JOINDATA SYSTEMS, INC.
G486PEL
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Processor |
80486SX/80487SX/80486DX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/50/66(internal)MHz |
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Chip Set |
OPTI |
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Max. Onboard DRAM |
128MB |
|
Cache |
64/128/256KB |
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BIOS |
AMI |
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Dimensions |
330mm x 218mm |
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I/O Options |
32-bit local bus card slots (2) |
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NPU Options |
4167 |
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CONNECTIONS |
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Purpose |
Location |
Purpose |
Location |
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32-bit local bus card |
COM1 |
Turbo switch |
J11 |
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32-bit local bus card |
COM2 |
Speaker |
J12 |
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Reset switch |
J9 |
Power LED & keylock |
J13 |
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Turbo LED |
J10 |
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USER CONFIGURABLE SETTINGS |
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Function |
Jumper |
Position |
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Monitor type select monochrome |
JP1 |
Open |
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Monitor type select color |
JP1 |
Closed |
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Factory configured - do not alter |
JP2 |
pins 2 & 3 closed |
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DRAM CONFIGURATION |
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Size |
Bank 0 |
Bank 1 |
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4MB |
(4) 1M x 9 |
NONE |
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8MB |
(4) 1M x 9 |
(4) 1M x 9 |
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16MB |
(4) 4M x 9 |
NONE |
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20MB |
(4) 1M x 9 |
(4) 4M x 9 |
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20MB |
(4) 4M x 9 |
(4) 1M x 9 |
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32MB |
(4) 4M x 9 |
(4) 4M x 9 |
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64MB |
(4) 16M x 9 |
NONE |
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128MB |
(4) 16M x 9 |
(4) 16M x 9 |
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CACHE CONFIGURATION |
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Size |
Bank 0 |
Bank 1 |
TAG (U39) |
TAG(U42) |
Dirty Bit(U43) |
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64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
(1) 16K x 4 |
(1) 16K x 4 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
(1) 16K x 4 |
(1) 16K x 4 |
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256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 8K x 8 |
(1) 16K x 4 |
(1) 16K x 4 |
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Note:256KB configuration requires the addition of (1) 8K x 8 tag chip at (U38). |
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CACHE JUMPER CONFIGURATION |
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Size |
JP4 |
JP5 |
JP6 |
JP7 |
JP8 |
|
64KB |
Open |
Open |
Open |
Open |
pins 2 & 3 closed |
|
128KB |
Open |
Closed |
Open |
Closed |
pins 1 & 2 closed |
|
256KB |
Closed |
Closed |
Closed |
Closed |
pins 2 & 3 closed |
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CPU TYPE CONFIGURATION |
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|
Type |
JP15 |
JP17 |
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80486SX |
pins 1 & 2 closed |
pins 1 & 2, 3 & 4 closed |
|
80487SX |
pins 2 & 3 closed |
pins 1 & 2, 3 & 4 closed |
|
80486DX |
Open |
pins 2 & 3 closed |
|
80486DX2 |
Open |
pins 2 & 3 closed |
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CPU SPEED CONFIGURATION |
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Speed |
JP9 |
JP12 |
JP11 |
JP13 |
JP14 |
JP16 |
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80486SX-20 |
2 & 3 |
2 & 3 |
1 & 2 |
2 & 3 |
Open |
Open |
|
80486SX-25 |
1 & 2 |
1 & 2 |
1 & 2 |
2 & 3 |
Open |
Open |
|
80486DX-25 |
1 & 2 |
1 & 2 |
1 & 2 |
2 & 3 |
Open |
Open |
|
80486DX-33 |
1 & 2 |
1 & 2 |
2 & 3 |
2 & 3 |
Open |
Closed |
|
80486DX-50 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
Closed |
Closed |
|
80486DX2-50 |
1 & 2 |
1 & 2 |
1 & 2 |
2 & 3 |
Open |
Open |
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Note: Oscillator speed remains synchronous with the CPU, except when using an 80486DX2-50, the oscillator should be 25MHz. Pins designated should be in the closed position. |
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