JUKO LABORATORIES, LTD.
G7-B
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 |