Little Max 386SX Motherboard Settings and Configuration
CSS LABORATORIES, INC.
Little Max 386SX
Processor | 80386SX |
Processor Speed | 16/20MHz |
Chip Set | C & T |
Max. Onboard DRAM | 16MB |
SRAM Cache | None |
BIOS | AMI |
Dimensions | 334mm x 127mm |
I/O Options | Auxiliary keyboard, IDE interface, floppy drive interface, parallel port, serial ports(2) |
NPU Options | 80387SX |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Speaker | J3 | Hard drive access LED | J40 |
Power LED & keylock | J4 | IDE interface LED | LED |
Turbo switch | J6 | Floppy drive interface | PJ1 |
Auxiliary keyboard | J7A | Parallel port | PJ2 |
Reset switch | J11 pins 1 & 2 | Serial port 1 | PJ3 |
Turbo LED | J11 pins 3 & 4 | Serial port 2 | PJ4 |
Front panel switches & LEDs | J39 | IDE interface | PJ5 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Floppy drive interface enabled | FDDEN | pins 2 & 3 closed |
| Floppy drive interface disabled | FDDEN | pins 1 & 2 closed |
» | IDE interface enabled | IDEEN | pins 2 & 3 closed |
| IDE interface disabled | IDEEN | pins 1 & 2 closed |
» | Factory configured - do not alter | J2 | open |
» | Monitor type select color | J8 | pins 2 & 3 closed |
| Monitor type select monochrome | J8 | pins 1 & 2 closed |
» | BIOS type select 27256 | J9 | pins 1 & 2 closed |
| BIOS type select 27128 | J9 | pins 2 & 3 closed |
| CPU speed select 16MHz | J10 | closed |
| CPU speed select 20MHz | J10 | open |
» |
Pipeline mode enabled | J1 W1 W2 | pins 2 & 3 closed pins 1 & 2 closed pins 2 & 3 closed |
|
Pipeline mode disabled | J1 W1 W2 | pins 1 & 2 closed pins 2 & 3 closed pins 1 & 2 closed |
DRAM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
512KB | (2) 256K x 9 | NONE |
1MB | (2) 256K x 9 | (2) 256K x 9 |
2MB | (2) 1M x 9 | NONE |
4MB | (2) 1M x 9 | (2) 1M x 9 |
8MB | (2) 4M x 9 | NONE |
16MB | (2) 4M x 9 | (2) 4M x 9 |
SERIAL PORT 1 CONFIGURATION | |||||
COM | IRQ Interrupt | I/O Address | Jumper PJ6 | S0 | S1 |
COM 2 | IRQ3 | 2F8h | pins 1 & 3 | pins 1 & 2 | pins 2 & 3 |
COM 1 | IRQ4 | 3F8h | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
Disabled | N/A | N/A | N/A | pins 1 & 2 | pins 1 & 2 |
SERIAL PORT 2 CONFIGURATION | |||||
COM | IRQ Interrupt | I/O Address | Jumper PJ6 | S2 | S3 |
COM 1 | IRQ4 | 3F8h | pins 2 & 4 | pins 1 & 2 | pins 2 & 3 |
COM 2 | IRQ3 | 2F8h | pins 3 & 4 | pins 2 & 3 | pins 2 & 3 |
Disabled | N/A | N/A | N/A | pins 1 & 2 | pins 1 & 2 |
PARALLEL PORT 1 (PJ2) CONFIGURATION | |||||
LPT | IRQ Interrupt | I/O Address | P0 | P1 | PRT |
LPT 1 | IRQ7 | 3F8h | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
LPT 2 | IRQ5 | 2F8h | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
LPT 3 | IRQ7 | 3BCh | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
Disabled | N/A | N/A | pins 1 & 2 | pins 1 & 2 | N/A |
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