INFOMATIC POWER SYSTEMS CORPORATION
OPTI-495SX 3/486WB CACHE
|
Processor |
80386DX/80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
32-bit VESA local bus slot (Non-functional) |
|
NPU Options |
80387 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J1 |
Reset switch |
J5 |
|
Speaker |
J2 |
External battery |
JP18 |
|
Turbo switch |
J3 |
32-bit VESA card |
S1 |
|
Turbo LED |
J4 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Factory configured - do not alter |
JP8 |
unknown | |
|
Factory configured - do not alter |
JP9 |
unknown | |
|
Factory configured - do not alter |
JP10 |
unknown | |
|
Factory configured - do not alter |
JP11 |
unknown | |
|
Monitor type select color |
JP17 |
closed | |
|
Monitor type select monochrome |
JP17 |
open | |
|
CMOS memory normal operation |
JP18 |
pins 2 & 3 closed | |
|
CMOS memory clear |
JP18 |
pins 3 & 4 closed | |
|
External battery select |
JP18 |
connected | |
|
Factory configured - do not alter |
JP23 |
open | |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
JP6 |
JP7 |
JP12 |
JP13 |
|
64KB |
open |
open |
open |
pins 2 & 3 closed |
|
128KB |
open |
closed |
closed |
pins 1 & 2 closed |
|
256KB |
closed |
closed |
closed |
pins 2 & 3 closed |
|
CACHE CONFIGURATION | |||
|
Size |
Cache |
Location |
TAG |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 8K x 8 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(4) 256K x 9 |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
|
5MB |
(4) 256K x 9 |
(4) 1 x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CPU MODE CONFIGURATION | |||||
|
Mode |
JP3 |
JP5 |
JP20 |
JP21 |
JP24 |
|
486 (PQFP) |
pins 1 & 2 |
pins 2 & 3 |
open |
N/A |
pins 2 & 3 |
|
486 (PGA) |
pins 1 & 2 |
pins 2 & 3 |
closed |
closed |
pins 2 & 3 |
|
386 (PQFP) |
pins 2 & 3 |
pins 1 & 2 |
N/A |
open |
pins 1 & 2 |
|
CPU TYPE CONFIGURATION (PQFP) | ||||
|
Type |
JP14 |
JP22 |
JP51 |
JP52 |
|
80486SX-33MHz |
pins 1 & 2 closed |
N/A |
open |
closed |
|
80486SX-25MHz |
pins 1 & 2 closed |
N/A |
closed |
open |
|
80386DX-40MHz |
pins 2 & 3 closed |
open |
open |
open |
|
80386DX-33MHz |
pins 2 & 3 closed |
closed |
open |
closed |
|
CPU TYPE CONFIGURATION (PGA) | ||||||
|
Type |
JP1 |
JP2 |
JP4 |
JP14 |
JP51 |
JP52 |
|
80486DX2-66MHz |
closed |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
open |
closed |
|
80486DX2-50MHz |
closed |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
closed |
open |
|
ODP486SX-33MHz |
closed |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
open |
closed |
|
ODP486SX-25MHz |
closed |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
closed |
open |
|
80486DX-50MHz |
closed |
pins 1 & 2 |
pins 1 & 2 |
pins 2 & 3 |
closed |
open |
|
80486DX-33MHz |
closed |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
open |
closed |
|
80486DX-25MHz |
closed |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
closed |
open |
|
80487SX-33MHz |
closed |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
open |
closed |
|
80487SX-25MHz |
closed |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
closed |
open |
|
80486SX-33MHz |
open |
pins 2 & 3 |
open |
pins 1 & 2 |
open |
closed |
|
80486SX-25MHz |
open |
pins 2 & 3 |
open |
pins 1 & 2 |
closed |
open |