ROBOTECH, INC.
COBRA-RT VER. B/C/D/E
|
Processor |
CX486S/80486SX/CX487S/80487SX/80486DX/ODP486SX/80486DX2/ 80486DX4/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
SIS |
|
Max. Onboard DRAM |
64MB |
|
Cache |
32/64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
254mm x 220mm |
|
I/O Options |
32-bit VESA local bus slots (3), green PC connector |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Daughter board interface |
BC20 |
Reset switch |
JP15D |
|
External battery |
JP8 |
Turbo switch |
JP15E |
|
Speaker |
JP15A |
+5vDC ground |
JP15F |
|
Power LED & keylock |
JP15B |
Green PC connector |
JP34 |
|
Turbo LED |
JP15C |
32-bit VESA local bus slots |
SL1 - SL3 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
CMOS memory normal operation |
JP3 |
Open |
|
CMOS memory clear |
JP3 |
Closed | |
|
|
Power good signal detect from power supply |
JP11 |
pins 1 & 2 closed |
|
Power good signal detect from board |
JP11 |
pins 2 & 3 closed | |
|
|
CPU type select 1 CPU on board (PQFP or PGA) |
JP12 |
pins 1 & 2 closed |
|
CPU type select 2 CPU on board (PGA enabled PQFP disabled) |
JP12 |
pins 2 & 3 closed | |
|
|
Green PC mode enabled |
JP14 |
pins 2 & 3 closed |
|
Green PC mode disabled |
JP14 |
pins 1 & 2 closed | |
|
|
VESA bus address type select asynchronous (40/50mhz CPU) |
JP19 |
pins 1 & 2 closed |
|
VESA bus address type select synchronous |
JP19 |
pins 2 & 3 closed | |
|
|
VESA bus data type select synchronous |
JP20 |
pins 1 & 2 closed |
|
VESA bus data type select aynchronous |
JP20 |
pins 2 & 3 closed | |
|
|
VGA card select normal |
JP28 |
pins 1 & 2 closed |
|
VGA card select Weitek Power 9000 VGA only |
JP28 |
pins 2 & 3 closed | |
|
|
Factory configured - do not alter |
JP36 |
Open |
|
|
Mouse COM port select COM2 |
JP39 |
pins 1 & 2 closed |
|
Mouse COM port select COM1 |
JP39 |
pins 2 & 3 closed | |
|
|
80486DX4 CPU speed select 3x |
JP41 |
pins 1 & 2 closed |
|
80486DX4 CPU speed select 2x |
JP41 |
pins 2 & 3 closed | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(4) 256K x 9 |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
|
5MB |
(4) 256K x 9 |
(4) 1M x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
17MB |
(4) 256K x 9 |
(4) 4M x 9 |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
64MB |
(4) 16M x 9 |
NONE |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
32KB |
(4) 8K x 8 |
NONE |
(1) 8K x 8 |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 16K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |||||
|
Size |
JP5 |
JP6 |
JP7 |
JP9 |
JP10 |
|
32KB |
2 & 3 |
Open |
Open |
Open |
Open |
|
64KB |
1 & 2 |
Open |
Open |
Closed |
Open |
|
128KB |
2 & 3 |
2 & 3 |
Closed |
Closed |
Open |
|
256KB |
1 & 2 |
1 & 2 |
Closed |
Closed |
2 & 3 |
|
256KB |
1 & 2 |
1 & 2 |
Closed |
Closed |
1 & 2 |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU TYPE CONFIGURATION | ||
|
Type |
JP16 |
JP17 |
|
CX486S |
Open |
pins 2 & 3 closed |
|
80486SX |
Open |
pins 2 & 3 closed |
|
80487SX |
pins 2 & 3 closed |
pins 1 & 2, 3 & 4 closed |
|
ODP486SX |
pins 2 & 3 closed |
pins 1 & 2, 3 & 4 closed |
|
80486DX/DX2/DX4 |
pins 1 & 2 closed |
pins 1 & 2, 3 & 4 closed |
|
Pentium Overdrive |
pins 1 & 2 closed |
pins 1 & 2, 3 & 4 closed |
|
CPU SPEED CONFIGURATION | ||||
|
Speed |
JP21 |
JP22 |
JP23 |
JP27 |
|
25MHz |
Closed |
Open |
Closed |
Open |
|
33MHz |
Closed |
Closed |
Open |
Open |
|
40MHz |
Open |
Open |
Closed |
Closed |
|
50iMHz |
Closed |
Open |
Closed |
Open |
|
50MHz |
Open |
Closed |
Open |
Closed |
|
66iMHz |
Closed |
Closed |
Open |
Open |
|
CPU VOLTAGE CONFIGURATION | ||
|
Voltage |
JP42 |
JP44 |
|
3.3v (80486DX4) |
Open |
Open |
|
5v |
pins 3 & 5, 4 & 6 closed |
pins 1 & 2, 3 & 4 closed |
|
VESA BUS CLOCK CONFIGURATION | |||
|
Setting |
JP25 |
JP26 |
JP29 |
|
Synchronous |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
Asynchronous |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
Note: these settings are valid for SL1, SL2 & SL3. | |||
|
CIRRUS LOGIC VIDEO CARD CONFIGURATION (VER. AB) | ||
|
CPU speed |
JP19 |
JP20 |
|
25MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
33MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
40MHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
50iMHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
50MHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
66iMHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
CIRRUS LOGIC VIDEO CARD CONFIGURATION (VER. AC) | ||
|
CPU speed |
JP19 |
JP20 |
|
25MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
33MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
40MHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
50iMHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
50MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
66iMHz |
pins 2 & 3 closed |
pins 1 & 2 closed |