8086 working mode and bus operation

1. Minimal mode system

(1) Structure

① Data bus buffer 74LS244 and 74LS245

② Latch 74LS373

③ Clock generator 8284A

(2) Working process

2. Maximum mode system

(1) Structure

① Bus ​​controller 8288

(2) Working process

3. Bus operation

(1) Read bus cycle in minimum mode

(2) Write bus cycle in minimum mode

(3) Read/write bus cycle in maximum mode