UNIDENTIFIED
486 VESA (REV. VL 421A/422)
Processor | CX486S/80486SX/80487SX/80486DX/80486DX2/P24T |
Processor Speed | 20/25/33/40/50(internal)/50/66(internal)MHz |
Chip Set | Forex |
Video Chip Set | None |
Maximum Onboard Memory | 36MB |
Maximum Video Memory | None |
Cache | 64/128/256KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit VESA local bus slots (2) |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | JP2 | Turbo switch | JP15 |
Reset switch | JP3 | Turbo LED | JP16 |
Power LED & keylock | JP9 | 32-bit VESA local bus slots | SL1 & SL2 |
Speaker | JP10 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
Battery type select internal | JP2 | Pins 1 & 2 closed | |
Battery type select external | JP2 | Closed | |
» | Factory configured - do not alter | JP5 | Unidentified |
» | Factory configured - do not alter (CMOS) | JP6 | Unidentified |
DRAM CONFIGURATION | |||
Size | Bank 0 | Bank 1 | Bank 2 |
1MB | None | (4) 256K x 9 | None |
2MB | None | (4) 256K x 9 | (4) 256K x 9 |
4MB | (8) 411000 | None | None |
4MB | None | (4) 1M x 9 | None |
5MB | (8) 411000 | (4) 256K x 9 | None |
5MB | None | (4) 1M x 9 | (4) 256K x 9 |
8MB | (8) 411000 | (4) 1M x 9 | None |
8MB | None | (4) 1M x 9 | (4) 1M x 9 |
12MB | (8) 411000 | (4) 1M x 9 | (4) 1M x 9 |
16MB | None | (4) 4M x 9 | None |
20MB | (8) 411000 | (4) 4M x 9 | None |
32MB | None | (4) 4M x 9 | (4) 4M x 9 |
36MB | (8) 411000 | (4) 4M x 9 | (4) 4M x 9 |
Note: The location of banks 1 & 2 are unidentified. |
DRAM JUMPER SELECTION | |
Setting | JP105 |
DIPPs used as bank 0 | Pins 1 & 2 closed |
SIMMs used as bank 0 | Pins 2 & 3 closed |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
128KB | (4) 32K x 8 | None | (1) 8K x 8 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | ||||
Size | JP8A | JP8B | JP8D | JP8E |
64KB | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 2 & 3 closed |
128KB | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed |
256KB | Pins 2 & 3 closed | Pins 1 & 2 closed | Pins 2 & 3 closed | Pins 1 & 2 closed |
CPU SPEED SELECTION | |||
Speed | JP7A | JP7B | JP7C |
20MHz | Pins 2 & 3 closed | Pins 1 & 2 closed | Pins 1 & 2 closed |
25MHz | Pins 1 & 2 closed | Pins 2 & 3 closed | Pins 1 & 2 closed |
33MHz | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 2 & 3 closed |
40MHz | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 1 & 2 closed |
50iMHz | Pins 1 & 2 closed | Pins 2 & 3 closed | Pins 1 & 2 closed |
50MHz | Pins 2 & 3 closed | Pins 1 & 2 closed | Pins 2 & 3 closed |
66iMHz | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 2 & 3 closed |
CPU TYPE SELECTION | |||
Type | JP12 | JP13 | JP29 |
CX486S | N/A | N/A | N/A |
80486 (PQFP) | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 2 & 3 closed |
80486SX | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 2 & 3 closed |
80487SX | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 2 & 3 closed |
80486DX | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed |
80486DX2 | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed |
P24T | N/A | N/A | N/A |
CPU TYPE SELECTION (CON’T) | ||||
Type | JP30 | JP104 | JP109 | JP110 |
CX486S | N/A | N/A | N/A | Pins 1 & 2 closed |
80486 (PQFP) | Pins 2 & 3 closed | N/A | N/A | N/A |
80486SX | Pins 2 & 3 closed | N/A | N/A | N/A |
80487SX | Pins 2 & 3 closed | N/A | N/A | N/A |
80486DX | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 2 & 3 closed |
80486DX2 | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 2 & 3 closed |
P24T | N/A | Pins 2 & 3 closed | Pins 2 & 3 closed | N/A |
VL BUS WAIT STATE SELECTION | ||
Setting | JP102 | JP103 |
0 | Pins 1 & 2 closed | Pins 1 & 2 closed |
1 | Pins 2 & 3 closed | Pins 2 & 3 closed |