Motorola 88100

The separate MC88200 integrated circuit optionally add level 1 cache and a paged memory management unit.

An MC88100 system typically used two of these devices for instructions and data; additional MC88200s could be added to increase the size of the caches.

This partitioned scheme was chosen to provide system flexibility, the amount of cache could be varied depending on the price point.

In practice, these additional chips required more space on the circuit board and the buses between the MC88200s and MC88100 added complexity and cost.

As the 68000 division viewed the 88000 as a competitor, they forced the MC88100 to be priced unacceptably high for a volume part.