"Motorola Redesigns 6800"(PDF). Microcomputer Digest. 3 (2). Santa Clara, CA: Microcomputer Associates: 4. August 1976. "Motorola is redesigning the M6800 microprocessor family by adding depletion loads to increase speed and reduce the 6800 CPU size to 160 mils."
Pseudo nMOS means that an enhancement-mode p-channel transistor with grounded gate is used in place of the depletion-mode n-channel transistor. See http://eia.udg.es/~forest/VLSI/lect.10.pdf