Retrocomputing
Retro Gaming Convention
A short illustrated report about 2019 edition of the RGC, one of the best retro-gaming convention in France.
Apple II
Apple II ProDOS boot sequence
Humble beginnings Integer Basic When the Apple II became available in 1977, it came with no Disk Operating System. Indeed, it did not use Floppy discs as mass storage media, but audio tapes (then called “cassettes”), which are not well Read more…
Apple II
Rogue-like on Apple II: Raycasting a line of sight
In the previous post I discussed how to code an efficient tile engine running on Apple II computers that can be used to write a Rogue-like game. This engine is neat but, alas, the player can see the entire portion Read more…
Apple II
An HIRES tile engine for the Apple II
As I wrote in a previous post, programming a game engine in HIRES (”High Resolution”) is no small feat: its memory layout implies that contiguous lines on display are not contiguous in memory, there are some ”holes” in the memory Read more…
Retrocomputing
The 640K memory limit of MS-DOS
At the beginning of the 90’s, the PC platform was often mocked by its rivals. PCs of that era had become much more powerful than, say, an Amiga 500. But the Amiga offered a flat memory address, while a DOS Read more…