Category	Video
Video Types Supported	Monochrome, CGA, EGA
Video Processor	Juko
Highest Resolution Supported	640 x 400
Data Bus Type	8-bit ISA
Memory Type	DRAM
Maximum Onboard Memory	256KB (location unknown)

CONNECTIONS
Purpose	Location	Purpose	Location
9-pin video port	CN1	25-pin parallel port - internal	CN8
Composite video jack	CN2	25-pin serial port - internal	CN9
9-pin mouse port	CN3	25-pin serial port - internal	CN10
6-pin light pen connector	CN5	Control cable connector - floppy drive	CN11
16-pin game port	CN7

COMPOSITE COLOR DISPLAY CONFIGURATIONS
Function		Location	Setting
»	Composite color selected	J1	Pins 1 & 2 closed
»	Clock frequency is 14.31818 MHz	J3	Pins 1 & 2 closed
		J5/SW3	Pins 2 & 3 closed
	Composite color video mode selected	J5/SW4	Pins 2 & 3 closed
		J5/SW5	Pins 1 & 2 closed

COMPOSITE MONOCHROME DISPLAY CONFIGURATIONS
Function		Location	Setting
	Composite mono selected	J1	Pins 2 & 3 closed
»	Clock frequency is 14.31818 MHz	J3	Pins 1 & 2 closed
		J5/SW3	Pins 2 & 3 closed
	Composite mono video mode selected	J5/SW4	Pins 1 & 2 closed
		J5/SW5	Pins 2 & 3 closed

CGA DISPLAY CONFIGURATIONS
Function		Location	Setting
»	Clock frequency is 14.31818 MHz	J3	Pins 1 & 2 closed
»	Vertical synchronize pulse is positive	J5/SW1	Pins 1 & 2 closed
»	Horizontal synchronize pulse is positive	J5/SW2	Pins 1 & 2 closed
		J5/SW3	Pins 1 & 2 closed
»	CGA display mode selected	J5/SW4	Pins 2 & 3 closed
		J5/SW5	Pins 1 & 2 closed

MONOCHROME DISPLAY CONFIGURATIONS
Function		Location	Setting
	Clock frequency is 16MHz	J3	Pins 3 & 4 closed
	Vertical synchronize pulse is negative	J5/SW1	Pins 2 & 3 closed
»	Horizontal synchronize pulse is positive	J5/SW2	Pins 1 & 2 closed
		J5/SW3	Pins 1 & 2 closed
	Mono display mode selected	J5/SW4	Pins 1 & 2 closed
		J5/SW5	Pins 1 & 2 closed

640 X 400 COLOR DISPLAY CONFIGURATIONS
Function	Location	Setting
Clock frequency is 23.4MHz	J3	Pins 5 & 6 closed
Vertical synchronize pulse is negative	J5/SW1	Pins 2 & 3 closed
Horizontal synchronize pulse is negative	J5/SW2	Pins 2 & 3 closed
	J5/SW3	Pins 1 & 2 closed
640 x 400 display mode selected	J5/SW4	Pins 1 & 2 closed
	J5/SW5	Pins 2 & 3 closed

MOUSE PORT (CN3) INTERRUPT SELECTION
Setting		J2
»	IRQ2	Pins 1 & 2 closed
	IRQ3	Pins 3 & 4 closed
	IRQ4	Pins 5 & 6 closed
	IRQ5	Pins 7 & 8 closed

MOUSE PORT MODE
Setting		J6/SW1
»	Enabled	Pins 1 & 2 closed
	Disabled	Pins 2 & 3 closed

MOUSE PORT IRQ MATCHING
Setting		J6/SW2	J6/SW3	J6/SW4	J6/SW5
»	IRQ2	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed
	IRQ3	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed
	IRQ4	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed
	IRQ5	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed

PARALLEL PRINTER PORT (CN8) MODE
Setting		J4/SW1
»	enabled	Pins 1 & 2 closed
	Disabled	Pins 2 & 3 closed

GAME PORT (CN7) MODE
Setting		J4/SW2
»	Enabled	Pins 1 & 2 closed
	Disabled	Pins 2 & 3 closed

REALTIME CLOCK CONFIGURATIONS
Function		Location	Setting
»	Clock assigned as timer 1 (340-35F)	J7	Pins 1& 2 closed
	Clock assigned as timer 2 (240-25F)	J7	Pins 2 & 3 closed
»	Timer uses IRQ4	J10	Pins 1 & 2 closed
	Timer uses IRQ4	J10	Pins 3 & 4 closed
	Timer uses IRQ4	J10	Pins 5 & 6 closed
	Timer uses IRQ4	J10	Pins 7 & 8 closed

SERIAL PORT 2 (CN9) CONFIGURATION
ADDRESS/IRQ	J8	J9
2F8-2FF/IRQ4	Closed	Closed
Port disabled	Open	Open

SERIAL PORT 1 (CN10) CONFIGURATION
ADDRESS/IRQ	J11	J12
3F8-3FF/IRQ4	Closed	Closed
Port disabled	Open	Open