Electronics

CPU block diagram, theory of operation, time diagrams and schematics are found in this section.

Theory of Operation

CPU Block Diagram

Registers implementation

Flags implementation

Memory implementation

Memory Read Cylcle

Memory Write Cycle

Arithmetic Logic Unit (ALU)

Synchronization

Master Controller

Master Clock oscilator

Encoded Time signals (ET0, ET1, ET2)

Arbiter and Master Status signals (S0, S1)

Instruction Fetch Cycle

Instruction Exec Cycle

Example of a sequence built with combinational logic

Fail Conditions

Invalid Instruction Code

WAIT time out

Fail Trap

List of Internal Control Signals

Timing Diagrams

Schematics