The Unit Control

The Unit Control

1. Micro Operations

   • The fetch cycle
     • MAR
     • MBR
     • IR
     • PC
   • The indirect cycle
   • The interrump cycle
   • The excecute cycle
   • The instruction cycle

2. Control of the processor

   • Funtional requirements
   • Control signals
     • Clock
     • Instruction register
     • Flags
     • Control signals from control bus

3. Hardwired implementation

   • Control Unit Imputs
   • Control Unit Outputs

4. The Intel 8085

   • ncrementer/decrementer address latch
   • Interrump control
   • Serial IO control