ATLANTIC COMPUTER PRODUCTS, INC.
486 CONTAQ CACHE
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Processor |
80486SX/80487SX/80486DX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/50/66(internal)MHz |
|
Chip Set |
Contaq |
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Max. onboard DRAM |
32MB |
|
SRAM Cache |
64/256KB |
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BIOS |
AMI |
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Dimensions |
238mm x 220mm |
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I/O Options |
32-bit VESA local bus slot |
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NPU Options |
None |
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CONNECTIONS |
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Purpose |
Location |
Purpose |
Location |
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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 |
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Function |
Jumper |
Position |
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Monitor type select color |
JP1 |
Closed |
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Monitor type select monochrome |
JP1 |
Open |
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CMOS memory normal operation |
JP6 |
pins 1 & 2 closed |
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CMOS memory clear |
JP6 |
pins 2 & 3 closed |
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DRAM CONFIGURATION |
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|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(4) 256K x 9 |
NONE |
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2MB |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
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5MB |
(4) 256K x 9 |
(4) 1M x 9 |
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8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
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CACHE CONFIGURATION |
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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 |
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CACHE JUMPER CONFIGURATION |
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|
Size |
JP11 |
JP12 |
JP13 |
JP41 |
|
64KB |
Open |
Open |
Open |
pins 2 & 3 closed |
|
256KB |
Closed |
Closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
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CPU TYPE CONFIGURATION |
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|
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 |
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CPU SPEED CONFIGURATION |
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|
CPU |
OSC1 |
JP15 Type A |
JP15 Type B |
JP22 |
JP23 |
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|
20MHz |
40MHz |
pins 3 & 4 |
pins 2 & 3 |
Open |
Open |
|
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|
25MHz |
25MHz |
pins 2 & 4 |
pins 2 & 4 |
Closed |
Open |
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|
33MHz |
33MHz |
pins 2 & 4 |
pins 2 & 4 |
Open |
Closed |
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|
50i MHz |
25MHz |
pins 2 & 4 |
pins 2 & 4 |
Closed |
Open |
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50MHz |
50MHz |
pins 2 & 4 |
pins 2 & 4 |
Closed |
Closed |
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|
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. |
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CHIPSET CONFIGURATION |
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|
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 |
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VESA WAIT STATE (ID2) CONFIGURATION |
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|
Wait states |
CPU speed |
LJ1 (ID2) |
|
0 wait states |
£ 33MHz |
Open |
|
1 wait state |
> 33MHz |
Closed |
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VESA BUS SPEED (ID3) CONFIGURATION |
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|
CPU speed |
LJ2 (ID3) |
|
£ 33MHz |
Open |
|
> 33MHz |
Closed |
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VESA ID4 CONFIGURATION |
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|
Setting |
LJ3 (ID4) |
|
Reserved for future use |
Closed |