Writing an old game for an old computer

Everything todo with programming goes HERE.
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Galaxip
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Writing an old game for an old computer

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Im in the process of writing a clone of universals 1981 arcade game ladybug for the acorn bbc microcomputer
the original arcade game had a Z80 cpu running at 4MHz with 24K of game program in eprom
fast hardware sprites with an extra 16K of eprom dedicated to sprites and game graphics

the bbc computer has a 6502 cpu running at 2MHz
has 32K of ram. 14K used for the bit-mapped screen, 18K remaining for game logic, graphics, sound and music
only 8 colors black, red, green, yellow, blue, magenta, cyan, white are available
no hardware sprites, all graphics must be rendered in software
very basic square wave sound chip

squeezing everything into 18K of space with a slower cpu and software rendering is a great challenge

original arcade game ==> https://www.youtube.com/watch?v=VCkaTDg36nw

the progress so far ==> https://stardot.org.uk/forums/viewtopic ... 53&t=21812
its all just test code right now, writing and testing the functions required for the final game
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Galaxip
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Re: Writing an old game for an old computer

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had a go at drawing and redrawing some enmy bugs, 1 set done and 7 more to go
https://www.youtube.com/watch?v=9oGO_GzVFj8
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Galaxip
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Re: Writing an old game for an old computer

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