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# OMNICOMP GRAPHICS CORPORATION
M&M BASIC
Category Video
Video Types Supported VGA
Video Processor S2C9001
Highest Resolution Supported 720 x 480
Data Bus Type 16-bit ISA
Memory Type N/A
Maximum Onboard Memory N/A
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------------+----------+--------------+----------|
| Video input connector | CN1 | VESA feature | JP4 |
| | | connector | |
|-----------------------+----------+--------------+----------|
| Video output | CN2 | | |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O REGISTER SPACE CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP1 |
|----------------------------+-------------------------------|
| » | Fixed | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| | Programmed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
|Address|SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6|SW1/7|SW1/8|
|-------+------+------+------+------+------+-----+-----+-----|
| 100h | Off | On | On | On | On | On | On | On |
|-------+------+------+------+------+------+-----+-----+-----|
| 200h | On | Off | On | On | On | On | On | On |
|-------+------+------+------+------+------+-----+-----+-----|
| 300h | Off | Off | On | On | On | On | On | On |
|-------+------+------+------+------+------+-----+-----+-----|
| 400h | On | On | Off | On | On | On | On | On |
|-------+------+------+------+------+------+-----+-----+-----|
| 500h | Off | On | Off | On | On | On | On | On |
|-------+------+------+------+------+------+-----+-----+-----|
| FB00h | Off | Off | On | Off | Off | Off | Off | Off |
|-------+------+------+------+------+------+-----+-----+-----|
| FC00h | On | On | Off | Off | Off | Off | Off | Off |
|-------+------+------+------+------+------+-----+-----+-----|
| FD00h | Off | On | Off | Off | Off | Off | Off | Off |
|-------+------+------+------+------+------+-----+-----+-----|
| FE00h | On | Off | Off | Off | Off | Off | Off | Off |
|-------+------+------+------+------+------+-----+-----+-----|
| FF00h | Off | Off | Off | Off | Off | Off | Off | Off |
|------------------------------------------------------------|
| Note: A total of 255 base address settings are available. |
| The switches are a binary representation of the decimal |
| memory addresses. SW1/8 is the Most Significant Bit and |
| switch SW1/1 is the Least Significant Bit. The switches |
| have the following decimal values: SW1/8=32768, |
| SW1/7=16384, SW1/6=8192, SW1/5=4096, SW1/4=2048, |
| SW1/3=1024, SW1/2=512, SW1/1=256. Turn off the switches |
| and add the values of the switches that are off to obtain |
| the correct memory address. (Off=1, On=0) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO INPUT IMPEDANCE SELECTION |
|------------------------------------------------------------|
| Setting | SW4/2 | SW4/3 | SW4/4 |
|------------------------------------+-------+-------+-------|
| Red display signal from VGA card | Off | Off | Off |
|------------------------------------+-------+-------+-------|
| Green display signal from VGA card | Off | Off | Off |
|------------------------------------+-------+-------+-------|
| Blue display signal from VGA card | Off | Off | Off |
|------------------------------------+-------+-------+-------|
| Channel 1 composite video or Y of | Off | Off | Off |
| S-video | | | |
|------------------------------------+-------+-------+-------|
| Channel 2 composite video or Y of | Off | Off | Off |
| S-video | | | |
|------------------------------------+-------+-------+-------|
| Channel 3 composite video or Y of | Off | Off | Off |
| S-video | | | |
|------------------------------------+-------+-------+-------|
| Channel 1 C of S-video | Off | Off | On |
|------------------------------------+-------+-------+-------|
| Channel 2 C of S-video | Off | On | Off |
|------------------------------------+-------+-------+-------|
| Channel 3 C of S-video | On | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO INPUT IMPEDANCE SELECTION (CON’T) |
|------------------------------------------------------------|
| Setting | SW4/5 | SW4/6 | SW4/7 |
|------------------------------------+-------+-------+-------|
| Red display signal from VGA card | Off | Off | Off |
|------------------------------------+-------+-------+-------|
| Green display signal from VGA card | Off | Off | Off |
|------------------------------------+-------+-------+-------|
| Blue display signal from VGA card | Off | Off | Off |
|------------------------------------+-------+-------+-------|
| Channel 1 composite video or Y of | Off | Off | On |
| S-video | | | |
|------------------------------------+-------+-------+-------|
| Channel 2 composite video or Y of | Off | On | Off |
| S-video | | | |
|------------------------------------+-------+-------+-------|
| Channel 3 composite video or Y of | On | Off | Off |
| S-video | | | |
|------------------------------------+-------+-------+-------|
| Channel 1 C of S-video | Off | Off | Off |
|------------------------------------+-------+-------+-------|
| Channel 2 C of S-video | Off | Off | Off |
|------------------------------------+-------+-------+-------|
| Channel 3 C of S-video | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO INPUT IMPEDANCE SELECTION (CON’T) |
|------------------------------------------------------------|
| Setting | SW4/8 | SW4/9 | SW4/10 |
|-----------------------------------+-------+-------+--------|
| Red display signal from VGA card | Off | Off | On |
|-----------------------------------+-------+-------+--------|
| Green display signal from VGA | Off | On | Off |
| card | | | |
|-----------------------------------+-------+-------+--------|
| Blue display signal from VGA card | On | Off | Off |
|-----------------------------------+-------+-------+--------|
| Channel 1 composite video or Y of | Off | Off | Off |
| S-video | | | |
|-----------------------------------+-------+-------+--------|
| Channel 2 composite video or Y of | Off | Off | Off |
| S-video | | | |
|-----------------------------------+-------+-------+--------|
| Channel 3 composite video or Y of | Off | Off | Off |
| S-video | | | |
|-----------------------------------+-------+-------+--------|
| Channel 1 C of S-video | Off | Off | Off |
|-----------------------------------+-------+-------+--------|
| Channel 2 C of S-video | Off | Off | Off |
|-----------------------------------+-------+-------+--------|
| Channel 3 C of S-video | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTE |
|------------------------------------------------------------|
| SW2 is the Video Color Switch. It is used to adjust the |
| timing of the color information in the video signal. SW2 |
| consists of six switches the default is the SW2/4 switch |
| in the On position, & the rest of the switches in the Off |
| position. You must use a "trial and error" process to |
| adjust SW2. Only one switch can be On at any given time. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTE |
|------------------------------------------------------------|
| SW3 is the Color Key Skew Switch. It is used to adjust the |
| timing of the color key signal. SW3 consists of six |
| switches the default is the SW3/4 switch in the On |
| position, & the rest of the switches in the Off position. |
| You must use a "trial and error" process to adjust SW3. |
| Only one switch can be On at any given time. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FACTORY CONFIGURED - DO NOT ALTER |
|------------------------------------------------------------|
| Switch | Position |
|-----------------------------+------------------------------|
| SW4/1 | On |
+------------------------------------------------------------+