CACHE COMPUTERS, INC.
386SX-20/25 PLUS (Model 320)
|
Processor |
80386SX |
|
Processor Speed |
20/25MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
16MB |
|
Cache |
64KB |
|
BIOS |
AMI/Cache/Phoenix |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
Parallel port, serial ports (2), game port, floppy drive interface, IDE interface |
|
NPU Options |
80387SX |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Auxiliary keyboard |
J2 |
COM2 at 2F8-2FFh |
P2 |
|
External battery |
JP1 |
Game port at 201h |
P3 |
|
IDE LED |
JP8 |
Parallel port at 378-37Fh |
P5 |
|
Turbo LED |
JP12 |
IDE interface |
P6 |
|
Speaker |
JP13 |
Floppy drive interface |
P7 |
|
Power LED & keylock |
JP14 |
Reset switch |
SW1 |
|
COM1 at 3F8-3FFh |
P1 |
Turbo switch |
SW2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper/Switch |
Position | |
|
Parallel port enabled |
JP3 |
pins 1 & 2 closed | |
|
Parallel port disabled |
JP3 |
pins 2 & 3 closed | |
|
IRQ 7 enabled |
JP5 |
Closed | |
|
IRQ 7 disabled |
JP5 |
Open | |
|
IRQ 3 enabled |
JP6 |
Closed | |
|
IRQ 3 disabled |
JP6 |
Open | |
|
IRQ 4 enabled |
JP7 |
Closed | |
|
IRQ 4 disabled |
JP7 |
Open | |
|
Monitor type set color (AMI BIOS) |
JP9 |
Closed | |
|
Monitor type set monochrome (AMI BIOS) |
JP9 |
Open | |
|
Security enabled (MR BIOS) |
JP9 |
Closed | |
|
Security disabled (MR BIOS) |
JP9 |
Open | |
|
CMOS memory normal operation |
JP11 |
Open | |
|
CMOS memory clear |
JP11 |
Closed | |
|
CPU speed switchable from keyboard |
JP15 |
pins 1 & 2 closed | |
|
CPU speed switchable from turbo switch |
JP15 |
pins 2 & 3 closed | |
|
IDE interface enabled |
SW3/1 |
Off | |
|
IDE interface disabled |
SW3/1 |
On | |
|
Floppy interface enabled |
SW3/2 |
Off | |
|
Floppy interface disabled |
SW3/2 |
On | |
|
Factory configured - do not alter |
SW3/3 |
N/A | |
|
Floppy interface select primary (only with 2 controllers) |
SW3/9 |
On | |
|
Floppy interface select secondary (only with 2 controllers) |
SW3/9 |
Off | |
|
Configuration select manual |
SW3/10 |
On | |
|
Configuration select automatic |
SW3/10 |
Off | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(2) 256K x 9 |
(2) 256K x 9 |
NONE |
NONE |
|
2MB |
(2) 256K x 9 |
(2) 256K x 9 |
(2) 256K x 9 |
(2) 256K x 9 |
|
2MB |
(2) 1M x 9 |
NONE |
NONE |
NONE |
|
3MB |
(2) 256K x 9 |
(2) 1M x 9 |
NONE |
NONE |
|
4MB |
(2) 1M x 9 |
(2) 1M x 9 |
NONE |
NONE |
|
5MB |
(2) 256K x 9 |
(2) 256K x 9 |
(2) 1M x 9 |
(2) 1M x 9 |
|
6MB |
(2) 1M x 9 |
(2) 1M x 9 |
(2) 1M x 9 |
NONE |
|
8MB |
(2) 1M x 9 |
(2) 1M x 9 |
(2) 1M x 9 |
(2) 1M x 9 |
|
9MB |
(2) 256K x 9 |
(2) 256K x 9 |
(2) 4M x 9 |
NONE |
|
10MB |
(2) 1M x 9 |
(2) 4M x 9 |
NONE |
NONE |
|
12MB |
(2) 1M x 9 |
(2) 1M x 9 |
(2) 4M x 9 |
NONE |
|
16MB |
(2) 4M x 9 |
(2) 4M x 9 |
NONE |
NONE |
|
CACHE CONFIGURATION | |
|
Size |
Bank 0 |
|
64KB |
(8) 8K x 8 |
|
Note:The location of the cache is unidentified. | |
|
PARALLEL PORT CONFIGURATION | |||
|
Setting |
SW3/7 |
SW3/8 | |
|
LPT2 |
Off |
Off | |
|
LPT1 |
Off |
On | |
|
LPT3 |
On |
Off | |
|
Disabled |
On |
On | |
|
SERIAL PORT CONFIGURATION | ||||
|
Serial port (P1) |
Serial port (P2) |
SW3/4 |
SW3/5 |
SW3/6 |
|
COM1 |
COM2 |
Off |
Off |
Off |
|
Disabled |
COM2 |
Off |
Off |
On |
|
COM1 |
Disabled |
Off |
On |
Off |
|
Disabled |
Disabled |
Off |
On |
On |
|
COM2 |
COM1 |
On |
Off |
Off |
|
Disabled |
COM1 |
On |
Off |
On |
|
COM2 |
Disabled |
On |
On |
Off |
|
Disabled |
Disabled |
On |
On |
On |