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# JC INFORMATION SYSTEMS CORPORATION
286-12/16/20 MODEL 1080 VER 1.1C
Processor 80286
Processor Speed 12/16/20MHz
Chip Set C & T SCAT
Max. Onboard DRAM 4MB
Cache None
BIOS C & T
Dimensions 220mm x 220mm
I/O Options 8-bit factory test card slot
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Speaker | J1 | Turbo LED | J4 |
|---------------+----------+----------------------+----------|
| Power LED & | J2 | External battery | J6 |
| keylock | | | |
|---------------+----------+----------------------+----------|
| Reset switch | J3 | 8-bit factory test | S1 |
| | | card | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | J5 | pins 2 & 3 |
| | (internal battery) | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory normal operation | J5 | Open |
| | (external battery) | | |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J5 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | J7 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J7 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | U23, | U28 & | U4, | U9 & | U19-U36 | U1-U18 |
| | U27, | U36 | U8, | U18 | | |
| | | | | | | |
| | U31, | | U13, | | | |
| | U35 | | U17 | | | |
|-------+--------+--------+-------+-------+---------+--------|
| 512KB | (4) | (2) | NONE | NONE | N/A | N/A |
| | 44256 | 41256 | | | | |
|-------+--------+--------+-------+-------+---------+--------|
| 1MB | (4) | (2) | (4) | (2) | N/A | N/A |
| | 44256 | 41256 | 44256 | 41256 | | |
|-------+--------+--------+-------+-------+---------+--------|
| 2MB | N/A | N/A | N/A | N/A | (18) | NONE |
| | | | | | 411000 | |
|-------+--------+--------+-------+-------+---------+--------|
| 4MB | N/A | N/A | N/A | N/A | (18) | (18) |
| | | | | | 411000 | 411000 |
+------------------------------------------------------------+