1 for the C64 (English and German) for the cc65 compiler suite:
Ankündigung: Vortrag "Diskettenlaufwerke am Beispiel der Commodore 1541" am VCFB 2020
This post is about an upcoming talk in German.
Inside geoWrite – 9: Keyboard Handling
In the series about the internals of the geoWrite WYSIWYG text editor for the C64, this article discusses how the app consolidates keyboard input to keep up with fast typists.