MITAC INTERNATIONAL CORPORATION
IH4077D
|
Processor |
80486SX/CXM7/80486DX/80486DX2/80486DX4/P23N/P24D/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz |
|
Chip Set |
EFAR |
|
Max. Onboard DRAM |
64MB |
|
Cache |
64/128/256KB |
|
BIOS |
Award |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, serial ports (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
IDE interface |
CN1 |
Turbo switch |
JP45 |
|
Floppy drive interface |
CN2 |
Reset switch |
JP46 |
|
Serial port 2 |
J9 |
Power LED & keylock |
JP49 |
|
Serial port 1 |
J10 |
Speaker |
JP50 |
|
Parallel port |
J11 |
IDE interface LED |
JP51 |
|
External battery |
JP7 |
D/D board connector |
JP200 |
|
Turbo LED |
JP21 |
32-bit VESA local bus slots |
SL1 & SL2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Factory configured - do not alter |
JP1 |
N/A |
|
|
Factory configured - do not alter |
JP2 |
N/A |
|
|
Factory configured - do not alter |
JP3 |
N/A |
|
|
CMOS memory normal operation |
JP4 |
pins 2 & 3 closed |
|
CMOS memory clear |
JP4 |
pins 1 & 2 closed | |
|
|
Factory configured - do not alter |
JP5 |
N/A |
|
|
Factory configured - do not alter |
JP6 |
N/A |
|
|
Parallel port IRQ select IRQ7 |
JP13 |
pins 2 & 3 closed |
|
Parallel port IRQ select IRQ5 |
JP13 |
pins 1 & 2 closed | |
|
|
Factory configured - do not alter |
JP14 |
N/A |
|
|
Factory configured - do not alter |
JP15 |
N/A |
|
|
Factory configured - do not alter |
JP17 |
N/A |
|
|
Factory configured - do not alter |
JP23 |
N/A |
|
|
Factory configured - do not alter |
JP33 |
N/A |
|
|
Factory configured - do not alter |
JP48 |
N/A |
|
|
BIOS type select normal |
JP130 |
pins 1 & 2 closed |
|
BIOS type select flash |
JP130 |
pins 2 & 3 closed | |
|
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 |
|
2MB |
(1) 512K x 36 |
NONE |
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) 512K x 36 |
NONE |
(1) 512K x 36 |
NONE |
|
4MB |
(1) 1M x 36 |
NONE |
NONE |
NONE |
|
5MB |
(1) 256K x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
6MB |
(1) 512K x 36 |
NONE |
(1) 1M x 36 |
NONE |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
8MB |
(1) 2M x 36 |
NONE |
NONE |
NONE |
|
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) 2M x 36 |
NONE |
(1) 2M x 36 |
NONE |
|
16MB |
(1) 4M x 36 |
NONE |
NONE |
NONE |
|
20MB |
(1) 1M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
32MB |
(1) 8M x 36 |
NONE |
NONE |
NONE |
|
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 |
|
64MB |
(1) 8M x 36 |
NONE |
(1) 8M x 36 |
NONE |
|
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 |
|
Note: The orientation of the banks is unidentified. Bank 0 = U23, 25, 27, & 29. Bank 1 = U24, 26, 28, & 30. | |||
|
CACHE JUMPER CONFIGURATION | |||||
|
Size |
JP8 |
JP9 |
JP10 |
JP11 |
JP12 |
|
64KB |
Open |
Open |
Open |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
128KB |
Closed |
Closed |
Open |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
256KB |
Closed |
Closed |
Closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
CPU TYPE CONFIGURATION | ||||||
|
Type |
JP16 |
JP18 |
JP24 |
JP27 |
JP28 |
JP29 |
|
80486SX |
Closed |
Open |
Open |
Open |
Closed |
Open |
|
CX M7 |
Open |
Closed |
Closed |
Closed |
Open |
Closed |
|
80486DX |
Closed |
Open |
Open |
Open |
Closed |
Open |
|
80486DX2 |
Closed |
Open |
Open |
Open |
Closed |
Open |
|
80486DX4 |
Closed |
Open |
Open |
Open |
Closed |
Open |
|
P23N |
Closed |
Open |
Open |
Open |
Closed |
Open |
|
P24D |
Open |
Closed |
Closed |
Open |
Closed |
Open |
|
P24T |
Open |
Closed |
Closed |
Open |
Closed |
Open |
|
CPU TYPE CONFIGURATION (CONT) | ||||||
|
Type |
JP34 |
JP35 |
JP38 |
JP39 |
JP40 |
JP41 |
|
80486SX |
Closed |
Closed |
Closed |
Open |
Open |
2 & 3 |
|
CX M7 |
Open |
Open |
Open |
Closed |
2 & 3 |
1 & 2 |
|
80486DX |
Closed |
Closed |
Closed |
Closed |
2 & 3 |
1 & 2 |
|
80486DX2 |
Closed |
Closed |
Closed |
Closed |
2 & 3 |
1 & 2 |
|
80486DX4 |
Closed |
Closed |
Closed |
Closed |
2 & 3 |
1 & 2 |
|
P23N |
Closed |
Closed |
Closed |
Closed |
1 & 2 |
1 & 2 |
|
P24D |
Open |
Open |
Open |
Closed |
2 & 3 |
1 & 2 |
|
P24T |
Open |
Open |
Open |
Closed |
1 & 2 |
1 & 2 |
|
Note: Pins designated should be in the closed position. | ||||||
|
CPU TYPE CONFIGURATION (CONT) | |||||
|
Type |
JP42 |
JP43 |
JP44 |
JP47 |
JP110 |
|
80486SX |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
Open |
|
CX M7 |
1 & 2 |
1 & 2 |
1 & 2 |
Closed |
Closed |
|
80486DX |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
Open |
|
80486DX2 |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
Open |
|
80486DX4 |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
Open |
|
P23N |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
Open |
|
P24D |
2 & 3 |
2 & 3 |
2 & 3 |
Closed |
Open |
|
P24T |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
Open |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU TYPE CONFIGURATION (CX M7 ONLY) | |
|
Type |
JP25 |
|
CX486DX |
Open |
|
CX486DX2 |
Closed |
|
CPU SPEED CONFIGURATION | |||
|
Speed |
JP30 |
JP31 |
JP32 |
|
25MHz |
Closed |
Open |
Open |
|
33MHz |
Closed |
Closed |
Closed |
|
40MHZ |
Closed |
Closed |
Open |
|
50iMHz |
Closed |
Open |
Open |
|
50MHz |
Open |
Open |
Closed |
|
66iMHz |
Closed |
Closed |
Closed |
|
75iMHz |
Closed |
Open |
Open |
|
100iMHz |
Closed |
Closed |
Closed |
|
CPU SPEED CONFIGURATION (80486DX4 ONLY) | ||
|
Speed |
JP22 |
JP26 |
|
1x |
N/A |
Open |
|
2x |
Closed |
N/A |
|
2.5x |
N/A |
N/A |
|
3x |
Open |
Closed |
|
VESA WAIT STATE CONFIGURATION | |
|
Wait states |
JP37 |
|
0 wait states |
pins 1 & 2 closed |
|
1 wait state |
pins 2 & 3 closed |
|
BUS SPEED CONFIGURATION | |
|
CPU speed |
JP36 |
|
<= 33MHz |
pins 1 & 2 closed |
|
> 33MHz |
pins 2 & 3 closed |