FOCUS INFORMATION SYSTEMS, INC.
486IU
|
Processor |
80486SX/80487SX/80486DX |
|
Processor Speed |
25/33/40/50MHz |
|
Chip Set |
UMC |
|
Max. Onboard DRAM |
64MB |
|
Cache |
64/128/256/512/1024KB |
|
BIOS |
AMI/MR |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J2 |
Power LED & keylock |
J9 |
|
Turbo switch |
J7 |
Turbo LED |
W14 |
|
Speaker |
J8 |
Reset switch |
W15 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
| » |
CMOS memory normal operation |
J1 |
pins 2 & 3 closed |
|
CMOS memory clear |
J1 |
pins 1 & 2 closed | |
| » |
Monitor type select color |
W1 |
Closed |
|
Monitor type select monochrome |
W1 |
Open | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(4) 256K x 9 |
NONE |
NONE |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
NONE |
NONE |
|
3MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
NONE |
|
4MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
NONE |
NONE |
|
5MB |
(4) 256K x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
6MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
NONE |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
9MB |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
|
10MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
12MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
|
16MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
NONE |
NONE |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
NONE |
NONE |
|
24MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
NONE |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
NONE |
|
36MB |
(4) 1M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
|
40MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
|
48MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
|
64MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
|
CPU JUMPER CONFIGURATION | ||||
|
CPU |
W3 |
W17 |
W18 |
W19 |
|
80486SX |
Open |
Open |
Open |
pins 2 & 3 closed |
|
80487SX |
Open |
Closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
80486DX |
Open |
Closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
Note:When a 20MHz 80486SX CPU is used, W3 is closed and a 40MHz clock is installed. | ||||
|
CACHE CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
TAG (U25, U34, U35) |
TAG (U36) |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(3) 16K x 4 |
NONE |
|
128KB |
(4) 32K x 8 |
NONE |
(3) 16K x 4 |
NONE |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(3) 16K x 4 |
NONE |
|
512KB |
(4) 128K x 8 |
NONE |
(3) 64K x 4 |
(1) 64K x 4 |
|
1024KB |
(4) 128K x 8 |
(4) 128K x 8 |
(3) 64K x 4 |
(1) 64K x 4 |
|
CACHE JUMPER CONFIGURATION | ||||||||||
|
Size |
W7 |
W8 |
W9 |
W10 |
W12 |
W13 |
W20 |
W21 |
W22 |
W23 |
|
64KB |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
Closed |
1 & 2 |
2 & 3 |
Open |
Open |
|
128KB |
1 & 2 |
1 & 2 |
2 & 3 |
1 & 2 |
1 & 2 |
Closed |
2 & 3 |
1 & 2 |
Open |
Open |
|
256KB |
1 & 2 |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
Closed |
1 & 2 |
2 & 3 |
Open |
Open |
|
512KB |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
Open |
Open |
1 & 2 |
2 & 3 |
1 & 2 |
|
1024KB |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
Open |
1 & 2 |
1 & 2 |
2 & 3 |
|
Note:Pins designated should be in the closed position. | ||||||||||