INFORMTECH INTERNATIONAL, INC.
IT486SQ
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/66(internal)MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
32MB |
|
Cache |
None |
|
BIOS |
Phoenix |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Turbo LED |
J5 |
|
Keyboard connector |
J2A |
Power LED & keylock |
J19 |
|
Reset switch |
J3 |
Speaker |
J20 |
|
Turbo switch |
J4 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Monitor type select - CGA, EGA, VGA |
JP2 |
Closed |
|
Monitor type select - monochrome |
JP2 |
Open | |
|
|
I/O recovery time enabled |
JP13 |
pins 2 & 3 closed |
|
I/O recovery time disabled |
JP13 |
pins 1 & 2 closed | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(4) 256K x 9 |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
|
5MB |
(4) 256K x 9 |
(4) 1M x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CPU TYPE CONFIGURATION | |||
|
CPU Type |
JP9 |
JP10 |
JP11 |
|
80486SX |
pins 1 & 2 closed |
Open |
Open |
|
80486DX |
pins 2 & 3 closed |
Closed |
pins 2 & 3 closed |
|
P24 |
pins 2 & 3 closed |
Closed |
pins 1 & 2 closed |
|
SYSTEM CLOCK CONFIGURATION | |
|
System Clock |
JP5 |
|
20MHz |
pins 1 & 2 closed |
|
Half of alternative oscillator frequency at OSC3 |
pins 2 & 3 closed |
|
UPGRADE PROCESSOR TYPE CONFIGURATION | ||
|
Upgrade processor |
JP6 |
JP7 |
|
80486DX |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
80487SX or other |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
EXTERNAL BATTERY CONFIGURATION | |
|
Battery type |
JP3 |
|
3.6V Lithium battery ** |
pins 1 & 2 closed |
|
4.5V Alkaline Battery |
pins 2 & 4 closed |
|
6V (4 AA) Battery pack |
pins 3 & 4 closed |
|
6V Battery pack ** |
pins 1 & 3 closed |
|
Note:** with internal series current limiting resistor. | |