GS FLY

A 2.8 MHz Apple IIgs rotating real MaleCNS neurons, released for the machine's 40th anniversary. A 75,418-byte file holds 18 skeletons across 9 cell types, from the giant fiber DNp01 to a circadian clock neuron, each capped at 600 nodes by pruning the shortest terminal twigs first. The 65C816 spins them with 16-bit integer math and a 7-bit sine, depth-shaded through a 12-step ramp, while the screen mixes 320 and 640 pixel modes per scanline. With a CoGS card it opens a TLS session and streams the block down; the running benchmark projects how long all 166,700 neurons would take.

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#apple-iigs#65c816#retrocomputing#neuprint#skeletons#malecns