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x86 | ||
autumn.s | ||
empty.dsk | ||
hello.bas | ||
Makefile | ||
README | ||
seasons.dsk | ||
seasons.s |
Apple II Seasons 128B Demo -=DESiRE=- / Outline 2020 Watch as leaves cycle through the colors of the seasons Platform: Apple II Requires Apple II+ (1979) or later Code: deater hellmood qkumba Link to video: http://web.eece.maine.edu/~vweaver/junk/appleii_seasons.mkv Video captured on AppleWin emulator. Should run on real hardware but all of my Apple II hardware is on lockdown at work. Files: SEASONS -- 127 byte executable seasons.s -- source code, can assemble with ca65 assembler seasons.dsk -- 140k Apple DOS33 disk image suitable for use in emulator Notes: + 128 Byte demo for the Apple II (1MHz 6502) + Written in 6502 assembly language + Uses "high-resolution" graphics mode which is 280x192 in 6 colors. This mode has lots of complex color-clash and memory-interleave issues which make it a pain to code for. + The Apple II has very simple graphics. No hardware sprites, no VBLANK/HBLANK interrupts, no scrolling, no palette changes, no acceleration of any type. The only feature it has is two graphics pages for page flipping (which is not used in this demo) + Depends on the Applesoft BASIC ROM for "HPLOT" routine which means it requires at least an Apple II+ (released in 1979) or later machine. Should work on a II+/IIe/IIc/IIgs, and even an original Apple II (1977) if you have an Applesoft language card ROM expansion + Based on Hellmood's 64B DOS demo "Autumn" + Saves a few bytes by running entirely in the zero page