ACER, INC.
486 VESA SYSTEM (VER. 2)
Processor | 80486SX/80486DX/80486DX2 |
Processor Speed | 20/25/33/40/50(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 | 330mm x 218mm |
I/O Options | 32-bit VESA local bus slots (2), floppy drive interface, IDE interface, SCSI connector, parallel port, PS/2 mouse port, serial ports (2) |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
PS/2 mouse port | CN1 | IDE interface | CN8 |
HDD/FDD power connector for EPA | CN2 | VGA control connector for EPA | J4 |
SCSI interface | CN3 | Chassis fan power | J9 |
Parallel port | CN4 | Front panel LEDs | J10 |
Serial port 1 | CN5 | Auxiliary keyboard/PS/2 mouse | J11 |
Serial port 2 | CN6 | IDE interface LED | J12 |
Floppy drive interface | CN7 | 32-bit VESA local bus slots | SL1 & SL2 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
Jumper information unavailable | CN9 | Unidentified | |
» | Password check disabled | JP1 | Pins 2 & 3 closed |
Password check enabled | JP1 | Pins 1 & 2 closed | |
Jumper information unavailable | JP2 | Unidentified | |
SCSI IRQ select IRQ10 | JP3 | Pins 1 & 2 closed | |
SCSI IRQ select IRQ11 | JP3 | Pins 2 & 3 closed | |
SCSI IRQ disabled | JP3 | Open | |
» | Factory configured - do not alter | JP4 | Open |
» | Factory configured - do not alter | JP5 | Open |
SCSI I/O address select 340h - 35Fh | JP6 | Open | |
SCSI I/O address select 140h - 15Fh | JP6 | Closed | |
Onboard M5105 disabled | JP7 | Open | |
Onboard M5105 enabled | JP7 | Closed | |
» | Parallel port bidirectional enabled | JP8 | Closed |
Parallel port bidirectional disabled | JP8 | Open | |
Battery type select internal | JP9 | Closed | |
Battery type select external | JP9 | Open | |
Reset button disabled | JP23 | Open | |
Reset button enabled | JP23 | Closed | |
Keylock enabled | JP24 | Open | |
Keylock disabled | JP24 | Closed |
DRAM CONFIGURATION | |||||
Size | Bank 0A | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
4MB | 4MB | None | None | None | None |
8MB | 4MB | None | (1) 1M x 36 | None | None |
12MB | 4MB | None | (1) 1M x 36 | (1) 1M x 36 | None |
16MB (A) | 4MB | None | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 |
16MB (B) | 4MB | (1) 4M x 36 | None | None | None |
20MB | 4MB | None | (1) 4M x 36 | None | None |
24MB | 4MB | None | (1) 1M x 36 | (1) 4M x 36 | None |
32MB | 4MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
36MB | 4MB | None | (1) 4M x 36 | (1) 4M x 36 | None |
40MB | 4MB | None | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x 36 |
48MB | 4MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 | None |
64MB | 4MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 |
Note: If Bank 0 is populated, Bank 0A needs to be disabled with JP15.. |
DRAM JUMPER CONFIGURATION | |
Size | JP15 |
4MB | Pins 2 & 3 closed |
8MB | Pins 2 & 3 closed |
12MB | Pins 2 & 3 closed |
16MB (A) | Pins 2 & 3 closed |
16MB (B) | Pins 1 & 2 closed |
20MB | Pins 2 & 3 closed |
24MB | Pins 2 & 3 closed |
32MB | Pins 1 & 2 closed |
36MB | Pins 2 & 3 closed |
40MB | Pins 2 & 3 closed |
48MB | Pins 1 & 2 closed |
64MB | Pins 1 & 2 closed |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
128KB | (4) 32K x 8 | None | (1) 32K x 8 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | |||
Size | JP20 | JP21 | JP22 |
128KB | Pins 1 & 2 closed | Closed | Open |
256KB | Pins 2 & 3 closed | Closed | Closed |
CPU SPEED SELECTION | |
Speed | JP10 |
20MHz | Pins 1 & 6 closed |
25MHz | Pins 2 & 7 closed |
33MHz | Pins 3 & 8 closed |
40MHz | Pins 4 & 9 closed |
50iMHz | Pins 2 & 7 closed |
50MHz | Pins 5 & 10 closed |
66iMHz | Pins 3 & 8 closed |
VL BUS WAIT STATE SELECTION | ||
Setting | JP11 | |
» | 0 | Open |
1 | Closed |