CSS LABORATORIES, INC.
MINIMAX/LITTLE MAX 486
|
Processor |
80486SX/80486DX/80486DX2/Pentium Overdrive |
|
Processor Speed |
25/33/50(internal)/50/66(internal)MHz |
|
Chip Set |
SIS |
|
Max. Onboard DRAM |
16MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
Floppy drive interface, IDE interface, parallel port, serial ports (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J4 |
Floppy drive interface |
PJ1 |
|
Reset switch/Turbo LED |
J5 |
Parallel port |
PJ2 |
|
Turbo switch (not available on MiniMax) |
J6 |
Serial port 1 |
PJ3 |
|
Speaker |
J9 |
Serial port 2 |
PJ4 |
|
Equipment panel connector |
J39 |
IDE interface |
PJ5 |
|
IDE interface LED |
J40 |
Riser Card |
SL1 |
|
IDE interface LED (on board IDE) |
LED | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
CPU speed select iOSC/1 (50/66MHz) |
J1 |
pins 1 & 2 closed |
|
CPU speed select iOSC/2 (25/33MHz) |
J1 |
pins 2 & 3 closed | |
|
|
Ocsillator type select OSC1 (25/50MHz) |
J2 |
pins 1 & 2 closed |
|
Ocsillator type select OSC3 (33/66MHz) |
J2 |
pins 2 & 3 closed | |
|
|
Monitor type select color |
J3 |
pins 1 & 2 closed |
|
Monitor type select monochrome |
J3 |
pins 2 & 3 closed | |
|
|
Factory configured - do not alter |
J11 |
Open |
|
|
Floppy drive interface enabled |
S4 |
pins 2 & 3 closed |
|
Floppy drive interface disabled |
S4 |
pins 1 & 2 closed | |
|
|
IDE interface enabled |
S5 |
pins 2 & 3 closed |
|
IDE interface disabled |
S5 |
pins 1 & 2 closed | |
|
SERIAL PORT CONFIGURATION (PJ3) | ||||
|
Port 1 |
IRQ |
S0 |
S1 |
PJ6 |
|
Disabled |
N/A |
pins 1 & 2 closed |
pins 1 & 2 closed |
N/A |
|
COM1 |
IRQ4 |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
COM2 |
IRQ3 |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 3 closed |
|
SERIAL PORT CONFIGURATION (PJ4) | ||||
|
Port 2 |
IRQ |
S2 |
S3 |
PJ6 |
|
Disabled |
N/A |
pins 1 & 2 closed |
pins 1 & 2 closed |
N/A |
|
COM1 |
IRQ4 |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 4 closed |
|
COM2 |
IRQ3 |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 3 & 4 closed |
|
PARALLEL PORT CONFIGURATION | ||||
|
LPT |
IRQ |
P0 |
P1 |
PRT |
|
Disabled |
N/A |
pins 1 & 2 closed |
pins 1 & 2 closed |
N/A |
|
LPT 1 |
IRQ7 |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
LPT 2 |
IRQ5 |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
LPT 3 |
IRQ7 |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(1) 256K x 36 |
NONE |
|
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
|
2MB |
(1) 512K x 36 |
NONE |
|
4MB |
(1) 1M x 36 |
NONE |
|
5MB |
(1) 256K x 36 |
(1) 1M x 36 |
|
6MB |
(1) 512K x 36 |
(1) 1M x 36 |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
|
8MB |
(1) 2M x 36 |
NONE |
|
10MB |
(1) 512K x 36 |
(1) 2M x 36 |
|
16MB |
(1) 2M x 36 |
(1) 2M x 36 |
|
DRAM JUMPER CONFIGURATION | ||
|
Size |
J8 |
J10 |
|
1MB |
Open |
Open |
|
2MB |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
2MB |
pins 2 & 3 closed |
Open |
|
4MB |
Open |
Open |
|
5MB |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
6MB |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
8MB |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
8MB |
pins 2 & 3 closed |
Open |
|
10MB |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
16MB |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
Note: This board accepts 4M x 36 SIMMS, but jumper settings are not identified by the manufacturer. | ||
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 32K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
W6 |
W7 |
W8 |
W9 |
|
64KB |
Open |
Open |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
128KB |
Open |
Closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
256KB |
Closed |
Closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
CPU TYPE CONFIGURATION | |||
|
Type |
W2 |
W4 |
W5 |
|
80486SX |
pins 1 & 2 closed |
pins 1 & 2 closed |
Closed |
|
80486DX |
pins 2 & 3 closed |
pins 2 & 3 closed |
Open |
|
CPU TYPE CONFIGURATION (OVERDRIVE) | ||
|
Type |
W1 |
W3 |
|
Overdrive installed |
pins 1 & 2 closed |
Closed |
|
Overdrive not installed |
pins 2 & 3 closed |
Open |
|
EQUIPMENT PANEL CONNECTOR PIN OUT | |
|
Description |
J39 |
|
Ground |
pin 1 |
|
Power |
pin 1 |
|
Hard drive LED |
pin 3 |
|
Not used |
pin 4 |
|
Power |
pin 5 |
|
Ground |
pin 6 |
|
Turbo LED |
pin 7 |
|
Keyboard inhibit |
pin 8 |
|
Power |
pin 9 |
|
Reset button |
pin 10 |