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Parallax Propeller 1 (P8X32A)

The Parallax Propeller 1 (P8X32A) is a distinctive multicore microcontroller introduced in 2006: eight identical 32-bit processors (cogs), each with 512 longs of private RAM, share a common 32KB hub RAM through a round-robin hub and a set of 32 I/O pins. Every instruction is conditionally executed and carries the ZCRI effect flags, and the chip has no interrupts (a spare cog waits on an event instead). Here it runs real hand-assembled PASM on a from-scratch eight-cog core, disassembled with a new Propeller decoder.