ACER, INC.
ISA486GSi MODEL IP25A
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/66(internal) |
|
Chip Set |
ALI |
|
Max. Onboard DRAM |
32MB |
|
SRAM Cache |
None |
|
BIOS |
Acer |
|
Dimensions |
220mm x 220mm |
|
I/O Options |
None |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J3 |
Reset switch |
J4/11 & 12 |
|
Power LED & keylock |
J4/1 - 5 |
Turbo switch |
J4/14 - 16 |
|
Speaker |
J4/7 - 10 |
Turbo LED |
J4/18 & 19 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
CMOS memory normal operation |
JP1 |
open | |
|
CMOS memory clear |
JP1 |
closed | |
|
Battery select internal |
J3 |
pins 2 & 3 closed | |
|
Battery select external |
J3 |
connected | |
|
CPU TYPE CONFIGURATION | ||
|
CPU |
JP6 |
JP7 |
|
80486DX2 |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
ODP486SX |
open |
pins 1 & 2 closed |
|
80486DX |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
80487SX |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
80486SX |
open |
pins 1 & 2 closed |
|
CPU SPEED CONFIGURATION | |||||
|
CPU Speed |
OSC1 |
JP8 |
JP9 |
JP10 |
JP11 |
|
20MHz |
40MHz |
pins 2 & 3 |
pins 1 & 2 |
pins 1 & 2 |
pins 2 & 3 |
|
25MHz |
50MHz |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
|
33MHz |
66MHz |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
pins 2 & 3 |
|
50MHz |
50MHz |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
|
60MHz |
66MHz |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
pins 2 & 3 |
|
Note:Pins designated should be in the closed position. | |||||
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(4) 256K x 9 |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
|
5MB |
(4) 1M x 9 |
(4) 256K x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |