Memory System - Hierarchy
Direct Memory
The CPU largely waits on main memory or external bus timing.
CPU Exemplars With This Coordinate
ARCHITECTURAL_ESTIMATE
Intel 4004
1971 - intel
A 4-bit microprocessor showing the CPU as a new integrated control object: narrow datapath, small state, external memory, and board-level system role.
ARCHITECTURAL_ESTIMATEARM7TDMI
1994 - arm
A compact RISC core where clean ISA structure, scalar pipeline, and low-power embedded use define the technology more than peak throughput.