IBM CORPORATION
PC 330-486, PC 350-486
|
Processor |
80486SX/486 Overdrive/80486DX/80486DX2/80486DX4/P24T |
|
Processor Speed |
20/25/33/40/50(internal)/50/66(internal)/75(internal)/ 100(internal)MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
128MB |
|
Maximum Video Memory |
Unidentified |
|
Cache |
128/256KB |
|
BIOS |
Unidentified |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA/PCI local bus slot, floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2),VESA feature connector, VGA port, riser slot, VRM connector |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED |
CN1 |
IDE interface 2 |
J10 |
|
IDE interface LED |
CN2 |
VESA feature connector |
J14 |
|
PS/2 mouse port |
J2 |
Speaker |
J27 |
|
Serial port 1 |
J3 |
On/off switch connector |
J29 |
|
Serial port 2 |
J4 |
On/off switch power supply connector |
J30 |
|
Parallel port |
J5 |
Riser slot |
SL1 |
|
VGA port |
J6 |
32-bit VESA/PCI local bus slot |
SL2 |
|
Floppy drive interface |
J7 |
VRM connector |
VRM |
|
IDE interface 1 |
J9 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
» |
Flash BIOS write protect disabled |
J13 |
Pins 2 & 3 closed |
|
Flash BIOS write protect enabled |
J13 |
Pins 1 & 2 closed | |
|
» |
On board video enabled |
J15 |
Pins 1 & 2 closed |
|
On board video disabled |
J15 |
Pins 2 & 3 closed | |
|
» |
Factory configured - do not alter |
JP2 |
Unidentified |
|
» |
Modem answers on ring |
JP5 |
Pins 2 & 3 closed |
|
Modem does not answer on ring |
JP5 |
Pins 1 & 2 closed | |
|
» |
Factory configured - do not alter |
JP11 |
Unidentified |
|
» |
PS/2 mouse enabled |
JP12 |
Closed |
|
PS/2 mouse disabled |
JP12 |
Open | |
|
» |
CMOS memory normal operation |
JP14 |
Pins 1 & 2 closed |
|
CMOS memory clear |
JP14 |
Pins 2 & 3 closed | |
|
» |
VGA IRQ9 enabled |
JP15 |
Closed |
|
VGA IRQ9 disabled |
JP15 |
Open | |
|
» |
Floppy drive write protect disabled |
WP |
Open |
|
Floppy drive write protect enabled |
WP |
Closed | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
4MB |
(1) 1M x 32 |
None |
None |
None |
|
8MB |
(1) 1M x 32 |
(1) 1M x 32 |
None |
None |
|
8MB |
(1) 2M x 32 |
None |
None |
None |
|
12MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
None |
|
12MB |
(1) 1M x 32 |
(1) 2M x 32 |
None |
None |
|
16MB |
(1) 4M x 32 |
None |
None |
None |
|
16MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 2M x 32 |
None |
|
16MB |
(1) 2M x 32 |
(1) 2M x 32 |
None |
None |
|
16MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
20MB |
(1) 1M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
None |
|
20MB |
(1) 1M x 32 |
(1) 4M x 32 |
None |
None |
|
DRAM CONFIGURATION (CON’T) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
24MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
None |
|
24MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
|
24MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 4M x 32 |
None |
|
28MB |
(1) 1M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
|
28MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 4M x 32 |
(1) 1M x 32 |
|
32MB |
(1) 4M x 32 |
(1) 4M x 32 |
None |
None |
|
32MB |
(1) 8M x 32 |
None |
None |
None |
|
32MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 4M x 32 |
None |
|
32MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
|
36MB |
(1) 1M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
None |
|
40MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 8M x 32 |
None |
|
40MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
|
48MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
None |
|
48MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 8M x 32 |
None |
|
48MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
|
52MB |
(1) 1M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
|
64MB |
(1) 8M x 32 |
(1) 8M x 32 |
None |
None |
|
64MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 8M x 32 |
None |
|
64MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
|
68MB |
(1) 1M x 32 |
(1) 8M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
|
72MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 8M x 32 |
(1) 8M x 32 |
|
80MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 8M x 32 |
(1) 8M x 32 |
|
84MB |
(1) 1M x 32 |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 4M x 32 |
|
96MB |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 8M x 32 |
None |
|
96MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 8M x 32 |
(1) 8M x 32 |
|
100MB |
(1) 1M x 32 |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 8M x 32 |
|
128MB |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 8M x 32 |
|
Note: Board also accepts x 36 SIMMs. | ||||
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
128KB |
(4) 32K x 8 |
None |
(1) 32K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |||
|
Size |
J16 |
J17 |
J38 |
|
128KB |
Pins 2 & 3 closed |
Open |
Open |
|
256KB |
Pins 1 & 2 closed |
Closed |
Open |
|
CPU SPEED SELECTION | |||
|
Speed |
J35 |
J36 |
J37 |
|
20MHz |
Closed |
Open |
Open |
|
25MHz |
Open |
Closed |
Closed |
|
33MHz |
Open |
Closed |
Open |
|
40MHz |
Open |
Open |
Closed |
|
50iMHz |
Open |
Closed |
Closed |
|
50MHz |
Open |
Open |
Open |
|
66iMHz |
Open |
Closed |
Open |
|
75iMHz |
Open |
Closed |
Closed |
|
100iMHz |
Open |
Closed |
Open |
|
CPU TYPE SELECTION | ||
|
Type |
J23 |
J24 |
|
80486SX |
Pins 1 & 2 closed |
Open |
|
486 Overdrive |
Pins 2 & 3 closed |
Open |
|
80486DX |
Pins 2 & 3 closed |
Open |
|
80486DX2 |
Pins 2 & 3 closed |
Open |
|
80486DX4 |
Pins 2 & 3 closed |
Open |
|
P24T |
Pins 2 & 3 closed |
Closed |
|
CPU MULTIPLIER SELECTION (80486DX4 ONLY) | |
|
Multiplier |
JP10 |
|
Other multiplier |
Pins 1 & 2 closed |
|
2x |
Pins 3 & 4 closed |
|
3x |
Open |
|
LOCAL BUS SELECTION ON RISER SLOT | ||||
|
Setting |
JP3 |
JP4 |
JP7 |
JP13 |
|
VESA local bus |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Open |
Closed |
|
PCI local bus |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Closed |
Open |
|
DMA CHANNEL SELECTION | ||
|
Channel |
JP8 |
JP9 |
|
1 |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
3 |
Pins 1 & 2 closed |
Pins 1 & 2 closed |