simple 8086-based microcomputer

basic 8086 system timing

detailed SDK-86 board

SDK-86 complete schematics

address decoders

interrupts

8254

8259A

8255A

	parallel data transfer
	internal block diagram of 8255A programmable parallel port
	8255A operating modes
	8255A control word formats
	8255A control word examples
	8255A port C bits
	interfacing a microprocessor to a tape reader and lathe
	8255 handshake waveforms
	speech synthesizer using 8255A
	8255A control words for speech synthesizer interface

8279

8237 and 8272A

8272A

8251A

RS-232C

memory

including controllers

minimal 8086 system

displaying contents of CX register

IBM PC motherboard

credits