I-BUS
BARRACUDA
|
Processor |
CX486SX/80486SX/80486SX2/CX486DX/AM486DX/SL80486DX/80486DX/ CX486DX2/AM486DX2/SL80486DX2/80486DX2/80486DX4/P24D/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
128MB |
|
Cache |
64/128/256/512KB |
|
BIOS |
Unidentified |
|
Dimensions |
300mm x 89mm |
|
I/O Options |
Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
IDE interface |
J3 |
Serial port 1 |
J30 |
|
Parallel port |
J4 |
Serial port 2 |
J31 |
|
Speaker |
J6 |
Auxiliary keyboard connector |
J32 |
|
Chassis fan power |
J8 |
Floppy drive interface |
J33 |
|
IDE interface LED |
J25 |
PS/2 mouse interface |
J35 |
|
Reset switch |
J26 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
PCI type select synchronous |
J9 |
pins 2 & 4, 3 & 5 closed | |
|
PCI type select asynchronous |
J9 |
pins 1 & 3, 4 & 6 closed | |
|
|
Primary IDE enabled |
J14 |
pins 1 & 3 closed |
|
Primary IDE disabled |
J14 |
pins 1 & 3 open | |
|
Secondary IDE enabled |
J14 |
pins 3 & 5 closed | |
|
Secondary IDE disabled |
J14 |
pins 3 & 5 open | |
|
|
IDE interface enabled |
J14 |
pins 2 & 4 closed |
|
IDE interface disabled |
J14 |
pins 4 & 6 closed | |
|
|
Floppy drive type select 1.44MB |
J17 |
pins 1 & 2 closed |
|
Floppy drive type select 2.88MB |
J17 |
pins 3 & 4, 5 & 6 closed | |
|
|
CPU clock frequency select 8MHz |
J19 |
pins 1 & 2 closed |
|
CPU clock frequency select 16MHz (DX4 only) |
J19 |
pins 2 & 3 closed | |
|
PCI adapters not installed |
J20 |
pins 1 & 2 closed | |
|
PCI adapters installed |
J20 |
pins 2 & 3 closed | |
|
IDE read prefetch enabled |
J22 |
pins 1 & 2 closed | |
|
IDE read prefetch disabled |
J22 |
pins 2 & 3 closed | |
|
|
Battery type select internal |
J24 |
pins 2 & 3 closed |
|
CMOS memory clear |
J24 |
pins 1 & 2 closed | |
|
|
Mouse IRQ12 enabled |
J27 |
Closed |
|
Mouse IRQ12 disabled |
J27 |
Open | |
|
|
IDE IRQ14 enabled |
J28 |
Closed |
|
IDE IRQ14 disabled |
J28 |
Open | |
|
|
Factory configured - do not alter |
J29 |
N/A |
|
Password enabled |
J36 |
Closed | |
|
Password disabled |
J36 |
Open | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
2MB |
(1) 512K x 36 |
NONE |
NONE |
NONE |
|
4MB |
(1) 512K x 36 |
(1) 512K x 36 |
NONE |
NONE |
|
4MB |
(1) 1M x 36 |
NONE |
NONE |
NONE |
|
8MB |
(1) 2M x 36 |
NONE |
NONE |
NONE |
|
8MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
10MB |
(1) 2M x 36 |
(1) 512K x 36 |
NONE |
NONE |
|
10MB |
(1) 512K x 36 |
(1) 2M x 36 |
NONE |
NONE |
|
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
14MB |
(1) 2M x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
|
16MB |
(1) 4M x 36 |
NONE |
NONE |
NONE |
|
16MB |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
NONE |
|
16MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
18MB |
(1) 4M x 36 |
(1) 512K x 36 |
NONE |
NONE |
|
18MB |
(1) 512K x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
|
20MB |
(1) 4M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
DRAM CONFIGURATION (CONT) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
20MB |
(1) 1M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
22MB |
(1) 4M x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
|
24MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
24MB |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
|
26MB |
(1) 512K x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
28MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
32MB |
(1) 8M x 36 |
NONE |
NONE |
NONE |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
