Lesson Archives

  1. Interrupts vs. Polling, Types of 8086 Interrupts, NMI, INTR, INTA, Vector Table, INT 0, Interrupt Sub-Routine (ISR), Processing of an Interrupt by the 8086, Soft Interrupts, Bus Cycle, Instruction Cycle, Machine Cycle, T States
  2. 8086 Adress Decoding and Bus De-Multiplexing, Latch IC 74LS373, 74373 Deocer, Memory / IO Chip Select Logic, Bi-directional buffer 74245, 74LS245 Bi-Directional Buffer, Bus-Buffering, Demultiplexing the Buses, Clock Generator (8284A), Timing Diagram, Memory Write Operation, Memory Read Operation, Memory Access Time, TCLAV- Time from Clock to Address Valid, TCLRL- Time from Clock to Read Line, […]
  3. 8086 Explanation of Pin  Diagram, Pins and Signals, Common signals, address bus, Bus High Enable/Status, High order address bus, MINIMUM / MAXIMUM. RD (Read) (Active Low), TEST, READY, Min/ Max Pins, minimum mode of operation, HOLD, HLDA (Hold Acknowledge) Status signals, Queue Status, Bus Request/ Bus Grant.
  4. LOOP, Conditional LOOPs, LOOPE, LOOPZ, LOOPNE , LOOPNZ, PROCEDURES, Near Call, Far Call, CALLs with Register Operands, CALLs with Indirect Memory Addresses, RET, near return, far return, Example of a Procedure, MACROS, CMC Complement carry flag (NOT carry flag content), CLC Clear carry flag, STC Set carry flag, CLI Clear the Interrupt, STI Set the […]