486 CONTAQ CACHE Motherboard Settings and Configuration
ATLANTIC COMPUTER PRODUCTS, INC.
486 CONTAQ CACHE
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 20/25/33/50(internal)/50/66(internal)MHz |
Chip Set | Contaq |
Max. onboard DRAM | 32MB |
SRAM Cache | 64/256KB |
BIOS | AMI |
Dimensions | 238mm x 220mm |
I/O Options | 32-bit VESA local bus slot |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | JP5 | Speaker | JP33 |
Turbo switch | JP30 | Power LED & keylock | JP34 |
Turbo LED | JP31 | 32-bit VESA local bus slot | S1 |
Reset switch | JP32 |
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USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Monitor type select color | JP1 | Closed |
| Monitor type select monochrome | JP1 | Open |
» | CMOS memory normal operation | JP6 | pins 1 & 2 closed |
| CMOS memory clear | JP6 | pins 2 & 3 closed |
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) 1M x 9 |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE |
32MB | (4) 4M x 9 | (4) 4M x 9 |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | ||||
Size | JP11 | JP12 | JP13 | JP41 |
64KB | Open | Open | Open | pins 2 & 3 closed |
256KB | Closed | Closed | pins 1 & 2 closed | pins 2 & 3 closed |
CPU TYPE CONFIGURATION | ||||
CPU Type | JP2 | JP3 | JP7 | JP8 |
80486SX | Open | pins 1 & 2 closed | Open | Open |
80487SX | pins 1 & 2 closed | pins 2 & 3 closed | Closed | Closed |
80486DX | pins 2 & 3 closed | pins 2 & 3 closed | Open | Closed |
80486DX2 | pins 2 & 3 closed | pins 2 & 3 closed | Open | Closed |
CPU SPEED CONFIGURATION | |||||||
CPU | OSC1 | JP15 Type A | JP15 Type B | JP22 | JP23 | ||
| 20MHz | 40MHz | pins 3 & 4 | pins 2 & 3 | Open | Open | |
| 25MHz | 25MHz | pins 2 & 4 | pins 2 & 4 | Closed | Open | |
| 33MHz | 33MHz | pins 2 & 4 | pins 2 & 4 | Open | Closed | |
| 50i MHz | 25MHz | pins 2 & 4 | pins 2 & 4 | Closed | Open | |
| 50MHz | 50MHz | pins 2 & 4 | pins 2 & 4 | Closed | Closed | |
| 66i MHz | 33MHz | pins 2 & 4 | pins 2 & 4 | Open | Closed | |
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Note: Check the system board to determine if JP15 is type A or type B. Pins designated should be in the closed position. | |||||||
CHIPSET CONFIGURATION | ||||
Chipset | Mode | LJ4 | LJ5 | LJ6 |
82C591 | Synchronous mode | pins 2 & 3 closed | Closed | Open |
82C591 | Asynchronous mode | pins 1 & 2 closed | Open | Open |
82C591A | Synchronous mode | pins 2 & 3 closed | Open | Closed |
82C591A | Asynchronous mode | pins 1 & 2 closed | Open | Open |
VESA WAIT STATE (ID2) CONFIGURATION | ||
Wait states | CPU speed | LJ1 (ID2) |
0 wait states | £ 33MHz | Open |
1 wait state | > 33MHz | Closed |
VESA BUS SPEED (ID3) CONFIGURATION | |
CPU speed | LJ2 (ID3) |
£ 33MHz | Open |
> 33MHz | Closed |
VESA ID4 CONFIGURATION | |
Setting | LJ3 (ID4) |
Reserved for future use | Closed |
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