32MB |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
34MB |
(1) 8M x 36 |
(1) 512K x 36 |
NONE |
NONE |
|
34MB |
(1) 512K x 36 |
(1) 8M x 36 |
NONE |
NONE |
|
36MB |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
38MB |
(1) 8M x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
|
40MB |
(1) 8M x 36 |
(1) 2M x 36 |
NONE |
NONE |
|
40MB |
(1) 2M x 36 |
(1) 8M x 36 |
NONE |
NONE |
|
48MB |
(1) 8M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
|
48MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
52MB |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
66MB |
(1) 512K x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
|
72MB |
(1) 2M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
|
96MB |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
|
98MB |
(1) 512K x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
104MB |
(1) 2M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
128MB |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
CACHE CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
|
512KB |
(4) 64K x 8 |
(4) 64K x 8 |
|
Note: Cache is factory installed by the manufacturer and is not configurable. | ||
|
CACHE JUMPER CONFIGURATION | |
|
Size |
J15 |
|
64KB |
Open |
|
128KB |
pins 5 & 6 closed |
|
256KB |
pins 3 & 4, 5 & 6 closed |
|
512KB |
pins 1 & 2, 3 & 4, 5 & 6 closed |
|
CACHE JUMPER CONFIGURATION | |
|
Setting |
J21 |
|
Bank 0 installed |
pins 1 & 2 closed |
|
Banks 0 & 1 installed |
pins 2 & 3 closed |
|
CPU TYPE CONFIGURATION | |
|
Type |
J5 |
|
80486SX |
pins 2 & 3 closed |
|
80486DX |
pins 1 & 2, 3 & 4 closed |
|
CPU TYPE CONFIGURATION | ||
|
Type |
J7 |
J23 |
|
AMD |
Open |
pins 1 & 2 closed |
|
Cyrix |
pins 1 & 2, 3 & 4 closed |
pins 2 & 3 closed |
|
Intel |
Open |
pins 1 & 2 closed |
|
CPU TYPE CONFIGURATION | |
|
Type |
J1 |
|
80486SL-series |
pins 1 & 2, 3 & 4 closed |
|
P24T burst write |
pins 5 & 6 closed |
|
P24T write back |
pins 7 & 8 closed |
|
P24T write through |
Open |
|
CPU TYPE CONFIGURATION | |
|
Type |
J18 |
|
80486SL-series |
pins 2 & 4 closed |
|
Cyrix |
pins 4 & 6 closed |
|
P24D write back |
pins 3 & 5 closed |
|
P24D write through |
pins 1 & 3 closed |
|
CPU TYPE CONFIGURATION | |
|
Type |
J11 |
|
Any CPU type installed except for P24T |
pins 1 & 3 closed |
|
Pentium Overdrive |
pins 3 & 5 closed |
|
Bit 0 to stop clock |
pins 2 & 4 closed |
|
Bit 0 to stop clock |
pins 4 & 6 closed |
|
CPU SPEED CONFIGURATION | ||
|
Speed |
J12 |
J16 |
|
25MHz |
pins 1 & 3, 2 & 4 closed |
pins 5 & 6 closed |
|
33MHz |
pins 1 & 3, 4 & 6 closed |
pins 1 & 2, 5 & 6 closed |
|
40MHz |
pins 2 & 4, 3 & 5 closed |
pins 3 & 4, 5 & 6 closed |
|
50iMHz |
pins 1 & 3, 2 & 4 closed |
pins 5 & 6 closed |
|
50MHz |
pins 4 & 6, 3 & 5 closed |
pins 1 & 2, 3 & 4, 5 & 6 closed |
|
66iMHz |
pins 1 & 3, 4 & 6 closed |
pins 1 & 2, 5 & 6 closed |
|
75iMHz |
pins 1 & 3, 2 & 4 closed |
pins 5 & 6 closed |
|
100iMHz |
pins 1 & 3, 4 & 6 closed |
pins 1 & 2, 5 & 6 closed |
|
CPU SPEED CONFIGURATION (80486DX4) | |
|
Speed |
J10 |
|
2x |
pins 3 & 5 closed |
|
2.5x |
pins 1 & 3 closed |
|
3x |
Open |
|
Cyrix CPU installed |
pins 3 & 4 closed |
|
IDE MODE CONFIGURATION | |
|
Speed |
J13 |
|
>180ns |
pins 1 & 3, 2 & 4 closed |
|
>240ns |
pins 2 & 4, 3 & 5 closed |
|
>383ns |
pins 1 & 3, 4 & 6 closed |
|
>480ns |
pins 3 & 5, 4 & 6 closed |
|
DMA CONFIGURATION | |
|
DMA |
J2 |
|
DMA 1 |
pins 3 & 4, 5 & 6 closed |
|
DMA 3 |
pins 1 & 2, 7 & 8 closed |