TEXAS MICROSYSTEMS, INC.
LS486/L486
|
Processor |
80486SX/80487SX/80486DX/80486DX2 |
|
Processor Speed |
33/50(internal)/66(internal)MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
32MB |
|
Maximum Video Memory |
None |
|
Cache |
None |
|
BIOS |
Unidentified |
|
Dimensions |
Unidentified |
|
I/O Options |
Floppy drive interface, IDE interface, SCSI interface, parallel port, serial ports (2), video board connector |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
SCSI interface |
J1 |
Auxiliary keyboard connector |
J7 |
|
IDE interface |
J2 |
External battery |
JP4 |
|
Floppy drive interface |
J3 |
Hard drive LED |
JP5 |
|
Serial port 2 |
J4 |
Video board connector |
JP9 |
|
Serial port 1 |
J5 |
Texas Micro keyboard connector |
JP11 |
|
Parallel port |
J6 |
Video board connector |
JP13 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Battery type select internal |
JP4 |
Pins 1 & 2 closed |
|
Battery type select external |
JP4 |
Closed | |
|
|
Watchdog timer disabled |
JP12 |
Pins 2 & 3 closed |
|
Watchdog timer enabled |
JP12 |
Pins 1 & 2 closed | |
|
On board SCSI enabled |
JP15 |
Pins 1 & 2 closed | |
|
On board SCSI disabled |
JP15 |
Pins 2 & 3 closed | |
|
|
Monitor type select color |
SW1/1 |
On |
|
Monitor type select monochrome |
SW1/1 |
Off | |
|
|
Flash BIOS enabled |
SW1/2 |
Off |
|
Flash BIOS disabled |
SW1/2 |
On | |
|
|
CMOS memory normal operation |
SW1/3 |
Off |
|
CMOS memory clear |
SW1/3 |
On | |
|
|
I/O address select 270H |
SW1/4 |
Off |
|
I/O address select 370H |
SW1/4 |
On | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(1) 256K x 36 |
None |
|
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
|
4MB |
(1) 1M x 36 |
None |
|
5MB |
(1) 1M x 36 |
(1) 256K x 36 |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
(1) 4M x 36 |
None |
|
17MB |
(1) 4M x 36 |
(1) 256K x 36 |
|
20MB |
(1) 4M x 36 |
(1) 1M x 36 |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
|
CPU TYPE SELECTION | |||
|
Type |
JP1 |
JP2 |
JP3 |
|
80486SX |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
|
80487SX |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
80486DX |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
|
80486DX2 |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
|
CPU TYPE SELECTION (80486SX ONLY) | |
|
Multiplier |
JP10 |
|
PQFP |
Pins 2 & 3 closed |
|
PGA |
Pins 1 & 2 closed |
|
SERIAL PORT 2 SELECTION | ||||
|
Setting |
JP6 |
JP7 |
JP8 | |
|
RS232 |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed | |
|
RS422 |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed | |
|
RS485 |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed | |
|
WATCHDOG TIMER SELECTION | ||
|
Timer |
JP14 | |
|
1.2 seconds |
Pins 1 & 2 closed | |
|
150ms |
Pins 2 & 3 closed | |
|
600ms |
Open | |