DIGITAL EQUIPMENT CORPORATION
PRIORIS HX MP
Device Type | Mainboard |
Processor | Pentium |
Processor Speed | 75/90/100/120/133/150/166/180/200MHz |
Chip Set | Unidentified |
Video Chip Set | Cirrus Logic |
Maximum Onboard Memory | 1GB |
Maximum Video Memory | 512KB |
Cache | 256/512KB |
BIOS | Unidentified |
Dimensions | 305mm x 244mm |
I/O Options | External memory cards (2), 32-bit PCI slots (6), floppy drive interface, parallel port, PS/2 mouse port, serial port, VGA port |
I/O Options (CPU) | Cache slots (2), VRM connectors (2) |

CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Chassis fan power | C1 | PS/2 mouse port | CN5 |
Chassis fan power | C2 | Floppy drive interface | CN6 |
Chassis fan power | C3 | 5v power | P1 |
Chassis fan power | C4 | 5v power | P2 |
OCP connector | C5 | 3.3v power | P3 |
SBB connector | C6 | CPU slot | SL1 |
DSM connector | C7 | External memory card | SL2 |
Serial port | CN1 | External memory card | SL3 |
Serial port | CN2 | CPU slot | SL4 |
VGA port | CN3 | 32-bit PCI slots | PC1 – PC6 |
Parallel port | CN4 | ||
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
» | DSM not installed | J7 | Closed |
DSM installed | J7 | Open | |
» | Door lock 1 enabled | J9 | Closed |
Door lock 1 disabled | J9 | Open | |
» | Door lock 2 enabled | J11 | Closed |
Door lock 2 disabled | J11 | Open | |
» | Recovery mode select normal operation | J13 | Open |
Recovery mode select recovery mode | J13 | Closed | |
» | Password normal operation | J14 | Open |
Password clear | J14 | Closed | |
» | On board video enabled | J32 | Closed |
On board video disabled | J32 | Open | |
» | VGA IRQ9 disabled | J33 | Open |
VGA IRQ9 enabled | J33 | Closed | |
» | Boot block update disabled | J38 | Pins 2 & 3 closed |
Boot block update enabled | J38 | Pins 1 & 2 closed | |
» | BIOS upgrade disabled | J39 | Open |
BIOS upgrade enabled | J39 | Closed | |
SIMM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
32MB | (4) 2M x 36 | None | None | None |
64MB | (4) 2M x 36 | (4) 2M x 36 | None | None |
64MB | (4) 4M x 36 | None | None | None |
96MB | (4) 2M x 36 | (4) 2M x 36 | (4) 2M x 36 | None |
128MB | (4) 4M x 36 | (4) 4M x 36 | None | None |
128MB | (4) 8M x 36 | None | None | None |
128MB | (4) 2M x 36 | (4) 2M x 36 | (4) 2M x 36 | (4) 2M x 36 |
192MB | (4) 4M x 36 | (4) 4M x 36 | (4) 4M x 36 | None |
256MB | (4) 4M x 36 | (4) 4M x 36 | (4) 4M x 36 | (4) 4M x 36 |
256MB | (4) 8M x 36 | (4) 8M x 36 | None | None |
512MB | (4) 8M x 36 | (4) 8M x 36 | (4) 8M x 36 | (4) 8M x 36 |
Note: For maximum memory of 1GB, install 2 memory cards with 512MB installed. | ||||

CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Cache slot | SL1 | VRM connector | VRM1 |
Cache slot | SL2 | VRM connector | VRM2 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
APIC enabled | J10 | Closed | |
APIC disabled | J10 | Open | |
CACHE CONFIGURATION | |
Size | SL1/SL2 |
256KB | 256KB module installed |
512KB | 512KB module installed |
Note: SL1 is for CPU1 & SL2 is for CPU2. | |
CPU SPEED SELECTION | ||||||
CPU speed | Clock speed | Multiplier | J3 | J4 | J7 | J8 |
75MHz | 50MHz | 1.5x | Open | Open | Open | Open |
90MHz | 60MHz | 1.5x | Open | Open | Open | Open |
100MHz | 66MHz | 1.5x | Open | Open | Open | Open |
120MHz | 60MHz | 2x | Open | Closed | Open | Closed |
133MHz | 66MHz | 2x | Open | Closed | Open | Closed |
150MHz | 60MHz | 2.5x | Closed | Closed | Closed | Closed |
166MHz | 66MHz | 2.5x | Closed | Closed | Closed | Closed |
180MHz | 60MHz | 3x | Closed | Open | Closed | Open |
200MHz | 66MHz | 3x | Closed | Open | Closed | Open |
Note: J3 & J4 are for CPU 1. J7 & J8 are for CPU2. | ||||||