ENPC TECHNOLOGY CORPORATION
EP-KB21 (REV. 1.2)
| Device Type | Mainboard |
| Processor | Pentium II |
| Processor Speed | 233/266/300/333/350/400/450/500MHz |
| Chip Set | Intel 440BX |
| Maximum Onboard Memory | 384MB (EDO & SDRAM supported) |
| Cache | 256/512KB (located on the Pentium II CPU) |
| BIOS | Award |
| Dimensions | 305mm x 190mm |
| I/O Options | 32-bit PCI slots (4), floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), IR connectors (2), USB ports (2), ATX power connector, AGP slot |
CONNECTIONS |
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| Purpose | Location |
Purpose | Location |
| AGP slot | AGP |
CPU fan power | CN10 |
| ATX power connector | ATX |
Chassis fan power | CN11 |
| PS/2 mouse port | CN1 | IR 1 connector | IR1 |
| USB port 1 | CN2 | IR 2 connector | IR2 |
| USB port 2 | CN3 | Reset switch | J4/Pins 1 & 3 |
| Parallel port | CN4 | Power LED & keylock | J4/Pins 4, 6, 8, 10 & 12 |
| Serial port 2 | CN5 | Power switch | J4/Pins 9 & 11 |
| Serial port 1 | CN6 | Turbo LED | J4/Pins 13 & 15 |
| IDE interface 1 | CN7 | IDE interface LED | J4/Pins 17 & 19 |
| IDE interface 2 | CN8 | Speaker | J4/Pins 14, 16, 18 & 20 |
| Floppy drive interface | CN9 | 32-bit PCI slots | PC1 - PC4 |
USER CONFIGURABLE SETTINGS |
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Function |
Label |
Position |
|
» |
CMOS memory normal operation | JP2 | Pins 1 & 2 closed |
| CMOS memory clear | JP2 | Pins 2 & 3 closed | |
DIMM CONFIGURATION |
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Size |
Bank 0 |
Bank 1 |
Bank 2 |
8MB |
(1) 1M x 64 |
None |
None |
16MB |
(1) 1M x 64 |
(1) 1M x 64 |
None |
16MB |
(1) 2M x 64 |
None |
None |
24MB |
(1) 1M x 64 |
(1) 1M x 64 |
(1) 1M x 64 |
32MB |
(1) 2M x 64 |
(1) 2M x 64 |
None |
32MB |
(1) 4M x 64 |
None |
None |
32MB |
(1) 2M x 64 |
(1) 1M x 64 |
(1) 1M x 64 |
48MB |
(1) 2M x 64 |
(1) 2M x 64 |
(1) 2M x 64 |
48MB |
(1) 4M x 64 |
(1) 1M x 64 |
(1) 1M x 64 |
64MB |
(1) 4M x 64 |
(1) 4M x 64 |
None |
64MB |
(1) 8M x 64 |
None |
None |
64MB |
(1) 4M x 64 |
(1) 2M x 64 |
(1) 2M x 64 |
80MB |
(1) 8M x 64 |
(1) 1M x 64 |
(1) 1M x 64 |
96MB |
(1) 4M x 64 |
(1) 4M x 64 |
(1) 4M x 64 |
96MB |
(1) 8M x 64 |
(1) 2M x 64 |
(1) 2M x 64 |
128MB |
(1) 8M x 64 |
(1) 8M x 64 |
None |
128MB |
(1) 16M x 64 |
None |
None |
128MB |
(1) 8M x 64 |
(1) 4M x 64 |
(1) 4M x 64 |
144MB |
(1) 16M x 64 |
(1) 1M x 64 |
(1) 1M x 64 |
160MB |
(1) 16M x 64 |
(1) 2M x 64 |
(1) 2M x 64 |
192MB |
(1) 8M x 64 |
(1) 8M x 64 |
(1) 8M x 64 |
192MB |
(1) 16M x 64 |
(1) 4M x 64 |
(1) 4M x 64 |
256MB |
(1) 16M x 64 |
(1) 16M x 64 |
None |
256MB |
(1) 16M x 64 |
(1) 8M x 64 |
(1) 8M x 64 |
384MB |
(1) 16M x 64 |
(1) 16M x 64 |
(1) 16M x 64 |
| Note: Board supports EDO & SDRAM memory. | |||
CACHE CONFIGURATION |
| Note: 256KB/512KB cache is located on the Pentium II CPUs. |
CPU MULTIPLIER SELECTION |
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Multiplier |
J3/Pins 1 & 2 | J3/Pins 3 & 4 | J3/Pins 5 & 6 | J3/Pins 7 & 8 |
| 4x | Closed | Open | Closed | Closed |
3.5x |
Closed | Open | Open | Closed |
4x |
Open | Closed | Closed | Closed |
4.5x |
Open | Closed | Open | Closed |
5x |
Open | Open | Closed | Closed |
| 5.5x | Open | Open | Open | Closed |
EXTERNAL CLOCK SPEED DELECTION |
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Speed |
J3/Pins 9 & 10 | J3/Pins 11 & 12 | J3/Pins 13 & 14 |
66MHz |
Open | Open | Open |
75MHz |
Closed | Open | Closed |
83MHz |
Closed | Closed | Open |
100MHz |
Closed | Open | Open |