JUKO LABORATORIES, LTD. G7-B Category Video Video Types Supported Monochrome, CGA, EGA Video Processor Juko Highest Resolution 640 x 400 Supported Data Bus Type 8-bit ISA Memory Type DRAM Maximum Onboard Memory 256KB (location unknown) [Image] CONNECTIONS Purpose Location Purpose Location 9-pin video port CN1 25-pin parallel port CN8 - internal Composite video jack CN2 25-pin serial port - CN9 internal 9-pin mouse port CN3 25-pin serial port - CN10 internal 6-pin light pen CN5 Control cable CN11 connector connector - floppy drive 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 J5/SW4 Pins 2 & 3 selected 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 J5/SW4 Pins 1 & 2 selected 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 J5/SW1 Pins 1 & 2 positive closed » Horizontal synchronize pulse is J5/SW2 Pins 1 & 2 positive 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 J5/SW1 Pins 2 & 3 negative closed » Horizontal synchronize pulse is J5/SW2 Pins 1 & 2 positive 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 J5/SW1 Pins 2 & 3 negative closed Horizontal synchronize pulse is J5/SW2 Pins 2 & 3 negative 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 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed IRQ3 Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 Pins 2 & 3 closed closed closed closed IRQ4 Pins 2 & 3 Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 closed closed closed closed IRQ5 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 Pins 1 & 2 closed closed closed 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 J7 Pins 1& 2 (340-35F) closed Clock assigned as timer 2 J7 Pins 2 & 3 (240-25F) 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