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# JOINDATA SYSTEMS, INC.
G386SX/20
Processor 80386SX
Processor Speed 16/20MHz
Chip Set Intel
Max. Onboard DRAM 16MB
SRAM Cache None
BIOS AMI
Dimensions 330.2mm x 218.4mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+------------+--------------+----------|
| External battery | J2/pins 1 | Turbo switch | J20 |
| | & 4 | | |
|---------------------+------------+--------------+----------|
| Internal battery | J2/pins 2 | Turbo LED | J21 |
| | & 4 | | |
|---------------------+------------+--------------+----------|
| Power LED & keylock | J18 | Reset switch | J22 |
|---------------------+------------+--------------+----------|
| Speaker | J19 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|-------------------------------------+---------+------------|
| » | CMOS memory normal operation | J2 | pins 3 & 4 |
| | | | open |
|---+---------------------------------+---------+------------|
| | CMOS memory clear | J2 | pins 3 & 4 |
| | | | closed |
|---+---------------------------------+---------+------------|
| » | Monitor type select color | JP1 | closed |
|---+---------------------------------+---------+------------|
| | Monitor type select monochrome | JP1 | open |
|---+---------------------------------+---------+------------|
| » | NPU disabled | JP4 | pins 2 & 3 |
| | | | closed |
|---+---------------------------------+---------+------------|
| | NPU enabled | JP4 | pins 1 & 2 |
| | | | closed |
|------------------------------------------------------------|
| Note:J2/pin 4 is also used as ground for internal and |
| external battery. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
|Size | SIMM |Location | DIP |Location |Parity |Location |
|-----+--------+---------+-------+---------+-------+---------|
|512KB|(2) 256K| Bank 0 | NONE | NONE | NONE | NONE |
| | x 9 | | | | | |
|-----+--------+---------+-------+---------+-------+---------|
| 1MB |(4) 256K|Banks 0 &| NONE | NONE | NONE | NONE |
| | x 9 | 1 | | | | |
|-----+--------+---------+-------+---------+-------+---------|
|1.5MB|(4) 256K|Banks 0 &| (4) | Bank 4 | (2) | P-4 |
| | x 9 | 1 | 44256 | | 41256 | |
|-----+--------+---------+-------+---------+-------+---------|
| 2MB |(4) 256K|Banks 0 &| (8) |Banks 4 &| (4) |P-4 & P-5|
| | x 9 | 1 | 44256 | 5 | 41256 | |
|-----+--------+---------+-------+---------+-------+---------|
| 2MB |(2) 1M x| Bank 0 | NONE | NONE | NONE | NONE |
| | 9 | | | | | |
|-----+--------+---------+-------+---------+-------+---------|
|2.5MB|(2) 256K| Bank 0 | NONE | NONE | NONE | NONE |
| | x 9 | | | | | |
| | | Bank 1 | | | | |
| |(2) 1M x| | | | | |
| | 9 | | | | | |
|-----+--------+---------+-------+---------+-------+---------|
| 3MB |(4) 256K|Banks 0 &| (16) | Bank 2 | (2) | P-2 |
| | x 9 | 1 |411000 | |411000 | |
|-----+--------+---------+-------+---------+-------+---------|
| 4MB |(4) 1M x|Banks 0 &| NONE | NONE | NONE | NONE |
| | 9 | 1 | | | | |
|-----+--------+---------+-------+---------+-------+---------|
|4.5MB|(4) 1M x|Banks 0 &| (4) | Bank 4 | (2) | P-4 |
| | 9 | 1 | 44256 | | 41256 | |
|-----+--------+---------+-------+---------+-------+---------|
| 5MB |(4) 256K|Banks 0 &| (32) |Banks 2 &| (4) |P-2 & P-3|
| | x 9 | 1 |411000 | 3 |411000 | |
|-----+--------+---------+-------+---------+-------+---------|
| 6MB |(4) 1M x|Banks 0 &| (16) | Bank 2 | (2) | P-2 |
| | 9 | 1 |411000 | |411000 | |
|-----+--------+---------+-------+---------+-------+---------|
| 8MB |(4) 1M x|Banks 0 &| (32) |Banks 2 &| (4) |P-2 & P-3|
| | 9 | 1 |411000 | 3 |411000 | |
|-----+--------+---------+-------+---------+-------+---------|
| 8MB |(2) 4M x| Bank 0 | NONE | NONE | NONE | NONE |
| | 9 | | | | | |
|-----+--------+---------+-------+---------+-------+---------|
|8.5MB|(2) 256K| Bank 0 | NONE | NONE | NONE | NONE |
| | x 9 | | | | | |
| | | Bank 1 | | | | |
| |(2) 4M x| | | | | |
| | 9 | | | | | |
|-----+--------+---------+-------+---------+-------+---------|
| 9MB |(2) 256K| Bank 0 | (4) | Bank 4 | (2) | P-4 |
| | x 9 | | 44256 | | 41256 | |
| | | Bank 1 | | | | |
| |(2) 4M x| | | | | |
| | 9 | | | | | |
|-----+--------+---------+-------+---------+-------+---------|
|10MB |(2) 1M x| Bank 0 | NONE | NONE | NONE | NONE |
| | 9 | | | | | |
| | | Bank 1 | | | | |
| |(2) 4M x| | | | | |
| | 9 | | | | | |
|-----+--------+---------+-------+---------+-------+---------|
|12MB |(2) 1M x| Bank 0 | (16) | Bank 2 | (2) | P-2 |
| | 9 | |411000 | |411000 | |
| | | Bank 1 | | | | |
| |(2) 4M x| | | | | |
| | 9 | | | | | |
|-----+--------+---------+-------+---------+-------+---------|
|16MB |(4) 4M x| Bank 0 | NONE | NONE | NONE | NONE |
| | 9 | | | | | |
+------------------------------------------------------------+