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# IBM CORPORATION
PS/2 MODEL 70 386 16/20FS
Processor 80386DX
Processor Speed 16/20MHz
Chip Set IBM
Max. Onboard 6MB
DRAM
Cache None
BIOS IBM
Dimensions 355.6mm x 304.8mm
I/O Options Serial port, parallel port, pointing device
connector, proprietary hard/floppy drive
controller connector, proprietary 16-bit MCA
video adapter slot, VGA port
NPU Options 80387
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| Battery/speaker | J1 | Keyboard | J5 |
|-----------------+----------+--------------------+----------|
| Serial port | J2 | Hard/floppy drive | J6 |
|-----------------+----------+--------------------+----------|
| Parallel port | J3 | Video adapter slot | J7 |
|-----------------+----------+--------------------+----------|
| Pointing device | J4 | Display connector | J8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|--------+-----------------+----------------+----------------|
| 1MB | (1) 256K x 36 | NONE | NONE |
|--------+-----------------+----------------+----------------|
| 2MB | (1) 256K x 36 | (1) 256K x 36 | NONE |
|--------+-----------------+----------------+----------------|
| 2MB | (1) 512K x 36 | NONE | NONE |
|--------+-----------------+----------------+----------------|
| 3MB | (1) 256K x 36 | (1) 256K x 36 | (1) 256K x 36 |
|--------+-----------------+----------------+----------------|
| 4MB | (1) 512K x 36 | (1) 512K x 36 | NONE |
|--------+-----------------+----------------+----------------|
| 5MB | (1) 256K x 36 | (1) 512K x 36 | (1) 512K x 36 |
|--------+-----------------+----------------+----------------|
| 6MB | (1) 512K x 36 | (1) 512K x 36 | (1) 512K x 36 |
|------------------------------------------------------------|
| Notes:SIMMs are a proprietary IBM design, standard 36-bit |
| SIMMs can not be used. |
| |
| Onboard memory does not need to be totally populated in |
| order to use memory expansion cards. |
+------------------------------------------------------------+