ICL
DRS M50/M55
|
Processor |
80386SX |
|
Processor Speed |
16/20MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
8MB |
|
Cache |
None |
|
BIOS |
Unidentified |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
Floppy drive interface, IDE interface, parallel port, serial ports (2), VGA port, riser slot |
|
NPU Options |
80387SX |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Reset switch |
CN1 |
Serial port 1 |
P1 |
|
LEDs & security lock |
CN2 |
Parallel port |
P2 |
|
Keyboard/mouse connector |
CN3 |
Serial port 2 |
P3 |
|
IDE interface |
JP1 |
VGA port (on VGA board) |
P4 |
|
Floppy drive interface |
JP2 |
Riser slot |
SL1 |
|
USER CONFIGURABLE SETTINGS (MAINBOARD) | |||
|
Function |
Jumper |
Position | |
|
Password enabled |
J3 |
Pins 1 & 2 closed | |
|
Password disabled |
J3 |
Pins 2 & 3 closed | |
|
Security lock enabled |
J9 |
Open | |
|
Security lock disabled |
J9 |
Closed | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
2MB |
(2) 1M x 9 |
None |
None |
None |
|
4MB |
(2) 1M x 9 |
(2) 1M x 9 |
None |
None |
|
8MB |
(2) 1M x 9 |
(2) 1M x 9 |
(2) 1M x 9 |
(2) 1M x 9 |
|
CPU SPEED CONFIGURATION | ||
|
Speed |
J4 |
J5 |
|
16MHz |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
20MHz |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
USER CONFIGURABLE SETTINGS (VGA BOARD) | |||
|
Function |
Jumper |
Position | |
|
|
On board video enabled |
J1 |
Closed |
|
On board video disabled |
J1 |
Open | |
|
|
VGA IRQ9 enabled |
J4 |
Closed |
|
VGA IRQ9 disabled |
J4 |
Open | |
|
|
VGA BIOS enabled |
SW1 |
Pins 1 & 2 closed |
|
VGA BIOS disabled |
SW1 |
Pins 2 & 3 closed | |