WYSE DECISION 486SE Motherboard Settings and Configuration
WYSE TECHNOLOGY, INC.
WYSE DECISION 486SE
Processor | 80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
Processor Speed | 16/20/25/33/50(Internal)/50/66(Internal) |
Chip Set | OPTI |
Max. Onboard DRAM | 128MB |
SRAM Cache | 128/256/512KB |
BIOS | Phoenix |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit local bus slots (2), CPU processor slot |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Speaker | J1 | 32-bit local bus slot | SL1 |
Power LED & keylock | J2 | 32-bit local bus slot | SL2 |
Reset switch | S1 | CPU processor slot | SL3 |
USER CONFIGURABLE SETTINGS SYSTEM BOARD | |||
Function | Jumper | Position | |
» | Factory configured - do not alter | JP1 | closed |
» | Factory configured - do not alter | JP2 | closed |
» | Factory configured - do not alter | JP3 | closed |
» | Factory configured - do not alter | JP4 | closed |
» | Factory configured - do not alter | JP5 | closed |
» | Factory configured - do not alter | JP6 | closed |
» | Factory configured - do not alter | JP7 | pins 2 & 3 closed |
» | Monitor type select color | JP8 | closed |
| Monitor type select monochrome | JP8 | open |
» | Factory configured - do not alter | JP12 | closed |
» | Factory configured - do not alter | JP13 | closed |
» | Factory configured - do not alter | JP14 | closed |
» | Factory configured - do not alter | JP15 | open |
» | Factory configured - do not alter | JP16 | closed |
DRAM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
4MB | (4) 1M x 9 | NONE |
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 |
64MB | (4) 16M x 9 | NONE |
128MB | (4) 16M x 9 | (4) 16M x 9 |
BUS CLOCK CONFIGURATION | ||||
Speed | JP9 | JP10 | JP11 | |
» | £ 25MHz | Open | Open | pins 2 & 3 closed |
| ³ 33MHz | Closed | Open | pins 1 & 2 closed |
» | 16MHz synchronous | Open | Open | pins 2 & 3 closed |
» | 20MHz synchronous | Open | Open | pins 2 & 3 closed |
| 25MHz synchronous | Closed | Open | pins 1 & 2 closed |
| 50MHz synchronous | Closed | Open | pins 1 & 2 closed |
USER CONFIGURABLE SETTINGS CPU BOARD | |||
Function | Jumper | Position | |
» | Factory configured - do not alter | JP4 | open |
» | Factory configured - do not alter | JP5 | closed |
» | Clock generator/oscillator enabled | JP14 | pins 1 & 2 closed |
| Clock generator/oscillator disabled | JP14 | pins 2 & 3 closed |
Note: Clock generator is installed in U34 on board X770171 and in U33 on board Y77071. | |||
SRAM JUMPER CONFIGURATION | |||||||
Size | JP6 | JP8 | JP9 | JP10 | JP11 | JP12 | JP13 |
128KB | pins 1 & 2 closed | closed | open | open | closed | open | open |
256KB | pins 2 & 3 closed | closed | closed | open | closed | closed | open |
512KB | pins 1 & 2 closed | closed | closed | closed | closed | closed | closed |
SRAM CONFIGURATION | ||||||
Size | Cache | Location | TAG/U26 | TAG/U27 | TAG/U16 | Dirty Bit/U25 |
64KB | (8) 8K x 8 | Banks 0 & 1 | NONE | NONE | (1) 16K x 1 | (1) 64K x 1 |
128KB | (4) 32K x 8 | Bank 0 | NONE | (1) 8K x 8 | (1) 16K x 1 | (1) 64K x 1 |
256KB | (8) 32K x 8 | Banks 0 & 1 | (1) 8K x 8 | (1) 8K x 8 | (1) 16K x 1 | (1) 64K x 1 |
512KB | (8) 128K x 8 | Bank 0 | NONE | (1) 32K x 8 | (1) 64K x 1 | (1) 64K x 1 |
Note: For Tag Ram U16 may be occupied with 64K x 1 chips. | ||||||
CPU SPEED CONFIGURATION | |||||
Type | CPU Speed | JP1 | JP2 | JP3 | JP7 |
80486SX | 16MHz | pins 2 & 3 | pins 2 & 3 | open | open |
80487SX | 16MHz | closed | pins 2 & 3 | pins 1 & 2 | open |
80486SX | 20MHz | pins 2 & 3 | pins 2 & 3 | open | open |
80487SX | 20MHz | closed | pins 2 & 3 | pins 1 & 2 | open |
80486SX | 25MHz | pins 2 & 3 | pins 2 & 3 | open | closed |
80486SX | 33MHz | pins 2 & 3 | pins 2 & 3 | open | closed |
80486DX | 25MHz | closed | pins 2 & 3 | pins 2 & 3 | closed |
80486DX | 33MHz | closed | pins 2 & 3 | pins 2 & 3 | closed |
80486DX2/50i | 25MHz | closed | pins 2 & 3 | pins 2 & 3 | closed |
80486DX2/66i | 33MHz | closed | pins 2 & 3 | pins 2 & 3 | closed |
Note: Pins designated should be in the closed position. | |||||
CPU TYPE CONFIGURATION SWITCH 1 BOARD X77017 | ||||||||
Type | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 | SW1/7 | SW1/8 |
80486SX/16MHz | off | on | off | on | on | off | on | off |
80487SX/16MHz | off | on | off | on | on | off | on | off |
80486SX/20MHz | off | off | off | on | on | off | on | off |
80487SX/20MHz | off | off | off | on | on | off | on | off |
80486SX/25MHz | off | on | on | off | on | off | on | off |
80486SX/33MHz | off | on | on | off | on | off | on | off |
80486DX/25MHz | off | on | on | off | on | off | on | off |
80486DX/33MHz | off | on | on | off | on | off | on | off |
80486DX2/50iMHz | off | on | on | off | on | off | on | off |
80486DX2/66iMHz | off | off | on | off | on | off | on | off |
CPU TYPE CONFIGURATION SWITCH 1 BOARD Y77017 | ||||||||
Type | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 | SW1/7 | SW1/8 |
80486SX/16MHz | on | off | off | on | on | off | on | off |
80487SX/16MHz | on | off | off | on | on | off | on | off |
80486SX/20MHz | off | off | on | on | on | off | off | off |
80487SX/20MHz | off | off | on | on | on | off | off | off |
80486SX/25MHz | off | off | on | on | on | off | on | off |
80486SX/33MHz | off | on | on | on | on | off | on | off |
80486DX/25MHz | on | off | on | on | on | off | on | off |
80486DX/33MHz | off | on | on | on | on | off | on | off |
80486DX2/50iMHz | on | on | on | on | on | off | on | off |
80486DX2/66iMHz | off | off | on | on | on | off | on | off |
My Books
