ABC COMPUTER COMPANY, LTD.
A3875
|
Processor |
80386DX |
|
Processor Speed |
25/33/40MHz |
|
Chip Set |
Forex |
|
Max. Onboard DRAM |
32MB |
|
Cache |
32/64/128KB |
|
BIOS |
AMI |
|
Dimensions |
332mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
80387/3167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J3 |
Turbo switch |
J10 |
|
Reset switch |
J8 |
Speaker |
J11 |
|
Turbo LED |
J9 |
Power LED & keylock |
J12 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Monitor type select color |
J1 |
Closed | |
|
Monitor type select monochrome |
J1 |
Open | |
|
External battery select 3.6VDC |
J4 |
Closed | |
|
External battery select 6VDC |
J4 |
Open | |
|
CMOS memory normal operation |
J5 |
Open | |
|
CMOS memory clear |
J5 |
Closed | |
|
NPU mode select synchronous with CPU |
J6 |
pins 1 & 2 closed | |
|
NPU mode select asynchronous with CPU |
J6 |
pins 2 & 3 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 |
|
CACHE CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
TAG (U41) |
TAG (U42) |
|
32KB |
(4) 8K x 8 |
NONE |
(1) 8K x 8 |
NONE |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(2) 8K x 8 |
(2) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 32K x 8 |
NONE |
|
Note: Bank 0 = U44, U46, U48 & U50 | ||||
|
CACHE JUMPER CONFIGURATION | |
|
Size |
J7 |
|
32KB |
pins 1 & 2 closed |
|
64KB |
pins 2 & 3 closed |
|
128KB |
pins 2 & 3 closed |