MYLEX CORPORATION
MGI 486
|
Processor |
80486SX/80486SX2/UMCU5/CX486DX/AM486DX/AM486DXL/80486DX/ CX486DX2/ AM486DX2/AM486DXL2/80486DX2/80486DX4/P24D/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz |
|
Chip Set |
SIS |
|
Max. Onboard DRAM |
64MB |
|
Cache |
64/128/256/512KB |
|
BIOS |
Award |
|
Dimensions |
250mm x 220mm |
|
I/O Options |
32-bit VESA local bus slots (3), green PC connector |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Green PC connector |
D4 |
Reset switch |
J5 |
|
Green PC connector |
J1 |
Turbo switch |
J6 |
|
Power LED & keylock |
J2 |
Turbo LED |
J7 |
|
Speaker |
J3 |
Green PC connector |
JP13 |
|
External battery |
J4 |
32-bit VESA local bus slots |
SL1 - SL3 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
CMOS memory normal operation |
JP11 |
pins 1 & 2 closed |
|
CMOS memory clear |
JP11 |
pins 2 & 3 closed | |
|
|
Factory configured - do not alter |
RP1 |
N/A |
|
DRAM CONFIGURATION (OPTION 1) | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
1MB |
(4) 256K x 9 |
NONE |
NONE |
|
4MB |
(4) 1M x 9 |
NONE |
NONE |
|
16MB |
(4) 4M x 9 |
NONE |
NONE |
|
64MB |
(4) 16M x 9 |
NONE |
NONE |
|
DRAM CONFIGURATION (OPTION 2) | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
1MB |
NONE |
(1) 256K x 36 |
NONE |
|
2MB |
NONE |
(1) 256K x 36 |
(1) 256K x 36 |
|
4MB |
NONE |
(1) 1M x 36 |
NONE |
|
5MB |
NONE |
(1) 256K x 36 |
(1) 1M x 36 |
|
8MB |
NONE |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
NONE |
(1) 4M x 36 |
NONE |
|
20MB |
NONE |
(1) 1M x 36 |
(1) 4M x 36 |
|
32MB |
NONE |
(1) 4M x 36 |
(1) 4M x 36 |
|
DRAM CONFIGURATION (OPTION 3) | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
2MB |
NONE |
(1) 512K x 36 |
NONE |
|
8MB |
NONE |
(1) 2M x 36 |
NONE |
|
10MB |
NONE |
(1) 512K x 36 |
(1) 2M x 36 |
|
16MB |
NONE |
(1) 2M x 36 |
(1) 2M x 36 |
|
32MB |
NONE |
(1) 8M x 36 |
NONE |
|
40MB |
NONE |
(1) 2M x 36 |
(1) 8M x 36 |
|
64MB |
NONE |
(1) 8M x 36 |
(1) 8M x 36 |
|
DRAM CONFIGURATION (OPTION 4) | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
2MB |
(4) 256K x 9 |
(1) 256K x 36 |
NONE |
|
5MB |
(4) 256K x 9 |
(1) 1M x 36 |
NONE |
|
6MB |
(4) 256K x 9 |
(1) 256K x 36 |
(1) 1M x 36 |
|
8MB |
(4) 1M x 9 |
(1) 1M x 36 |
NONE |
|
12MB |
(4) 1M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
18MB |
(4) 256K x 9 |
(1) 256K x 36 |
(1) 4M x 36 |
|
20MB |
(4) 1M x 9 |
(1) 4M x 36 |
NONE |
|
24MB |
(4) 1M x 9 |
(1) 1M x 36 |
(1) 4M x 36 |
|
32MB |
(4) 4M x 9 |
(1) 4M x 36 |
NONE |
|
36MB |
(4) 1M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
|
48MB |
(4) 4M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
|
DRAM CONFIGURATION (OPTION 5) | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
12MB |
(4) 1M x 9 |
(1) 2M x 36 |
NONE |
|
16MB |
(4) 1M x 9 |
(1) 2M x 36 |
(1) 1M x 36 |
|
36MB |
(4) 1M x 9 |
(1) 8M x 36 |
NONE |
|
48MB |
(4) 4M x 9 |
(1) 8M x 36 |
NONE |
|
64MB |
(4) 4M x 9 |
(1) 8M x 36 |
(1) 4M x 36 |
|
DRAM RESISTOR CONFIGURATION | ||||
|
Setting |
RP7 |
RP8 |
RP9 |
RP10 |
|
Option 1 |
Not installed |
Not installed |
Not installed |
Installed |
|
Option 2 |
Not installed |
Installed |
Not installed |
Not installed |
|
Option 3 |
Installed |
Not installed |
Not installed |
Not installed |
|
Option 4 |
Not installed |
Not installed |
Not installed |
Installed |
|
Option 5 |
Not installed |
Not installed |
Installed |
Not installed |
|
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) 16K x 8 or (1) 32K x 8 |
|
256KB |
(4) 64K x 8 |
NONE |
(1) 16K x 8 or (1) 32K x 8 |
|
512KB |
(4) 64K x 8 |
(4) 64K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | ||
|
Size |
JP9 |
JP20 |
|
64KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
128KB |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
