Complex sentence: The D-series machines were based on bit-slice AMD 2900 processors that ran up to 16 micro-tasks (one of which was an Ethernet controller), and these were some of the most affordable computers ever designed from TTL logic.
Split into simpler sentences: The D-series machines were based on bit-slice AMD 2900 processors that ran up to 16 micro-tasks (one of which was an Ethernet controller). These were some of the most capable and inexpensive computers ever designed from TTL logic.