INFORMTECH INTERNATIONAL, INC.
IT286SB
Processor |
80286 |
Processor Speed |
5/6/8/10MHz |
Chip Set |
C & T |
Max. Onboard DRAM |
1MB |
SRAM Cache |
None |
BIOS |
Unknown |
Dimensions |
330mm x 218mm |
I/O Options |
None |
NPU Options |
80287 |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
Speaker |
J13 |
External battery |
J18 |
Power LED & keylock |
J16 |
Turbo LED |
J20 |
Reset switch |
J17 |
USER CONFIGURABLE SETTINGS | |||
Function |
Jumper |
Position | |
» |
Power good signal detect from power supply |
J23 |
pins 1 & 2 closed |
Power good signal detect from board |
J23 |
pins 2 & 3 closed | |
» |
CPU speed software selectable |
SW1 |
pins 2 & 3 closed |
CPU speed select 5.33/6.7MHz |
SW1 |
pins 1 & 2 closed | |
CPU speed select 8/10MHz |
SW1 |
open | |
» |
Monitor type select monochrome |
SW2 |
pins 2 & 3 closed |
Monitor type select color |
SW2 |
pins 1 & 2 closed |
DRAM CONFIGURATION | |||||
Size |
Bank 0 |
Bank 1 |
Jumper W4 |
Jumper W5 | |
256KB |
(18) 4164 |
(18) 4164 |
pins 1 & 2 closed |
pins 1 & 2 closed | |
512KB |
(18) 41256 |
NONE |
pins 2 & 3 closed |
pins 1 & 2 closed | |
» |
640KB |
(18) 41256 |
(18) 4164 |
pins 1 & 2 closed |
pins 2 & 3 closed |
1024KB |
(18) 41256 |
(18) 41256 |
pins 2 & 3 closed |
pins 2 & 3 closed |
NPU CLOCK RATE CONFIGUARATION | |||
NPU |
Clock Rate |
Jumper W7 |
Jumper W8 |
80287-6 |
3.6/5.33MHz |
closed |
pins 1 & 2 closed |
80287-6 |
4.46MHz |
closed |
pins 1 & 2 closed |
80287-8 |
5.33/8MHz |
open |
pins 2 & 3 closed |
80287-8 |
4.46/6.67MHz |
closed |
pins 1 & 2 closed |
80287-10 |
6.67/10MHz |
open |
pins 2 & 3 closed |
BIOS TYPE CONFIGURATION | ||||
BIOS |
Size |
Jumper W2 |
Jumper W3 | |
» |
27128 |
32K EPROM |
pins 2 & 3 closed |
pins 1 & 2 closed |
27256 |
64K EPROM |
pins 1 & 2 closed |
pins 1 & 2 closed | |
23128 |
32K MASK ROM |
pins 2 & 3 closed |
pins 2 & 3 closed | |
23256 |
64K MASK ROM |
pins 1 & 2 closed |
pins 2 & 3 closed |
BATTERY TYPE CONFIGUARATION | |||
Battery |
J21 |
J22 | |
» |
Internal lithium (2 x 3VDC) |
pins 1 & 2 closed |
open |
External lithium (6VDC) |
open |
closed | |
External alkaline (6VDC) |
open |
open |