TEXAS MICRO SYSTEMS, INC.
E486C
|
Processor |
80486DX/80486DX2/80486DX4 |
|
Processor Speed |
25/33/50(internal)/50/66(internal)/100(internal)MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
64MB |
|
Maximum Video Memory |
None |
|
Cache |
256KB |
|
BIOS |
Unidentified |
|
Dimensions |
355mm x 304mm |
|
I/O Options |
Auxiliary bus slots (6), CPU slot, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Serial port 2 |
J1 |
PS/2 mouse port |
J5 |
|
IDE interface |
J2 |
Parallel port |
J9 |
|
Serial port 1 |
J3 |
IDE interface LED |
JP4 |
|
Floppy drive interface |
J4 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Factory configured - do not alter |
JP6 |
Pins 1 & 2, 3 & 4 closed |
|
|
Counter timing select free running |
JP9 |
Pins 2 & 3 closed |
|
Counter timing select CPU heartbeat (ADS) |
JP9 |
Pins 1 & 2 closed | |
|
|
Factory configured - do not alter |
JP11 |
Pins 2 & 3 closed |
|
|
Factory configured - do not alter |
JP12 |
Pins 2 & 3 closed |
|
|
Factory configured - do not alter |
JP14 |
Open |
|
|
PS/2 mouse IRQ 12 unbuffered |
JP15 |
Pins 1 & 2 closed |
|
PS/2 mouse IRQ 12 buffered |
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 270 |
SW1/4 |
Off | |
|
I/O address select 370 |
SW1/4 |
On | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(1) 256K x 36 |
None |
None |
None |
|
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
None |
None |
|
3MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
None |
|
4MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
4MB |
(1) 1M x 36 |
None |
None |
None |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
None |
None |
|
10MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
None |
|
16MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
(1) 4M x 36 |
None |
None |
None |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
None |
None |
|
32MB |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
48MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
None |
|
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
CACHE CONFIGURATION |
|
Note: 256KB cache is factory installed and is not configurable. |
|
CPU SPEED SELECTION | |
|
Speed |
JP5 |
|
25MHz |
Pins 5 & 6, 7 & 8 closed |
|
33MHz |
Pins 5 & 6 closed |
|
50iMHz |
Pins 5 & 6, 7 & 8 closed |
|
50MHz |
Pins 1 & 2, 5 & 6 closed |
|
66iMHz |
Pins 5 & 6 closed |
|
100iMHz |
Pins 5 & 6 closed |
|
CPU TYPE SELECTION | |
|
Type |
JP17 |
|
80486DX |
Pins 2 & 3 closed |
|
80486DX2 |
Pins 2 & 3 closed |
|
80486DX4 |
Pins 1 & 2 closed |
|
CPU MULTIPLIER SELECTION | |
|
Multiplier |
JP18 |
|
2x |
Pins 1 & 2 closed |
|
3x |
Pins 2 & 3 closed |
|
SERIAL PORT 2 SELECTION | ||||
|
Setting |
JP1 |
JP2 |
JP3 | |
|
RS-232 |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed | |
|
RS-422 |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed | |
|
RS-485 |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed | |
|
BUS CLOCK BUFFER SELECTION | ||
|
Setting |
JP7 |
JP16 |
|
Unbuffered |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
Buffered |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
DC power |
J20 |
Front keyboard connector |
JP15 |
|
DC power |
J21 |
CPU slot |
SL1 |
|
Rear keyboard connector |
JP14 |
Auxiliary bus slots |
SL2 SL6 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Slot 7 card type select EISA |
JP1 |
Pins 2 & 3 closed |
|
Slot 7 card type select ISA |
JP1 |
Pins 1 & 2 closed | |
|
|
Slot 5 card type select EISA |
JP2 |
Pins 2 & 3 closed |
|
Slot 5 card type select ISA |
JP2 |
Pins 1 & 2 closed | |
|
|
Slot 3 card type select EISA |
JP3 |
Pins 2 & 3 closed |
|
Slot 3 card type select ISA |
JP3 |
Pins 1 & 2 closed | |
|
|
Slot 1 card type select EISA |
JP4 |
Pins 2 & 3 closed |
|
Slot 1 card type select ISA |
JP4 |
Pins 1 & 2 closed | |
|
|
Slot 9 card type select EISA |
JP5 |
Pins 2 & 3 closed |
|
Slot 9 card type select ISA |
JP5 |
Pins 1 & 2 closed | |
|
|
Slot 11 card type select EISA |
JP6 |
Pins 2 & 3 closed |
|
Slot 11 card type select ISA |
JP6 |
Pins 1 & 2 closed | |
|
|
Slot 13 card type select EISA |
JP7 |
Pins 2 & 3 closed |
|
Slot 13 card type select ISA |
JP7 |
Pins 1 & 2 closed | |
|
|
Slot 6 card type select EISA |
JP8 |
Pins 2 & 3 closed |
|
Slot 6 card type select ISA |
JP8 |
Pins 1 & 2 closed | |
|
|
Slot 4 card type select EISA |
JP9 |
Pins 2 & 3 closed |
|
Slot 4 card type select ISA |
JP9 |
Pins 1 & 2 closed | |
|
|
Slot 2 card type select EISA |
JP10 |
Pins 2 & 3 closed |
|
Slot 2 card type select ISA |
JP10 |
Pins 1 & 2 closed | |
|
|
Slot 8 card type select EISA |
JP11 |
Pins 2 & 3 closed |
|
Slot 8 card type select ISA |
JP11 |
Pins 1 & 2 closed | |
|
|
Slot 10 card type select EISA |
JP12 |
Pins 2 & 3 closed |
|
Slot 10 card type select ISA |
JP12 |
Pins 1 & 2 closed | |
|
|
Slot 12 card type select EISA |
JP13 |
Pins 2 & 3 closed |
|
Slot 12 card type select ISA |
JP13 |
Pins 1 & 2 closed | |
|
Note: Slot 1 is located at the top of the diagram. | |||