256KB |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
256KB |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
512KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
CACHE RESISTOR CONFIGURATION | |||||
|
Size |
RP15 |
RP16 |
RP17 |
RP18 |
RP19 |
|
64KB |
Installed |
Not installed |
Not installed |
Not installed |
Not installed |
|
128KB |
Not installed |
Installed |
Not installed |
Not installed |
Not installed |
|
256KB |
Not installed |
Not installed |
Installed |
Not installed |
Not installed |
|
256KB |
Not installed |
Not installed |
Not installed |
Installed |
Not installed |
|
512KB |
Not installed |
Not installed |
Not installed |
Not installed |
Installed |
|
CPU TYPE CONFIGURATION | |||||
|
Type |
JP3 |
JP17 |
JP18 |
JP21 |
JP23 |
|
80486SX |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
|
80486SX2 |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
|
UMCU5 |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
|
CX486DX |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
|
80486DX |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
|
80486DX2 |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
|
80486DX4 |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
|
P24D |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
|
P24T |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
2 & 3 |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU TYPE CONFIGURATION (CONT) | ||||||
|
Type |
RP3 |
RP4 |
RP5 |
RP6 |
RP30 |
RP31 |
|
80486SX |
Not installed |
Not installed |
Installed |
Not installed |
Not installed |
Installed |
|
80486SX2 |
Not installed |
Not installed |
Installed |
Not installed |
Not installed |
Installed |
|
UMCU5 |
Not installed |
Not installed |
Installed |
Not installed |
Not installed |
Installed |
|
CX486DX |
Installed |
Not installed |
Not installed |
Not installed |
Installed |
Not installed |
|
80486DX |
Installed |
Not installed |
Not installed |
Not installed |
Not installed |
Installed |
|
80486DX2 |
Installed |
Not installed |
Not installed |
Not installed |
Not installed |
Installed |
|
80486DX4 |
Installed |
Not installed |
Not installed |
Not installed |
Not installed |
Installed |
|
P24D |
Not installed |
Installed |
Not installed |
Installed |
Not installed |
Not installed |
|
P24T |
Installed |
Not installed |
Not installed |
Not installed |
Not installed |
Installed |
|
CPU SPEED CONFIGURATION (MX8315/UM9515 CLOCK) | |||
|
Speed |
JP5 |
JP6 |
JP7 |
|
25MHz |
Open |
Open |
Closed |
|
33MHz |
Closed |
Closed |
Closed |
|
40MHz |
Open |
Closed |
Closed |
|
50iMHz |
Open |
Open |
Closed |
|
50MHz |
Closed |
Open |
Open |
|
66iMHz |
Closed |
Closed |
Closed |
|
75iMHz |
Open |
Open |
Closed |
|
100iMHz |
Closed |
Closed |
Closed |
|
CPU SPEED CONFIGURATION (IMI SC466 CLOCK) | |||
|
Speed |
JP5 |
JP6 |
JP7 |
|
25MHz |
Open |
Open |
Open |
|
33MHz |
Closed |
Closed |
Open |
|
40MHz |
Open |
Closed |
Open |
|
50iMHz |
Open |
Open |
Open |
|
50MHz |
Closed |
Open |
Open |
|
66iMHz |
Closed |
Closed |
Open |
|
75iMHz |
Open |
Open |
Open |
|
100iMHz |
Closed |
Closed |
Open |
|
CPU CORE FREQUENCY CONFIGURATION | ||
|
CPU |
JP22 |
JP27 |
|
Cyrix |
pins 1 & 2 closed |
Open |
|
AMD486DX2 |
Open |
Closed |
|
Intel 80486DX (3x) |
Open |
Open |
|
AMD486DX4 |
Open |
Open |
|
Intel 80486DX4 (2x) |
pins 2 & 3 closed |
Open |
|
CPU VOLTAGE CONFIGURATION | ||||
|
Voltage |
JP1 |
JP2 |
JP4 |
JP24 |
|
3.3v |
Open |
Open |
Open |
pins 1 & 2 closed |
|
4.0v |
Open |
Open |
Open |
pins 2 & 3 closed |
|
5.0v |
Closed |
Closed |
Closed |
Open |
|
VESA WAIT STATE CONFIGURATION | |
|
Wait states |
JP15 |
|
0 wait states |
pins 1 & 2 closed |
|
1 wait state |
pins 2 & 3 closed |
|
BUS SPEED CONFIGURATION | |
|
CPU speed |
JP16 |
|
<= 33MHz |
pins 1 & 2 closed |
|
> 33MHz |
pins 2 & 3 closed |