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Layout - Graphic -41.8 KB
Jumpers:
| J1:Keylock & Power Led Connector | |||
| Connector | Usage | Pin | Description |
| J1 | Keylock & Power Led | 1 | Led Power |
| 2 | Not Used | ||
| 3 | Ground | ||
| 4 | Keyboard Inhibiter | ||
| 5 | Ground | ||
| J2:Speaker Connector | |||
| Connector | Usage | Pin | Description |
| J2 | Speaker | 1 | Data Out |
| 2 | Not Used | ||
| 3 | Ground | ||
| 4 | +5V | ||
| J3: Turbo Switch Connector | |||
| Connector | Usage | Pin | Description |
| J3 | Turbo Switch | 1 | Ground |
| 2 | Select Pin | ||
| J4: Reset Switch Connector | |||
| Connector | Usage | Pin | Description |
| J4 | Reset | 1 | Ground |
| 2 | Reset In | ||
| J5: Turbo Led Connector | |||
| Connector | Usage | Pin | Description |
| J5 | Turbo Led | 1 | + Anode |
| 2 | - Cathode | ||
| J6: External Battery Connector | |||
| Connector | Usage | Pin | Description |
| J6 | Battery | 1 | Battery + |
| 2,3 | Short in internal Battery. Used by 3.6 V | ||
| 4 | Ground | ||
| J7: Keyboard Connector | |||
| Connector | Usage | Pin | Description |
| J7 | Keyboard | 1 | Keyboard Clock |
| 2 | Keyboard Data | ||
| 3 | Space | ||
| 4 | Ground | ||
| 5 | + 5 V | ||
386/486 Mode Selection
| CPU Type Selection | ||||
| CPU Type | JP14 | JP20 | JP25 | JP27 |
| 386 Mode | OPEN | 2-3 | 1-2 | 1-2 |
| 486 Mode | Close | 1-2 | 2-3 | 2-3 |
CPU Type Selection
| JP2 | JP18 | JP19 | Usage |
| 1-2 | Close | 1-2 | 486DX,486DX2 |
| Open | Open | 2-3 | 486SX(PGA) |
| 2-3 | Close | 1-2 | 487SX, Overdrive |
Upgrade Jumper
| JP15: Upgrade Jumper | |
| Open | No Upgrade (Enable 486SX/386DX,SMD) |
| Close | Upgrade (Disable 486SX/386DX SMD) |
CPU Speed Rate Selection
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| Jumper | 486SX-25 Mhz
486DX-25 Mhz 486DX2-50 Mhz Overdrive -25 Mhz |
486SX-33 Mhz
486DX-33 Mhz 486DX2-66 Mhz Overdrive-33 Mhz |
486DX-50 Mhz |
| JP6 | OPEN | OPEN | OPEN |
| JP7 | OPEN | OPEN | CLOSE |
| JP8 | OPEN | CLOSE | OPEN |
| JP9 | 1-2 | 1-2 | 1-2 |
| JP22 | CLOSE | OPEN | OPEN |
Note: JP28 :
Open for old version 486DX-50 Mhz CPU
Close for New version 486DX-50 Mhz CPU
Miscellaneous Jumpers:
| JP1 | VESA IDE4 |
| JP12 | VESA IDE3 |
| JP13 | VESA IDE2 |
| JP23 | FACTORY JUMPER |
| JP24 | 87DLC PQFP
OPEN-ENABLE CLOSE-DISABLE |
| JP21 | COLOR/MONO MONITOR
OPEN-MONO CLOSE-COLOR |
| JP24 | VESA CARD SELECT ON VL1 SLOT
1-2: USE WD31 RUN 50 MHZ VESA VGA OR TEKRAM VESA CACHE IDE OR OTHER SPECIAL VESA 2-3: USE STANDARD VESA VGA IN VL SLOT1 (DEFAULT) |
| JP26 | BATTERY TYPE
1-2: LITHIUM DISCHARGE BATTERY 3.6V USE 2-3: NI-CAD RECHARGEABLE BATTERY 3.6V (DEFAULT) |
Page updated 98/07/14
