COMPAQ COMPUTER CORPORATION
PRESARIO 400 SERIES
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
25/33/50(internal)/66(internal)MHz |
|
Chip Set |
Compaq |
|
Max. Onboard DRAM |
16MB |
|
Cache |
None |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
Riser card, floppy drive interface, game port, IDE interface, parallel port, PS/2 mouse port, serial port |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
PS/2 mouse port |
CN1 |
Power LED & keylock |
J2 |
|
Serial port |
CN2 |
Floppy drive interface |
J3 |
|
Parallel port |
CN3 |
Speaker |
J13 |
|
Game port |
CN4 |
External battery |
J16 |
|
Modem ports |
CN5 |
Riser Card |
SL1 |
|
IDE interface |
J1 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
CPU type select PGA |
P2 |
pins 2 & 3 closed |
|
CPU type select PQFP |
P2 |
pins 1 & 2 closed | |
|
|
CMOS memory normal operation |
P6 |
Open |
|
CMOS memory clear |
P6 |
Closed | |
|
|
Modem ROM select internal |
P7 |
pins 1 & 2 closed |
|
Modem ROM select external |
P7 |
pins 2 & 3 closed | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(1) 256K x 36 |
NONE |
|
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
|
2MB |
(1) 512K x 36 |
NONE |
|
3MB |
(1) 256K x 36 |
(1) 512K x 36 |
|
4MB |
(1) 512K x 36 |
(1) 512K x 36 |
|
4MB |
(1) 1M x 36 |
NONE |
|
5MB |
(1) 256K x 36 |
(1) 1M x 36 |
|
6MB |
(1) 512K x 36 |
(1) 1M x 36 |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
|
8MB |
(1) 2M x 36 |
NONE |
|
9MB |
(1) 256K x 36 |
(1) 2M x 36 |
|
10MB |
(1) 512K x 36 |
(1) 2M x 36 |
|
12MB |
(1) 1M x 36 |
(1) 2M x 36 |
|
16MB |
(1) 2M x 36 |
(1) 2M x 36 |
|
CPU TYPE CONFIGURATION | |||
|
Type |
P3 |
P4 |
P5 |
|
80486SX (PQFP) |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
80486SX (PGA) |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 3 & 4 closed |
|
80487SX |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
ODP486SX |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
80486DX |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
80486DX2 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
CPU SPEED CONFIGURATION | |
|
Speed |
P1 |
|
25MHz |
pins 1 & 2 closed |
|
33MHz |
pins 2 & 3 closed |
|
50iMHz |
pins 1 & 2 closed |
|
66iMHz |
pins 2 & 3 closed |
|
MISCELLANEOUS TECHNICAL NOTE |
|
The purpose of CN6 is unknown. |