I am by no means any professional programmer, but I have coded 6502 since the late 80s and can safely say that I have a lot of experience. My main focus throughout all these years has been to reverse other …
Some rarely used 6502 aspects Read more »
(Seems my theme shows Code as black text on black background – will fix that eventually 😉 There are always aspects of c64 programming that you haven’t tested and exploring it is also a new learning. Assuming things that turn …
C64 Disk drive access Read more »
The VIC is the chip in a c64 that handle all graphics. Whereas the CPU sees all of the memory, the VIC only sees 1/4. We call that a VIC bank or graphics bank. Default is $0000 to $3fff – …
C64 graphics – a quick reference Read more »
So what is IFFL? IFFL is the technique to link disk data. Since the drive allocates a full sector as a minimum, the last sector is statistically only half full. So if you merge several files into a bigger one, …
The obsolescence of IFFL Read more »
Yes, yes, yes … One of the features I missed the most is not in VICE, as per one of the most recent builds (one of the last builds before 3.3 becomes 3.4). Logging to file. Quite often when I …
Being rather tech savvy but still not working with software, the entire field of source repos and management of them has been a field where I felt my competence was really blurry. Adding to this, I hear from many sources …
Building Vice emulator – NO black magic needed! Read more »
I have been involved in a few project where a PC keyboard was to be used for the c64. VICE emulator and Ultimate64 reimplementation on the c64. Let’s have a look at how the keyboard on a c64 works.. The …
VICE emulator is the leading tool for emulating the c64 on modern hardware. It works really fine, with the option of providing a near perfect emulation. For reversers like myself, the opportunity to be able to intercept the program with …
The VICE monitor – Pro level breaking Read more »
The Commodore c64 is a computer where the Kernal (the OS if you will) supports load and store on tape and disk. The tape is a directly connected device where the Kernal provides all the code to steer the units …
Commodore 64 disk drive programming Read more »
After discussions in a Facebook group I thought I’d write something more on copy protections on disk. The general starting point is the disk is a sheet of magnetic media put into a mechanism to read it. The mechanism has …