CPE/EE 422/522, Laboratory Assignment 3

Computer Display Interface -- Implementation Details

The following is the recommended interface connections to be made between the Altera UP 1 board, the external 16.3840 MHZ Oscillator, and the EGA monitor. Students who request help from the lab or course instructor must adhere to this wiring format Also if this format is followed then no buffering of the signals will be required.

EGA Standardized Connections

EGA Function	Wire Color	UP 1 EXPAN_A Connection	EGA Function	Wire Color	UP 1 EXPAN_A Connection
Ground	Brown	Ground Pin 2 or 4	Green	Yellow	Pin 17
Vertical Sync	Black	Pin 23	Green Intensity	Blue	Ground Pin 2 or 4
Horizontal Sync	White	Pin 21	Blue	Green	Pin 19
Red	Red	Pin 15	Blue Intensity	Purple	Ground Pin 2 or 4
Red Intensity	Orange	Ground Pin 2 or 4	Case Ground	Shielded	Ground Pin 2 or 4

You are to use an external 16.3840 MHZ TTL oscillator IC to provide the base timing signal. The output of this oscillator is to drive one of the Altera 10K20 pins (Pin 25) that are connected to the EXPAN_A connector in the manner shown below.