DIGITAL EQUIPMENT CORPORATION
DECPC LPV, DECPC LPV+
Processor | 80486SX/80486DX/80486DX2 |
Processor Speed | 25/33/40/50(internal)/50/66(internal)MHz |
Chip Set | Unidentified |
Video Chip Set | None |
Maximum Onboard Memory | 64MB |
Maximum Video Memory | None |
Cache | 128/256KB |
BIOS | Unidentified |
Dimensions | 254mm x 218mm |
I/O Options | Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA port, riser slot |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
VGA port | CN1 | IDE interface | CN6 |
Parallel port | CN2 | Floppy drive interface | CN7 |
Serial port | CN3 | Front panel connector | CN8 |
Serial port | CN4 | Cache slot | SL1 |
PS/2 mouse port | CN5 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
» | Reset switch enabled | J9 | Closed |
Reset switch disabled | J9 | Open | |
» | RDY signal select VLRDY >CPURDY (connects through CPU bus) | J10 | Pins 1 & 2 closed |
RDY signal select VLRDY >CPURDY (synchronized through chipset) | J10 | Pins 2 & 3 closed | |
» | On board video enabled | J23 | Pins 1 & 2 closed |
On board video disabled | J23 | Pins 2 & 3 closed | |
» | VGA IRQ9 disabled | J25 | Open |
VGA IRQ9 enabled | J25 | Closed | |
» | Flash BIOS normal operation | J27 | Open |
Flash BIOS recovery mode | J27 | Closed | |
» | Factory configured - do not alter | J28 | Open |
» | Monitor type select monochrome | J29 | Open |
Monitor type select color | J29 | Closed |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
4MB | (1) 1M x 36 | None | None | None |
8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 | None |
16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 |
16MB | (1) 4M x 36 | None | None | None |
20MB | (1) 1M x 36 | (1) 4M x 36 | None | None |
24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x 36 | None |
32MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x 36 |
48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 | None |
64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
128KB | (4) 32K x 8 | None | Unidentified |
256KB | (4) 32K x 8 | (4) 32K x 8 | Unidentified |
CACHE JUMPER CONFIGURATION | ||||
Size | J3 | J4 | J6 | J7 |
None | Open | Open | Open | Open |
128KB | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed |
256KB | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 2 & 3 closed |
CPU SPEED SELECTION | |||
Speed | J18 | J19 | J20 |
25MHz | Open | Closed | Closed |
33MHz | Closed | Open | Closed |
40MHz | Closed | Open | Open |
50iMHz | Open | Closed | Closed |
50MHz | Open | Open | Open |
66iMHz | Closed | Open | Closed |
CPU TYPE SELECTION | ||
Type | J11 | J12 |
80486SX | Pins 2 & 3 closed | Pins 2 & 3 closed |
80486DX | Pins 1 & 2 closed | Pins 1 & 2 closed |
80486DX2 | Pins 1 & 2 closed | Pins 1 & 2 closed |