COMPUTREND SYSTEMS, INC.
CONTAQ SINGLE CHIP 486 (MS-4125)
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
Contaq |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
260mm x 220mm |
|
I/O Options |
32-bit VESA local bus slots (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Auxiliary keyboard connector |
J2 |
Turbo LED |
J5 pins 12 & 13 |
|
External battery |
J4 |
Turbo switch |
J5 pins 15 - 17 |
|
Power LED & keylock |
J5 pins 1 - 5 |
Reset switch |
J5 pins 19 & 20 |
|
Speaker |
J5 pins 7 - 10 |
32-bit VESA local bus slots |
SL1 & SL2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Battery type select internal |
J4 |
pins 2 & 3 closed |
|
Battery type select external |
J4 |
Closed | |
|
|
Monitor type select monochrome |
JP17 |
Open |
|
Monitor type select color |
JP17 |
Closed | |
|
|
Factory configured - do not alter |
JP23 |
pins 1 & 2 closed |
|
|
Factory configured - do not alter |
JP26 |
pins 1 & 2 closed |
|
|
Factory configured - do not alter |
JP37 |
pins 1 & 2 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 |
|
5MB |
(4) 1M x 9 |
(4) 256K x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
17MB |
(4) 4M x 9 |
(4) 256K x 9 |
|
17MB |
(4) 256K x 9 |
(4) 4M x 9 |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
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) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |||
|
Size |
JP1 |
JP6 |
JP7 |
|
64KB |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
128KB |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
256KB |
pins 4 & 5 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
CPU TYPE CONFIGURATION | |||
|
Type |
JP31 |
JP32 |
JP33 |
|
80486SX (PQFP) |
Open |
Open |
pins 1 & 2 closed |
|
80486SX (PGA) |
pins 3 & 4 closed |
Open |
pins 2 & 3, 4 & 5 closed |
|
ODP486SX |
pins 2 & 3, 4 & 5 closed |
pins 1 & 2 closed |
pins 2 & 3, 4 & 5 closed |
|
80487SX |
pins 2 & 3, 4 & 5 closed |
pins 1 & 2 closed |
pins 2 & 3, 4 & 5 closed |
|
80486DX (PQFP) |
pins 1 & 2 closed |
pins 4 & 5 closed |
pins 1 & 2 closed |
|
80486DX (PGA) |
pins 2 & 3, 4 & 5 closed |
pins 2 & 3 closed |
pins 2 & 3, 4 & 5 closed |
|
80486DX2 |
pins 2 & 3, 4 & 5 closed |
pins 2 & 3 closed |
pins 2 & 3, 4 & 5 closed |
|
Pentium Overdrive |
pins 2 & 3, 4 & 5 closed |
pins 1 & 2 closed |
pins 2 & 3, 4 & 5 closed |
|
CPU SPEED CONFIGURATION | |||
|
Speed |
JP12 |
JP13 |
JP14 |
|
25MHz |
Open |
Open |
Closed |
|
33MHz |
Closed |
Open |
Open |
|
40MHz |
Closed |
Closed |
Open |
|
50iMHz |
Open |
Open |
Closed |
|
50MHz |
Open |
Closed |
Open |
|
66iMHz |
Closed |
Open |
Open |
|
CPU CLOCK SPEED CONFIGURATION | |
|
Speed |
JP8 |
|
20MHz |
pins 2 & 3 closed |
|
25MHz |
pins 2 & 3 closed |
|
33MHz |
pins 1 & 2 closed |
|
VESA WAIT STATE CONFIGURATION | |
|
Wait states |
JP19 |
|
0 wait states |
Open |
|
1 wait state |
Closed |
|
BUS SPEED CONFIGURATION | |
|
CPU speed |
JP20 |
|
<= 33MHz |
Open |
|
> 33MHz |
Closed |
|
VESA CARD CONFIGURATION | ||
|
Type |
JP18 |
JP22 |
|
Normal card installed |
Closed |
pins 1 & 2 closed |
|
Weitek P9000 only |
Open |
pins 2 & 3 closed |