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# UNIDENTIFIED
TOP SEGA 800
Category Video card
Video Type EGA/Monochrome
Video Processor Unidentified
Highest Resolution Supported 800 x 600
Data Bus Type 8-bit ISA
Memory Type DRAM
Maximum Onboard Memory 64KB (Location unknown)
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+----------+-----------------+----------|
| Feature connector | J1 | RCA jack 2 | J4 |
|--------------------+----------+-----------------+----------|
| Light pen | J2 | 9-pin analog | J5 |
| connector | | video port | |
|--------------------+----------+-----------------+----------|
| RCA jack 1 | J3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O PORT ADDRESS CONFIGURATION |
|------------------------------------------------------------|
| Port | JMP1 |
|----------------------------+-------------------------------|
| » | 3xxh | Pins 2 & 3 closed |
|----+-----------------------+-------------------------------|
| | 2xxh | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR TYPE SELECT |
|------------------------------------------------------------|
| Type | JMP2 |
|----------------------------+-------------------------------|
| » | EGA | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| | Other | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS TYPE SELECT |
|------------------------------------------------------------|
| Type | JMP3 |
|----------------------------+-------------------------------|
| 27128 | Pins 1 & 2, 4 & 5 closed |
|----------------------------+-------------------------------|
| 27256 | Pins 2 & 3, 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CARD MODE CONFIGURATION |
|------------------------------------------------------------|
| Mode | SW1/5 | SW1/6 |
|-------------------------+-----------------+----------------|
| » | EGA | On | On |
|---+---------------------+-----------------+----------------|
| | CGA | Off | On |
|---+---------------------+-----------------+----------------|
| | Monochrome/Hercules | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY CONFIGURATION |
|------------------------------------------------------------|
| EGA Adapter | Monochrome | CGA |SW1/1|SW1/2|SW1/3|SW1/4|
| | Adapter |Adapter | | | | |
|-------------+-------------+--------+-----+-----+-----+-----|
|Color 40 x 25| Secondary | N/A | On | Off | Off | On |
|-------------+-------------+--------+-----+-----+-----+-----|
|Color 80 x 25| Secondary | N/A | Off | Off | Off | On |
|-------------+-------------+--------+-----+-----+-----+-----|
| EGA normal | Secondary | N/A | On | On | On | Off |
| color | | | | | | |
|-------------+-------------+--------+-----+-----+-----+-----|
| EGA | Secondary | N/A | Off | On | On | Off |
|Hi-resolution| | | | | | |
|-------------+-------------+--------+-----+-----+-----+-----|
| Monochrome | N/A |Color 40| On | Off | On | Off |
| | | x 25 | | | | |
|-------------+-------------+--------+-----+-----+-----+-----|
| Monochrome | N/A |Color 80| Off | Off | On | Off |
| | | x 25 | | | | |
|-------------+-------------+--------+-----+-----+-----+-----|
|Color 40 x 25| Primary | N/A | On | On | On | On |
|-------------+-------------+--------+-----+-----+-----+-----|
|Color 80 x 25| Primary | N/A | Off | On | On | On |
|-------------+-------------+--------+-----+-----+-----+-----|
| EGA normal | Primary | N/A | On | Off | On | On |
| color | | | | | | |
|-------------+-------------+--------+-----+-----+-----+-----|
| EGA | Primary | N/A | Off | Off | On | On |
|Hi-resolution| | | | | | |
|-------------+-------------+--------+-----+-----+-----+-----|
| Monochrome | N/A |Color 40| On | On | Off | On |
| | | x 25 | | | | |
|-------------+-------------+--------+-----+-----+-----+-----|
| Monochrome | N/A |Color 80| Off | On | Off | On |
| | | x 25 | | | | |
+------------------------------------------------------------+