PACKARD BELL
PB400/401T
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
16/20/25/33/50(internal)/66(internal)MHz |
|
Chip Set |
OPTI |
|
Max. onboard DRAM |
6MB (82C495 AT U77) OR 18MB (82C495B1 AT U77) |
|
Cache |
64/128/256KB |
|
BIOS |
Phoenix |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
Fax/modem daughterboard, floppy drive interface, game port, IDE interface, multi-function connector (IDE interface LED, keylock, reset, SW_MODLR, Turbo LED), parallel port, PS/2 keyboard port, PS/2 mouse port, serial port, VGA feature connector, VGA port |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
PS/2 keyboard |
J1 |
Keyboard lock |
J19 |
|
PS/2 mouse |
J2 |
Fax/modem daughterboard |
J21 |
|
VGA port |
J3 |
IDE interface |
J25 |
|
Game port |
J4 |
Floppy drive interface |
J27 |
|
Parallel port |
J5 |
External speaker connector |
J28 |
|
Serial port B |
J6 |
Multi-function connector |
J32 |
|
External battery |
J7 |
CPU/chassis fan power (+12VDC) |
J33 |
|
VGA feature connector |
J13 |
Riser card |
S1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
| » |
Internal battery enabled |
J8 |
Closed |
|
Internal battery disabled |
J8 |
Open | |
| » |
Onboard Game port enabled |
J12 |
pins 2 & 3 closed |
|
Onboard Game port disabled |
J12 |
pins 1 & 2 closed | |
| » |
Monitor type select color |
J16 |
Closed |
|
Monitor type select monochrome |
J16 |
Open | |
| » |
PS/2 mouse port enabled |
J17 |
Closed |
|
PS/2 mouse port disabled |
J17 |
Open | |
| » |
Onboard IDE interface enabled |
J24 |
pins 1 & 2 closed |
|
Onboard IDE interface disabled |
J24 |
pins 2 & 3 closed | |
| » |
Onboard floppy drive interface enabled |
J26 |
pins 1 & 2 closed |
|
Onboard floppy drive interface disabled |
J26 |
pins 2 & 3 closed | |
| » |
Onboard speaker enabled |
J29 |
pins 1 & 2 closed |
|
Onboard speaker disabled |
J29 |
pins 2 & 3 closed | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
U77 |
|
2MB |
(8) 41256 |
(8) 41256 |
NONE |
Either |
|
6MB |
(8) 41256 |
(8) 41256 |
(4) 1M x 9 |
Either |
|
18MB |
(8) 41256 |
(8) 41256 |
(4) 4M x 9 |
82C495B1 ONLY |
|
Note:256K x 9 SIMMs are not supported. 18MB configuration requires OPTI 82C495B1 DRAM controller. Banks 0 and 1 are soldered to the board and should not be altered. | ||||
|
VIDEO CONFIGURATION | ||
|
Mode |
J10 |
J14 |
|
VGA port (J3) |
pins 1 & 2 closed |
Closed |
|
VGA feature connector (J13) |
pins 1 & 2 closed |
Open |
|
Disabled |
pins 2 & 3 closed |
N/A |
|
VRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
512KB |
(4) 44256 |
NONE |
|
1024KB |
(4) 44256 |
(4) 44256 |
|
Note:If Bank 1 sockets are omitted from board, board was factory installed with 1MB of VRAM. Bank 0 is soldered to the board and should not be altered. | ||
|
SERIAL PORT CONFIGURATION | |||||
|
Modem (J21) |
Port B (J5) |
ISA Modem |
J18 |
J20 |
J101/JMOD * |
|
Disabled |
COM2 |
None |
N/A |
pins 1 & 2 |
Closed |
|
Disabled |
COM2 |
COM1 |
pins 2 & 3 |
pins 1 & 2 |
Closed |
|
Disabled |
COM2 |
COM3 |
pins 1 & 2 |
pins 1 & 2 |
Closed |
|
COM1 |
COM2 |
None |
pins 1 & 2 |
pins 1 & 2 |
Open |
|
COM3 |
COM2 |
None |
pins 2 & 3 |
pins 1 & 2 |
Open |
|
Disabled |
COM4 |
None |
N/A |
pins 2 & 3 |
Closed |
|
Disabled |
COM4 |
COM1 |
pins 2 & 3 |
pins 2 & 3 |
Closed |
|
Disabled |
COM4 |
COM3 |
pins 1 & 2 |
pins 2 & 3 |
Closed |
|
COM1 |
COM4 |
None |
pins 1 & 2 |
pins 2 & 3 |
Open |
|
COM3 |
COM4 |
None |
pins 2 & 3 |
pins 2 & 3 |
Open |
|
Note:* JMOD is a special block placed on J21, connecting pins 10 and 11 together diagonally.
| |||||
|
PARALLEL PORT CONFIGURATION | ||||
|
LPT |
IRQ |
J22 |
J23 | |
| » |
LPT1 |
IRQ7 |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
LPT1 |
IRQ5 |
pins 1 & 2 closed |
pins 2 & 3 closed | |
|
LPT2 |
IRQ7 |
pins 2 & 3 closed |
pins 1 & 2 closed | |
|
LPT2 |
IRQ5 |
pins 2 & 3 closed |
pins 2 & 3 closed | |
|
CPU TYPE CONFIGURATION | |||||||
|
CPU |
J30/1 & 2 |
J30/3 & 4 |
J30/5 & 6 |
J30/7 & 8 |
J30/9&10 |
J31 |
J34 |
|
80486SX |
Open |
Closed |
Open |
Open |
Open |
Open |
Open |
|
80487SX |
Closed |
Open |
Closed |
Open |
Closed |
Open |
Open |
|
80486DX |
Closed |
Open |
Closed |
Closed |
Open |
Open |
Open |
|
ODP486SX |
Closed |
Open |
Closed |
Closed |
Open |
Closed |
Closed |
|
80486DX2 |
Closed |
Open |
Closed |
Closed |
Open |
Open |
Closed |
|
CPU SPEED CONFIGURATION | ||
|
Speed |
J35/pins 1 & 2 |
J35/pins 3 & 4 |
|
16MHz |
Closed |
Closed |
|
20MHz |
Open |
Closed |
|
25MHz |
Closed |
Open |
|
33MHz |
Open |
Open |
|
CACHE CONFIGURATION | ||||
|
Size |
Cache |
Location |
TAG (U81) |
Dirty Bit (U84) |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |
(1) 64K x 1 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 32K x 8 |
(1) 64K x 1 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |
(1) 64K x 1 |
|
CACHE JUMPER CONFIGURATION | ||||||
|
Size |
J36/1 & 2 |
J36/3 & 4 |
J36/5 & 6 |
J36/7 & 8 |
J36/9 & 10 | |
| » |
Disabled |
Open |
Open |
Open |
Open |
Open |
|
64KB |
Open |
Open |
Open |
Open |
Open | |
|
128KB |
Closed |
Open |
Closed |
Closed |
Open | |
|
256KB |
Closed |
Closed |
Closed |
Open |
Closed | |