(TXT) View Source
# 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)
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| 9-pin video port | CN1 | 25-pin parallel | CN8 |
| | | port - internal | |
|-------------------+----------+------------------+----------|
| Composite video | CN2 | 25-pin serial | CN9 |
| jack | | port - internal | |
|-------------------+----------+------------------+----------|
| 9-pin mouse port | CN3 | 25-pin serial | CN10 |
| | | port - 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 | J3 | Pins 1 & 2 |
| | MHz | | 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 | J3 | Pins 1 & 2 |
| | MHz | | 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 | J3 | Pins 1 & 2 |
| | MHz | | closed |
|---+--------------------------------+----------+------------|
| » | Vertical synchronize pulse is | J5/SW1 | Pins 1 & 2 |
| | positive | | closed |
|---+--------------------------------+----------+------------|
| » | Horizontal synchronize pulse | J5/SW2 | Pins 1 & 2 |
| | is 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 | J5/SW2 | Pins 1 & 2 |
| | is 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 & | Pins 2 & |
| | | closed | closed | 3 closed | 3 closed |
|---+------+------------+------------+-----------+-----------|
| | IRQ3 | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & | Pins 2 & |
| | | closed | closed | 3 closed | 3 closed |
|---+------+------------+------------+-----------+-----------|
| | IRQ4 | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & | Pins 2 & |
| | | closed | closed | 2 closed | 3 closed |
|---+------+------------+------------+-----------+-----------|
| | IRQ5 | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & | Pins 1 & |
| | | closed | closed | 3 closed | 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 | 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 |
+------------------------------------------------------------+