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# EVEREX SYSTEMS, INC.
MICRO ENHANCER EV-657B (VER.1.0)
Card Type Video card
Video Chip Set Unidentified
Highest Resolution Supported 720 x 348
Maximum Video Memory 256 KB
Data Bus 8-bit ISA
Video Types Supported EGA
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|-----------------+-------+--------------------------+-------|
| RCA jack | J1 | 9-pin digital video port | J3 |
|-----------------+-------+--------------------------+-------|
| RCA jack | J2 | Feature connector | J4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------------+-------+-----------|
| » | Factory configured - do not alter | W1 | Pins 2 & |
| | | | 3 closed |
|---+------------------------------------+-------+-----------|
| » | I/O port address selected at 3XX | W3 | Pins 2 & |
| | | | 3 closed |
|---+------------------------------------+-------+-----------|
| | I/O port address selected at 2XX | W3 | Pins 1 & |
| | | | 2 closed |
|---+------------------------------------+-------+-----------|
| » | Factory configured - do not alter | W4 | N/A |
|---+------------------------------------+-------+-----------|
| » | Factory configured - do not alter | W7 | Pins 1 & |
| | | | 2 closed |
|---+------------------------------------+-------+-----------|
| » | Non-Maskable Interrupt selected | W10 | Pins 1 & |
| | (NMI) | | 2 closed |
|---+------------------------------------+-------+-----------|
| | Interrupt request selected (IRQ) | W10 | Pins 2 & |
| | | | 3 closed |
|---+------------------------------------+-------+-----------|
| » | CRTC Vertical interrupt enabled | W12/G | Closed |
|---+------------------------------------+-------+-----------|
| | CRTC Vertical interrupt disabled | W12/G | Open |
|---+------------------------------------+-------+-----------|
| » | Operation in PC-XT slot 8 disabled | W13 | Open |
|---+------------------------------------+-------+-----------|
| | Operation in PC-XT slot 8 enabled | W13 | Closed |
|---+------------------------------------+-------+-----------|
| » | Emulation disabled | SW1/5 | Off |
|---+------------------------------------+-------+-----------|
| | Emulation enabled | SW1/5 | On |
|---+------------------------------------+-------+-----------|
| » | Factory configured - do not alter | SW1/6 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECTION |
|------------------------------------------------------------|
|Setting | W12/A | W12/B | W12/C | W12/D | W12/E | W12/F |
|--------+--------+--------+--------+--------+-------+-------|
| 2 | Open | Open | Open | Open | Open |Closed |
|--------+--------+--------+--------+--------+-------+-------|
| 3 | Closed | Open | Open | Open | Open | Open |
|--------+--------+--------+--------+--------+-------+-------|
| 4 | Open | Closed | Open | Open | Open | Open |
|--------+--------+--------+--------+--------+-------+-------|
| 5 | Open | Open | Closed | Open | Open | Open |
|--------+--------+--------+--------+--------+-------+-------|
| 6 | Open | Open | Open | Closed | Open | Open |
|--------+--------+--------+--------+--------+-------+-------|
| 7 | Open | Open | Open | Open |Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BOOT-UP MODE SELECTION |
|------------------------------------------------------------|
| Monitor | Mode & |SW1/1|SW1/2|SW1/3|SW1/4|SW1/7|SW1/8|
| | Format | | | | | | |
|------------+-----------+-----+-----+-----+-----+-----+-----|
|»| Enhanced | EGA 80x25 | Off | On | On | Off | On | On |
|-+----------+-----------+-----+-----+-----+-----+-----+-----|
| | Enhanced |Color 80x25| On | On | On | Off | On | On |
|-+----------+-----------+-----+-----+-----+-----+-----+-----|
| | Color |Color 80x25| Off | Off | Off | On | On | Off |
|-+----------+-----------+-----+-----+-----+-----+-----+-----|
| | Color |Color 40x25| On | Off | Off | On | On | Off |
|-+----------+-----------+-----+-----+-----+-----+-----+-----|
| |Monochrome|Monochrome | Off | Off | On | Off | Off | Off |
+------------------------------------------------------------+