The processors on the CM-1 were indeed bit-serial, with 16 of these per processor chip. On the CM-2, pairs of 16-processor chips were lashed up with a Weitek F

The processors on the CM-1 were indeed bit-serial, with 16 of these per processor chip. On the CM-2, pairs of 16-processor chips were lashed up with a Weitek FPU and glue circuitry for floating point computation. For the CM-5, processor nodes were Sparc chips with custom vector processors.