UNIDENTIFIED
MS-4123 VERSION 3.0
|
Processor |
80486SX/80487SX/80486DX/80486DX2/80486DX4/Pentium Overdrive |
|
Processor Speed |
20/25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
Contaq |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
254mm 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 6 - 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 |
JP1 |
Open |
|
Monitor type select color |
JP1 |
Closed | |
|
|
Factory configured - do not alter |
JP8 |
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 |
|
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) 256K x 9 |
(4) 4M x 9 |
|
17MB |
(4) 4M x 9 |
(4) 256K 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 |
JP2 |
|
64KB |
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11 closed |
|
128KB |
pins 1 & 2, 4 & 5, 8 & 9, 11 & 12 closed |
|
256KB |
pins 2 & 3, 5 & 6, 8 & 9, 11 & 12 closed |
|
CPU TYPE CONFIGURATION | |
|
Type |
JP6 |
|
80486SX |
pins 2 & 5, 3 & 6, 8 & 11, 9 & 12 closed |
|
80487SX |
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11 closed |
|
80486DX |
pins 1 & 2, 4 & 5, 8 & 9, 11 & 12 closed |
|
80486DX2 |
pins 1 & 2, 4 & 5, 8 & 9, 11 & 12 closed |
|
Pentium Overdrive |
pins 1 & 2, 4 & 5, 8 & 9, 11 & 12 closed |
|
CPU SPEED CONFIGURATION | |||
|
Speed |
JP3 |
JP5 |
JP7 |
|
20MHz |
pins 2 & 3 closed |
pins 1 & 2, 5 & 6 closed |
pins 2 & 3 closed |
|
25MHz |
pins 2 & 3 closed |
pins 5 & 6 closed |
pins 2 & 3 closed |
|
33MHz |
pins 1 & 2 closed |
pins 1 & 2, 3 & 4 closed |
pins 2 & 3 closed |
|
40MHz |
pins 1 & 2 closed |
pins 1 & 2, 5 & 6 closed |
pins 1 & 2 closed |
|
50iMHz |
pins 2 & 3 closed |
pins 5 & 6 closed |
pins 2 & 3 closed |
|
50MHz |
pins 1 & 2 closed |
pins 5 & 6 closed |
pins 1 & 2 closed |
|
66iMHz |
pins 1 & 2 closed |
pins 1 & 2, 3 & 4 closed |
pins 2 & 3 closed |
|
BUS SPEED CONFIGURATION | |
|
CPU speed |
JP13 |
|
<= 33MHz |
Open |
|
> 33MHz |
Closed |