Z80 Digital Clock

Description:

Built out of a Z80 microcomputer system of my own design, this clock can display Hours, Minutes, and Seconds and does so using an interupt from an Intel 82C53 Counter/Timer chip that is equally as vintage as the Z80.

To Do:

• Clock Display
• Clock Display PCB
• Reset Circuit
• Basic Functionality (ROM and CPU)
• 8255 Peripheral Chip
• 8253 Counter/Timer
• Write Display Sub Routine
• Clock Sub Routine
• Buttons to Set time
• Sub routine for button input
• Z80 Clock PCB

Images:

Z80 Clock Schematic (New Version)

Z80 Clock Schematic (Old Version)

7 Segment Peripheral Schematic

7 Segment Peripheral Board Design

7 Segment PCB and Z80 Clock

7 Segments in the Dark