UNIDENTIFIED
AC 486 MODEL PQFP
Processor |
80486SX/80487SX/80486DX/80486DX2 |
Processor Speed |
16/20/25/33/50(internal)/66(internal)MHz |
Chip Set |
ACC |
Max. Onboard DRAM |
32MB |
Cache |
None |
BIOS |
AMI |
Dimensions |
254mm x 236mm |
I/O Options |
None |
NPU Options |
None |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
External battery |
J1 |
Reset switch |
J4 |
Turbo LED |
J2 |
Speaker |
J5 |
Turbo switch |
J3 |
Power LED & keylock |
J6 |
USER CONFIGURABLE SETTINGS | |||
Function |
Jumper |
Position | |
» |
Monitor type select monochrome |
JP2 |
pins 1 & 2 closed |
» |
Monitor type select color |
JP2 |
pins 2 & 3 closed |
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) 256K x 9 |
(4) 1M x 9 |
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
16MB |
(4) 4M x 9 |
NONE |
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
CPU TYPE CONFIGURATION | |||
Type |
JP3 |
JP4 |
JP5 |
80486SX |
Open |
pins 2 & 3 closed |
pins 2 & 3 closed |
80487SX |
Closed |
pins 1 & 2, 3 & 4 closed |
pins 3 & 4 closed |
80486DX |
Closed |
pins 1 & 2, 3 & 4 closed |
pins 1 & 2 closed |
80486DX2 |
Closed |
pins 1 & 2, 3 & 4 closed |
pins 1 & 2 closed |
CPU SPEED CONFIGURATION | |||
Speed |
JP6 |
JP7 |
JP8 |
16MHz |
Closed |
Closed |
Closed |
20MHz |
Open |
Closed |
Closed |
25MHz |
Closed |
Open |
Closed |
33MHz |
Closed |
Closed |
Open |
50iMHz |
Closed |
Open |
Closed |
66iMHz |
Closed |
Closed |
Open |