DIGITAL EQUIPMENT CORPORATION
CELEBRIS 486
|
Device Type |
Mainboard |
|
Processor |
80486SX/80486DX/80486DX2/P24D/P24T/P24CT |
|
Processor Speed |
25/33/50(internal)/66(internal)/100(internal)MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
Unidentified |
|
Maximum Onboard Memory |
128MB |
|
Maximum Video Memory |
1MB |
|
Cache |
256KB |
|
BIOS |
Unidentified |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
Floppy drive interface, IDE interface, PS/2 mouse port, riser slot |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Chassis fan power |
C1 |
PS/2 mouse port |
CN4 |
|
Speaker |
C2 |
Floppy drive interface |
CN5 |
|
VGA port |
CN1 |
IDE interface |
CN6 |
|
Serial port |
CN2 |
Riser slot |
SL1 |
|
Parallel port |
CN3 | ||
|
Note: VGA & serial port are shown for informational purposes only. The location may not be exact. | |||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
EEPROM write control disabled |
J24 |
Pins 2 & 3 closed |
|
EEPROM write control enabled |
J24 |
Pins 1 & 2 closed | |
|
|
Setup control disabled |
J25 |
Pins 2 & 3 closed |
|
Setup control enabled |
J25 |
Pins 1 & 2 closed | |
|
|
Floppy drive write control disabled |
J26 |
Pins 2 & 3 closed |
|
Floppy drive write control enabled |
J26 |
Pins 1 & 2 closed | |
|
SIMM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
8MB |
(1) 2M x 36 |
None |
None |
None |
|
16MB |
(1) 4M x 36 |
None |
None |
None |
|
16MB |
(1) 2M x 36 |
(1) 2M x 36 |
None |
None |
|
24MB |
(1) 4M x 36 |
(1) 2M x 36 |
None |
None |
|
24MB |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
None |
|
24MB |
(1) 2M x 36 |
(1) 4M x 36 |
None |
None |
|
32MB |
(1) 8M x 36 |
None |
None |
None |
|
32MB |
(1) 4M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
None |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
None |
None |
|
32MB |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
40MB |
(1) 8M x 36 |
(1) 2M x 36 |
None |
None |
|
40MB |
(1) 4M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
40MB |
(1) 2M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
None |
|
40MB |
(1) 2M x 36 |
(1) 8M x 36 |
None |
None |
|
48MB |
(1) 8M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
None |
|
48MB |
(1) 8M x 36 |
(1) 4M x 36 |
None |
None |
|
48MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
None |
|
SIMM CONFIGURATION (CONT) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
48MB |
(1) 4M x 36 |
(1) 8M x 36 |
None |
None |
|
56MB |
(1) 8M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
56MB |
(1) 2M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
64MB |
(1) 8M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
None |
|
64MB |
(1) 8M x 36 |
(1) 8M x 36 |
None |
None |
|
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
72MB |
(1) 2M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
None |
|
80MB |
(1) 8M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
80MB |
(1) 4M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
None |
|
96MB |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
None |
|
104MB |
(1) 2M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
112MB |
(1) 4M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
128MB |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
CACHE CONFIGURATION |
|
Note: 256KB cache is factory installed and is not configurable. The location is unidentified. |
|
VIDEO MEMORY CONFIGURATION |
|
Note: 1MB video memory is factory installed and is not configurable. The location is unidentified. |
|
CPU SPEED SELECTION | |
|
Speed |
J6 |
|
25MHz |
Pins 2 & 3 closed |
|
33MHz |
Pins 1 & 2 closed |
|
50iMHz |
Pins 2 & 3 closed |
|
66iMHz |
Pins 1 & 2 closed |
|
100iMHz |
Pins 1 & 2 closed |
|
CPU TYPE SELECTION | |
|
Type |
J50 |
|
80486SX |
Open |
|
80486DX |
Open |
|
80486DX2 |
Open |
|
P24D |
Closed |
|
P24T |
Closed |
|
P24CT |
Closed |
|
SERIAL BOOT CONTROL SELECTION | ||
|
Setting |
J7 |
J8 |
|
Disabled |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
Enabled |
Pins 1 & 2 closed |
Pins 1 & 2 closed |