ACER, INC.
486 SYSTEM (V20L)
|
Processor |
AM486SX/80486SX/AM486DX/80486DX/CX486DX2/AM486DX2/ 80486DX2/P24D/P24T |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
48MB |
|
Maximum Video Memory |
None |
|
Cache |
128/256/512KB |
|
BIOS |
Unidentified |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA local bus slot, floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Serial port 1 |
CN1 |
Power LED & keylock |
CN9 pins 1 - 4 |
|
Serial port 2 |
CN2 |
Reset switch/green PC connector |
CN9 pins 7 & 8 |
|
Parallel port |
CN3 |
Power LED & keylock |
CN10 pins 1 - 5 |
|
Floppy drive interface |
CN4 |
Speaker |
CN10 pins 7 - 10 |
|
IDE interface 1 |
CN5 |
Turbo LED |
CN10 pins 12 & 13 |
|
IDE interface 2 |
CN6 |
Turbo switch |
CN10 pins 15 - 17 |
|
PS/2 mouse port |
CN7 |
Reset switch |
CN10 pins 19 & 20 |
|
IDE interface LED |
CN8 |
32-bit VESA local bus slots |
SL1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Password disabled |
JP1 |
Pins 2 & 3 closed |
|
Password enabled |
JP1 |
Pins 1 & 2 closed | |
|
|
OEM BIOS enabled |
JP2 |
Pins 2 & 3 closed |
|
|
Factory configured - do not alter |
JP2 |
Pins 1 & 2 closed |
|
|
M5115 I/O enabled |
JP8 |
Pins 1 & 2 closed |
|
M5115 I/O disabled |
JP8 |
Pins 2 & 3 closed | |
|
Jumper information unidentified |
JP10 |
Unidentified | |
|
|
Local bus IDE I/O address select 0FXH |
JP11 |
Pins 1 & 2 closed |
|
Local bus IDE I/O address select 07XH |
JP11 |
Pins 2 & 3 closed | |
|
|
M5213N local bus IDE enabled |
JP12 |
Pins 2 & 3 closed |
|
M5213N local bus IDE disabled |
JP12 |
Pins 1 & 2 closed | |
|
|
Reset key enabled |
JP23 |
Pins 1 & 2 closed |
|
Reset key disabled |
JP23 |
Pins 2 & 3 closed | |
|
|
Green PC connector enabled |
JP24 |
Pins 2 & 3 closed |
|
Reset switch enabled |
JP24 |
Pins 1 & 2 closed | |
|
|
Factory configured - do not alter |
JP41 |
Pins 2 & 3 closed |
|
DRAM CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
4MB |
None |
None |
(1) 1M x 36 |
|
8MB |
None |
(1) 1M x 36 |
(1) 1M x 36 |
|
8MB |
None |
None |
(1) 2M x 36 |
|
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
12MB |
(1) 2M x 36 |
None |
(1) 1M x 36 |
|
12MB |
(1) 1M x 36 |
None |
(1) 2M x 36 |
|
12MB |
None |
(1) 1M x 36 |
(1) 2M x 36 |
|
16MB |
None |
None |
(1) 4M x 36 |
|
16MB |
(1) 2M x 36 |
None |
(1) 2M x 36 |
|
16MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 2M x 36 |
|
16MB |
(1) 2M x 36 |
None |
(1) 2M x 36 |
|
DRAM CONFIGURATION (CON'T) | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
20MB |
None |
(1) 4M x 36 |
(1) 1M x 36 |
|
20MB |
None |
(1) 1M x 36 |
(1) 4M x 36 |
|
24MB |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 1M x 36 |
|
24MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
|
24MB |
(1) 2M x 36 |
None |
(1) 4M x 36 |
|
24MB |
(1) 2M x 36 |
None |
(1) 4M x 36 |
|
24MB |
(1) 4M x 36 |
None |
(1) 2M x 36 |
|
24MB |
None |
(1) 4M x 36 |
(1) 2M x 36 |
|
28MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 2M x 36 |
|
28MB |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 2M x 36 |
|
32MB |
None |
(1) 4M x 36 |
(1) 4M x 36 |
|
36MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 1M x 36 |
|
36MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
|
36MB |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
40MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 2M x 36 |
|
48MB |
(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 |
(1) 32K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
512KB |
(4) 128K x 8 |
None |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |||
|
Size |
JP13 |
JP15 |
JP16 |
|
128KB |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
|
256KB |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
|
512KB |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
CPU SPEED SELECTION | ||
|
Speed |
JP17 |
JP21 |
|
25MHz |
Pins 1 & 5 closed |
Pins 2 & 3 closed |
|
33MHz |
Pins 2 & 6 closed |
Pins 2 & 3 closed |
|
40MHz |
Pins 3 & 7 closed |
Pins 1 & 2 closed |
|
50iMHz |
Pins 1 & 5 closed |
Pins 2 & 3 closed |
|
50MHz |
Pins 4 & 8 closed |
Pins 1 & 2 closed |
|
66iMHz |
Pins 2 & 6 closed |
Pins 2 & 3 closed |
|
CPU TYPE SELECTION | |||
|
Type |
JP20 |
JP26 |
JP27 |
|
AM486SX |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
80486SX |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
AM486DX |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
80486DX |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
CX486DX2 |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Open |
|
AM486DX2 |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
80486DX2 |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
P24D |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
P24T |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
CPU TYPE SELECTION (CON'T) | ||||
|
Type |
JP33 |
JP34 |
JP35 |
JP37 |
|
AM486SX |
Pins 1 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
80486SX |
Pins 1 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
AM486DX |
Pins 1 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
80486DX |
Pins 1 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
CX486DX2 |
Pins 2 & 4 closed |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
|
AM486DX2 |
Pins 1 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
80486DX2 |
Pins 1 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
P24D |
Pins 1 & 3 closed |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
|
P24T |
Pins 1 & 3 closed |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Pins 2 & 3 closed |